S. R. James

Oregon State University, Corvallis, Oregon, United States

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Publications (28)25 Total impact

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    ABSTRACT: Purple Pelisse is a specialty ‘fingerling’ potato with purple skin and dark purple flesh. It has medium maturity and sets a large number of smooth, small, fingerling-shaped tubers. The tubers have medium specific gravity and high levels of antioxidants. This potato variety is mainly intended for the fresh market but it can also be used for processing; chips made from Purple Pelisse tubers retain their bright purple color and have a pleasant taste. Purple Pelisse is moderately resistant to common scab and potato virus Y and susceptible to most of the other common potato diseases. Purple Pelisse resulted from a cross between NDOP5847-1 and bulked pollen of red-fleshed potatoes. It was first selected from seedling tubers planted and grown at Madras, Oregon in 2001 and was subsequently evaluated for six additional years in public and industry trials throughout the western U.S, including Western Regional Red/Specialty Trials in 2006 and 2007. Purple Pelisse was officially released as a variety in 2009 by the Pacific Northwest (Tri-State) Potato Variety Development Program.
    American Journal of Potato Research 08/2012; 89:306-314. DOI:10.1007/s12230-012-9254-3 · 1.09 Impact Factor
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    ABSTRACT: Owyhee Russet (AO96160-3) originated from a cross between A89384-10 and A89512-3 in 1996. Owyhee Russet was released in 2009 by Oregon State University, in cooperation with the USDA-ARS and the Agricultural Experiment Stations of Idaho and Washington and is a product of the Northwest Potato Variety (Tri-State) Development Program. Owyhee Russet has semi-erect medium sized vines with medium to late maturity. The tubers are long, with a tan skin, medium russeting, and attractive tuber appearance for fresh market. Owyhee Russet was evaluated in several locations across the Northwest for more than 15 years. Total yield of Owyhee Russet is similar to that of Russet Burbank and Ranger Russet but significantly higher than Russet Norkotah. U.S. No.1 tuber yield of Owyhee Russet is significantly higher than Russet Burbank and Russet Norkotah, resulting in substantially higher marketable yield. Owyhee Russet tubers have significantly higher specific gravity than Russet Burbank and Russet Norkotah. Fry color following tuber storage at 4°C and 9°C is significantly lighter for Owyhee Russet than the comparison varieties. Relative strengths include high yield with a very high proportion of U.S. No.1 tubers, good tuber appearance and excellent processing quality, resistance to cold sweetening, common scab and Fusarium dry rot. Weaknesses include susceptibility to foliar and tuber late blight and susceptibility to metribuzin herbicide injury. Allelic patterns of five SSR markers have shown that Owyhee Russet has a distinctive DNA genetic fingerprint from its russet type reference varieties which are Ranger Russet, Russet Burbank, and Russet Norkotah.
    American Journal of Potato Research 06/2012; 89:175-183. DOI:10.1007/s12230-012-9239-2 · 0.95 Impact Factor
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    ABSTRACT: Palisade Russet is a medium-late maturing, lightly russeted potato cultivar notable for its resistance to late blight (Phytophthora infestans) infection of foliage and tuber. Palisade Russet is suitable for processing with low tuber glucose concentrations observed following long-term storage at a temperature as low as 5.6°C with consistently acceptable fry color scores (USDA value ≤2.0) following storage at temperatures of 5.6 to 8.9°C. Reducing sugars are also maintained uniformly throughout the tuber, resulting in a low incidence of sugar ends in French fries relative to standard processing cultivars such as Russet Burbank and Ranger Russet. Palisade Russet has shown high specific gravities in western production regions of the U.S. which may limit its acceptance by the western processing industry. However, in potato production regions with inherently low specific gravities, Palisade Russet could have potential as a processing cultivar. In full-season trials conducted in Idaho, Oregon, and Washington over a 5 year period, the average total yield of Palisade Russet across all three states was very similar to yields observed for Ranger Russet and Russet Burbank. However, the U.S. No. 1 yield of Palisade Russet was 3% and 31% higher relative to Ranger Russet and Russet Burbank, respectively. In addition to late blight, Palisade Russet is also resistant to Verticillium wilt, black dot, and pink rot, and has a moderate level of resistance to net necrosis, PVY, and early blight of both the foliage and tuber. The disease resistances of Palisade Russet make it a good candidate for organic production, or for use by growers seeking reduced pesticide inputs. Palisade Russet displays a low incidence of second growth and growth cracks, especially relative to Russet Burbank, and is intermediate between Ranger Russet and Russet Burbank for incidence of hollow heart/brown center. Blackspot bruise expression for Palisade Russet is less pronounced than for either Ranger Russet or Russet Burbank, however it is slightly more susceptible to shatter bruise. Palisade Russet was released in 2011 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon, and Washington, and is a product of the Pacific Northwest Potato Variety (Tri-State) Development Program.
    American Journal of Potato Research 04/2012; 89:89-101. DOI:10.1007/s12230-011-9224-1 · 1.09 Impact Factor
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    ABSTRACT: Classic Russet is a medium maturing potato cultivar with rapid tuber bulking making it suitable for early harvest, as well as full-season production. Classic Russet is notable for its attractive tubers with medium russet skin and excellent culinary characteristics. It resulted from a 1995 cross between Blazer Russet and Summit Russet and was released in 2009 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon and Washington and is a product of the Northwest Potato Variety (Tri-State) Development Program. Classic Russet also shows potential as an early season processing cultivar, with fry color comparable to Russet Burbank and Ranger Russet. Classic Russet total yields were comparable to Russet Norkotah and Ranger Russet in early harvest trials and comparable to Ranger Russet and Russet Burbank in full season trials. When averaged across sites in early harvest or full season trials, U.S. No. 1 yields of Classic Russet were generally greater than those of Russet Norkotah, Ranger Russet, and Russet Burbank. Protein content for Classic Russet is relatively high, averaging 22% higher than Ranger Russet, 32% higher than Russet Burbank and 24% higher than Russet Norkotah. Specific gravity of Classic Russet in early harvest trials was comparable to Russet Norkotah but lower than Ranger Russet and was similar to Russet Burbank in full season trials. The incidence of hollow heart in Classic Russet is low, similar to that of Ranger Russet. It is less susceptible to blackspot bruise than Russet Burbank, Ranger Russet and Russet Norkotah but shatter bruise can be a concern if not matured properly prior to harvest. Classic Russet is moderately resistant to common scab and dry rot and is moderately susceptible to foliar and tuber infections of early blight and symptoms of corky ringspot. It is susceptible to Verticillium wilt, soft rot, foliar and tuber late blight, PLRV and PLRV net necrosis, and the common strain of potato virus Y (PVYA degrees).
    American Journal of Potato Research 08/2010; 87(4):360-373. DOI:10.1007/s12230-010-9142-7 · 0.95 Impact Factor
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    ABSTRACT: Highland Russet is a late-season potato variety with light russet skin notable for its high yield of uniform U.S. No. 1 tubers, and good processing and culinary qualities. It resulted from a 1990 cross between Ranger Russet and Russet Legend and has been evaluated for over 15years in public and industry trials throughout the western U.S. Highland Russet was released in 2006 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon and Washington and is a product of the Northwest Potato Variety (Tri-State) Development Program. It is suitable for processing into French fries and other frozen potato products and due to its large blocky shape, recovers a high proportion of fries per unit weight of tubers. Fry color and processing ratings for Highland Russet were similar to Ranger Russet and Russet Burbank but fry color uniformity was higher than either of the standard varieties. In full-season trials conducted over a three-year period in the states of Idaho, Oregon, Washington, Colorado, and California; Highland Russet averaged 7% and 9% higher total yields and 21% and 52% higher U.S. No. 1 yields than Ranger Russet and Russet Burbank, respectively. It has moderately high specific gravity, with values similar to Ranger Russet and higher than Russet Burbank. Highland Russet is moderately resistant to Verticillium wilt and powdery scab root galling, as well as to tuber infections of late blight. It is also moderately resistant to common strains of potato virus Y (PVYO) but is susceptible to PVYNTN. It is moderately susceptible to pink rot, common scab, powdery scab of the tuber and early blight of the tuber, as well as to Pectobacterium soft rot and Fusarium dry rot. Highland Russet is susceptible to foliar late blight, PLRV infection, Root-knot nematode and corky ringspot but is moderately resistant to PLRV net necrosis. The incidence of hollow heart in Highland Russet is low, similar to that of Ranger Russet and lower than Russet Burbank, Blackspot bruise reaction of Highland Russet is similar to Russet Burbank but it is less susceptible to shatter bruise. Highland Russet es una variedad tardía de papa, de piel ligeramente rugosa, notable por su rendimiento de tubérculos U.S. No. 1 y sus buenas cualidades culinarias y de procesamiento. Es el resultado de cruzamientos entre Ranger Russet y Russet Legend en 1990 y ha sido evaluada por más de 15 años en pruebas públicas y de la industria en el Oeste de los EE.UU. Highland Russet fue liberada el 2006 por el USDA-ARS y por las Estaciones Experimentales Agrícolas de Idaho, Oregon y Washington y es un producto del Programa de Desarrollo Nororiental (Tres Estados) de Variedades de Papa. Es apropiada para el procesado de papa frita y otros productos de papa congelada debido a que es grande, da una alta proporción de tubérculos por unidad de peso. La clasificación del color de fritura y cantidad de procesado de Highland Russet fue similar a Ranger Russet y Russet Burbank pero la uniformidad del color de la fritura fue más alta que cualquiera de las variedades estándar. En pruebas de ciclo completo realizadas por tres años en los Estados de Idaho Oregon, Washington, Colorado y California, Highland Russet promedió 7% y 9% de mayores rendimientos totales y 21% y 52% mayor rendimiento de U.S.No.1 que Ranger Russet y Russet Burbank, respectivamente. Tiene una gravedad específica moderadamente alta, con valores similares a Ranger Russet y más alta que Russet Burbank. Highland Russet es moderadamente resistente a la marchitez por Verticillium y el agallado de la raíz debido a sarna polvorienta, lo mismo que a infecciones del tubérculo por tizón tardío. Es también moderadamente resistente a variantes comunes del virus Y de la papa (PVY), pero es susceptible al PVYNTN. Es moderadamente susceptible a la pudrición rosada, sarna común, sarna polvorienta del tubérculo, tizón temprano del tubérculo, lo mismo que a pudrición blanda por Pectobacterium y pudrición seca por Fusarium. Highland Russet es susceptible a tizón tardío foliar, infección por PLRV, nematodo del nudo y mancha corchosa en anillo, pero es moderadamente resistente a la necrosis en red por PLRV. La incidencia de corazón vacío es baja en Highland Russet, similar a la de Ranger Russet y más baja que la de Russet Burbank, la reacción a la mancha negra por magulladura de Highland Russet es similar a la de Russet Burbank pero es menos susceptible a magulladuras por golpe.
    American Journal of Potato Research 06/2009; 86(3):171-182. DOI:10.1007/s12230-009-9069-z · 0.95 Impact Factor
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    ABSTRACT: Premier Russet is a russet-skinned, high yielding potato cultivar suitable for processing or fresh-pack. Premier Russet is notable for its resistance to the accumulation of reducing sugars in its tubers. This characteristic allows tubers of Premier Russet to be stored at temperatures as low as 5.6°C for 250days without the need for reconditioning prior to processing. The low temperature sweetening resistance of Premier Russet allows for its storage at colder temperatures which contributes to prolonged tuber dormancy and quality, and to a reduction in the incidence and severity of storage diseases associated with the higher storage temperatures typically used for industry-standard cultivars such as Russet Burbank and Ranger Russet. Premier Russet was released in 2006 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon, and Washington, and is a product of the Northwest Potato Variety (Tri-State) Development Program. In full-season trials conducted over a 3-year period in the states of Idaho, Oregon, Washington, Colorado, California, New Mexico, and Texas, Premier Russet averaged 5% and 4% higher yields than Ranger Russet and Russet Burbank, respectively, and had a higher percentage of US No. 1 yield than either cultivar. Specific gravity of Premier Russet is consistently greater than that of Ranger Russet or Russet Burbank. Premier Russet is resistant to common and powdery scab, very resistant to the common strain of potato virus Y (PVYO), and moderately resistant to Verticillium wilt, early blight of the foliage and tuber, Pectobacterium (Erwinia) soft rot, and to galling of roots by powdery scab. Blackspot bruise reaction for Premier Russet is similar to that of Ranger Russet. The incidence of hollow heart in Premier Russet is higher than that of Ranger Russet or Russet Burbank. Cultural recommendations to manage hollow heart in Premier Russet are provided. Premier Russet es un cultivar de papa de cáscara rugosa y alto rendimiento, conveniente para procesamiento o consumo fresco. El “LS” en su designación clonal es una observación “bajo en azúcar” y es descriptivo de la resistencia que tiene este cultivar para la acumulación de azúcares reductores en el tubérculo. Esta característica permite que los tubérculos de Premier Russet se almacenen a temperatura tan baja como 5.6 C por 250 días sin necesidad de condicionamiento antes de procesar. La resistencia a endulzar por baja temperatura de Premier Russet permite su almacenamiento a menores temperaturas lo cual contribuye al prolongado estado de latencia y la calidad del tubérculo, y a la reducción en incidencia y severidad de enfermedades de almacén asociadas con alta temperatura típicamente usadas para cultivares estándar de la industria como Russet Burbank y Ranger Russet. Premier Russet fue liberada el 2006 por USDA-ARS y las Estaciones Experimentales Agrícolas de Idaho, Oregon y Washington y es producto del Programa de Desarrollo (Tri - State) de variedades de Papa Noroccidental. En pruebas del periodo de cultivo completo realizadas durante tres años en los estados de Idaho, Oregon y Washington, Colorado, California, Nuevo México y Texas, Premier Russet dio 5% y 4% rendimientos mas altos que Ranger Russet y Russet Burbank, respectivamente y tuvo los más altos porcentajes de producción de US N° 1 que ambos cultivares. La gravedad específica de Premier Russet es consistentemente mayor que Ranger Russet y Russet Burbank. Premier Russet es resistente a la sarna común y a la roña, muy resistente a la variante común del virus Y de la papa (PVY°) y moderadamente resistente a la marchitez, por Verticillium, tizón temprano del follaje y el tubérculo, pudrición blanda por Pectobacterium (Erwinia) y agallamiento de las raíces por roña. La reacción de mancha negra por magulladura de Premier Russet es similar a la de Ranger Russet. La incidencia de corazón vacío es más alta que en Ranger Russet o Russet Burbank. Se dan recomendaciones culturales para el manejo de corazón vacío en Premier Russet.
    American Journal of Potato Research 06/2008; 85(3):198-209. DOI:10.1007/s12230-008-9013-7 · 0.95 Impact Factor
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    ABSTRACT: Willamette (AO91812-1), a high-yielding, round, white-skinned variety with good chipping qualities, was released in 2003 by the Oregon, Idaho and Washington Agricultural Experiment Stations and the US Department of Agriculture–Agricultural Research Service. Willamette was selected at Powell Butte, Oregon in 1993 from a cross between NDA2031-2 and A86463-3. Willamette vines are relatively large, vigorous and medium-late in maturity. Yields of Willamette were higher than Atlantic across a number of western states (total yield: Willamette 60.6Mg ha−1, Atlantic 50.8Mg ha−1). Willamette exhibited fewer internal tuber defects than Atlantic tubers (i.e. hollow heart and brown center: Willamette 2.0%, Atlantic 8.7%), but had similar levels of external defects. Willamette chips well from 10°C storage (Willamette chip color 1.4, Atlantic 1.6) but not from 4.4°C. Tuber specific gravity is comparable to that of Atlantic (1.084). Willamette tubers contain slightly lower levels of total glycoalkaloids (Willamette 3.1mg 100g−1, Atlantic 6.8mg 100g−1) and vitamin C (Willamette 16.4mg 100g−1, Atlantic 21.7mg 100g−1) than those of Atlantic, but has similar levels of dry matter, protein, dextrose and sucrose. Compared to Atlantic, Willamette shows greater resistance to Verticillium wilt and potato leafroll virus, similar susceptibility to early blight, foliar late blight, Erwinia soft rot and potato virus Y, and greater susceptibility to tuber late blight and common scab. Willamette (AO91812–1), una variedad de alto rendimiento, redonda, de piel blanca, buenas cualidades para hojuelas, fue liberada en 2003, por las Estaciones Experimentales Agrícolas de Oregon, Idaho y Washington y el Servicio de Investigación Agrícola del Departamento de Agricultura de los Estado Unidos. Willamette fue seleccionado en Powell Butte, Oregon en 1993 de un cruzamiento entre NDA2031-2 y A86463-3. Las plantas de Willamette son relativamente grandes, vigorosas de madurez media–tardía. Los rendimientos de Willamette son mas altos que los de ‘Atlantic’ en varios estados del oeste (rendimiento total: Willamette 60.6Mg ha−1, Atlantic 50.8Mg ha−1). Willamette tuvo menos defectos internos del tubérculo que Atlantic (ie. Corazón vacío y oscurecimiento central: Willamette 2%, Atlantic 8.7%), pero tuvieron niveles similares de defectos externos. Willamette produce bien hojuelas de papa procedentes de almacenamiento a 10°C (color de hojuelas de Willamette 1.4, Atlantic 1.6), pero no procedentes de 4.4°C. La gravedad específica del tubérculo es comparable a la de Atlantic (1.084). Los tubérculos de Willamette contienen ligeramente menores niveles de glicoalcaloides (Willamette 3.1mg 100g−1, Atlantic 6.8mg 100g−1) y vitamina C (Willamette 16.4mg 100g−1, Atlantic 21.7mg 100g−1); pero tiene niveles similares de materia seca, proteína, dextrosa y sacarosa. Comparados con Atlantic, Willamette muestra mayor resistencia a marchitez por Verticillium y PLRV, similar susceptibilidad al tizón temprano, tizón tardío foliar, pudrición blanda causada por Erwinia y al PVY, y mayor susceptibilidad al tizón tardío al tubérculo y sarna común.
    American Journal of Potato Research 02/2008; 85(1):85-92. DOI:10.1007/s12230-008-9006-6 · 0.95 Impact Factor
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    ABSTRACT: ‘Blazer Russet’ is an early to mid-season cultivar notable for its high U.S. No. 1 yield of medium-russeted tubers and its good processing and culinary qualities. It was derived from the cross A7816-14 x ‘NorKing Russet’ and was released in 2005 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon and Washington. Blazer Russet is very suitable for processing into French fries and other frozen potato products directly from the field or from extended storage, with higher merit scores than ‘Russet Burbank’ and ‘Ranger Russet’ in processing and post-harvest evaluations. Blazer Russet also has high merit for use in the fresh market, with sensory evaluations comparable to those of Russet Burbank. Total yields for Blazer Russet at five early harvest trial locations in the western United States were 12% greater than either ‘Russet Norkotah’ or ‘Shepody’, while U.S. No. 1 yields were 12% greater than Russet Norkotah and 35% greater than Shepody. Specific gravities of Blazer Russet tubers were comparable to tubers of Shepody, and higher than those of Russet Norkotah in early harvest trials. In full-season trials in the western United States, total yields for Blazer Rus set were slightly lower than Ranger Russet and slightly higher than Russet Burbank, but U.S. No. 1 yields were 8% greater than Ranger Russet and 38% greater than Russet Burbank. In these full-season trials, tuber specific gravity of Blazer Russet was similar to Russet Burbank, but lower than Ranger Russet. Blazer Russet is resistant to sugar ends, tuber malformations and most internal and external defects, the exception being its moderate susceptibility to hollow heart. Blazer Russet is resistant to common scab, tuber powdery scab and PVX, and has moderate resistance to blackspot bruise and tuber late blight infections. It is moderately susceptible to powdery scab root galling, PVY0, early blight infection of the tuber, Erwinia soft rot and Fusarium dry rot. Blazer Russet is susceptible to Verticillium wilt, pink rot, PLRV net necrosis, corky ringspot, and foliar early blight and late blight. ‘Blazer Russet’ es un cultivar de precoz a mediano, notable por su rendimiento de tubérculos U.S. No. 1, de tubérculos rugoso mediano y buenas cualidades culinarias y de procesamiento. Es derivado de un cruzamiento de A7816-14 x ‘NorKing Russet’ y fue liberado en 2005 por el USDA-ARS y las Estaciones Experimentales Agrícolas de Idaho, Oregon y Washington. Blazer Russet es muy apropiado para el procesamiento de papa frita y otros productos congelados, directamente del campo o de almacenamiento prolongado, con mayores méritos que ‘Russet Burbank’ y ‘Ranger Russet’ en evaluaciones de procesamiento de pos cosecha. Blazer Russet también tiene grandes méritos para su comercialización en fresco, con evaluaciones sensoriales comparables a las de Russet Burbank. El rendimiento total de Blazer Russet en pruebas de cosecha temprana en cinco localidades en el oeste de los Estados Unidos fueron 12% mayores que ‘Russet Norkotah’ o ‘Shepody’, mientras que el rendimiento de U.S. No. 1 fue 12% mayor que Russet Norkotah y 35% más que Shepody. La gravedad específica de los tubérculos de Blazer Russet fue comparable a los de Shepody y más alta que los de Russet Norkotah en pruebas de cosecha temprana. En pruebas de periodo de cultivo completo en el Oeste de Estados Unidos, el rendimiento total de Blazer Russet fue ligeramente menor que el de Ranger Russet y un poco mayor que Russet Burbank, pero los rendimientos de U.S. No. 1 fueron 8% mayores que Ranger Russet y 38% mayores que Russet Burbank. En las pruebas de periodo de cultivo completo, la gravedad específica del tubérculo de Blazer Russet fue similar a Russet Burbank, pero más baja que Ranger Russet. Blazer Russet es resistente a punta azucarada, malformaciones del tubérculo y la mayoría de defectos internos y externos, con excepción de su moderada susceptibilidad al corazón vacío. Blazer Russet es resistente a la sarna común, sarna polvorienta del tubérculo y PVX y tiene resistencia moderada a la mancha negra por golpes y a la infección al tubérculo de tizón tardío. Es moderadamente susceptible a la agalla de la raíz por sarna polvorienta, PVY0, infección al tubérculo de tizón temprano, pudrición blanda por Erwinia y pudrición seca por Fusarium. Blazer Russet es susceptible a marchitez por Verticillium, pudrición rosada, a la necrosis en red por PLRV, anillo corchoso y tizón temprano y tardio al follaje.
    American Journal of Potato Research 11/2007; 84(6):447-457. DOI:10.1007/BF02987881 · 0.95 Impact Factor
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    ABSTRACT: GemStar Russet, derived from the cross Gem Russet x A8341-5, was released in 2004 by the USDA/ARS and the agricultural experiment stations of Idaho, Oregon, and Washington. The foliage of GemStar Russet is dark yellowish-green, spreading, with large leaves and abundant white flowers. The tubers are brown, medium to heavily russeted, oblong, with a slightly prominent eyebrow, white flesh, and indistinct pith. GemStar Russet was compared with Russet Burbank and Russet Norkotah in trials across the Pacific Northwest for yield, quality, and disease response. Except for locations in southern Idaho, in general, GemStar Russet produced slightly lower total yield than Russet Burbank, but much higher U.S. No. 1 yield. When compared with Russet Norkotah, GemStar Russet produced similar total and U.S. No. 1 yields in early harvest trials but higher total and U.S. No. 1 yields in late-harvest trials. When observed for defect problems, GemStar Russet exhibited resistance to second growth, growth cracks, and stemend discoloration, moderate resistance to blackspot and shatter bruising, but a high level of susceptibility to hollow heart. In product quality tests, GemStar Russet was rated superior to Russet Burbank for french fry quality and comparable for baked potato quality. GemStar Russet was found to be immune to PVX, resistant to common scab and powdery scab, moderately resistant to Verticillium wilt, tuber net necrosis caused by PLRV, and corky ringspot. It demonstrated susceptibility to late blight, PLRV, dry rot, soft rot, and ringrot and extreme susceptibility to PVYo. Biochemical analysis of GemStar Russet tubers showed them to be higher in protein and much higher in vitamin C than those of Russet Burbank or Russet Norkotah. Three-year average for tuber glycoalkaloid concentration was 1.5 mg 100 g−1. En el ano 2004 el USDA/ARS y las Estaciones Experimentales Agrícolas de Idaho, Oregon y Washington liberaron la variedad GemStar Russet derivada del cruzamiento de Gem Russet x A8341-5. El follaje de GemStar Russet es amarillo verdoso oscuro, extendido, con hojas grandes y abundantes flores blancas. Los tubérculos son pardos, mediana a fuertemente rojizos, oblongos con prominencia del ojo ligeramente pronunciada, pulpa blanca y médula indistinguible. GemStar Russet ha sido comparada con Russet Burbank y Russet Norkotah en pruebas realizadas a lo largo del Pacífico nor-occidental para determinar rendimiento, calidad y respuesta a enfermedades. Con excepción de localidades del sur de Idaho, en general, GemStar Russet dio rendimientos totales ligeramente inferiores a Russet Burbank, pero mucho mayor rendimiento de US No 1. Comparado con Russet Norkotah, GemStar Russet produjo un rendimiento total similar y de US No 1 en pruebas de cosecha temprana, pero totales más altos y rendimiento de US No 1 en pruebas de cosecha tardía. Cuando se hicieron observaciones para determinar defectos, GemStar Russet exhibe resistencia a crecimiento secundario, rajaduras de crecimiento y decoloración de la base del tubérculo, resistencia moderada a mancha negra y magulladuras por golpe, pero un alto nivel de susceptibilidad al corazón vacío. En pruebas de calidad del producto GemStar Russet fue calificado como superior a Russet Burbank para papa frita y similar para papa horneada. Se encontró que GemStar Russet es inmune al virus PVX, resistente a la sarna común y sarna polvorienta, moderadamente resistente a la marchitez por Verticillium, necrosis reticulada del tubérculo causada por el virus PLRV y mancha corchosa anillada. Demostró susceptibilidad al tizón tardío, PLRV, pudrición seca, pudrición blanda y susceptibilidad extrema a PVYo. El análisis bioquímico de los tubérculos de GemStar Russet dio un alto contenido de proteína y mucho más alto de vitamina C que los de Russet Burbank o Russet Norkotah. El promedio de tres años sobre concentración de glicoalcaloides en el tubérculo fue de 1.5mg 100g-1.
    American Journal of Potato Research 03/2006; 83(2):171-180. DOI:10.1007/BF02872152 · 0.95 Impact Factor
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    ABSTRACT: Western Russet, designated experimentally as A7961-1, and resulting from the cross A68113-4 x Bel-Rus, was released in 2004 by the USDA/ARS and the agricultural experiment stations of Idaho, Oregon, and Washington. The foliage of Western Russet is spreading, with medium-sized olive-green leaves and abundant white flowers. The tubers are tan, with medium russet skin, oblong shape, a slightly prominent eyebrow, white flesh, and distinctly visible pith. Western Russet was compared with Russet Burbank in trials across the Pacific Northwest for yield, quality, and disease response. In general, Western Russet produced lower total yields than Russet Burbank, but on average and depending on location, similar U.S. No. 1 yields. When observed for defect problems, Western Russet exhibited resistance to second growth, growth cracks, shatter bruise, stem-end discoloration, and heat necrosis, moderate resistance to hollow heart, and moderate susceptibility to blackspot bruise. In product quality tests, Western Russet was rated similar to Russet Burbank for french fry and dehydrated potato flake quality and slightly inferior for baked potato quality. In replicated evaluations, Western Russet was found to have good field resistance to common scab and PVYo, and moderate resistance to verticillium wilt and tuber net necrosis caused by PLRV. It demonstrated susceptibility to late blight, foliar PLRV, dry rot, soft rot, and tuber early blight. Biochemical analysis of Western Russet tubers showed markedly higher vitamin C content than those of Russet Burbank. Tuber glycoalkaloid concentration in tubers produced in a 1988 trial was 1.0 mg 100 g−1.
    American Journal of Potato Research 03/2006; 83(2). DOI:10.1007/BF02872151 · 0.95 Impact Factor
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    ABSTRACT: The potato cultivar Defender is high-yielding, white-skinned, and notable for having foliar and tuber resistance to late blight infection caused byPhytophthora infestans (Mont.) de Bary. It was released in 2004 by the USDA-ARS and the agricultural experiment stations of Idaho, Oregon, and Washington. Defender is suitable for processing into french fries and other frozen potato products directly from the field or from storage. Defender also may be used for fresh markets in regions such as California, where cultivars with long tubers and white skin are traditionally grown. Resistances to late blight and other potato diseases make Defender an ideal candidate for organic potato production. Defender consistently produced greater total and U.S. No. 1 yields than ‘Russet Burbank’ in Idaho trials. In early harvest trials conducted in the western U.S., average total yields of Defender were 17% and 23% greater than yields for ‘Ranger Russet’ and ‘Shepody’, respectively. In full-season trials conducted in the western U.S., Defender averaged 10% and 15% higher yields than Ranger Russet and Russet Burbank, respectively. Specific gravity of Defender is consistently high, with values comparable to those of Ranger Russet; tuber ascorbic acid (Vitamin C) levels are also high. In addition to late blight, Defender also is resistant to tuber early blight (Alternaria solani, (Ellis & G. Martin), L.R. Jones & Grout), potato virus X, and net necrosis; it has moderate levels of resistance to Verticillium wilt (Verticillium dahliae, Kleb), pink rot, foliar early blight, corky ringspot, and Erwinia soft rot. Defender is susceptible to scab (common and powdery) and potato leafroll virus; it has moderate susceptibility to dry rot (Fusarium spp.) and potato virus Y. Susceptibilities to internal necrosis, tuber greening, and blackspot bruise also have been noted, but may be minimized through cultural and harvest practices. Defender es un cultivar de papa de alto rendimiento, piel blanca y excelente por su resistencia al tizón tardío causado porPhytophthora infestans (Mont.) de Bary, tanto a la infección foliar como a la de los tubérculos. Ha sido liberada el 2004 por USDA-ARS y las Estaciones Experimentales Agrícolas de Idaho, Oregon y Washington. Defender es apropiado para el procesamiento de papa frita y otros productos congelados de papa, directamente del campo o del almacén. Defender puede también ser usado en regiones como California, donde se cultivan tradicionalmente variedades de tubérculos alargados y piel blanca. La resistencia al tizón tardío y otras enfermedades de la papa hace de Defender un candidato ideal para la producción orgánica. Defender tuvo consistentemente un mayor rendimiento de tubérculos de grado “US No. 1” que Russet Burbank en pruebas en Idaho. En ensayos de cosecha temprana realizados en el oeste de EUA, el promedio de rendimiento total de Defender fue de 17 y 23% mayor que el de las variedades Ranger Russet y Shepody respectivamente. En ensayos de ciclo completo realizadas en el oeste, Defender tuvo rendimientos 10 y 15% mayores que Ranger Russet y Russet Burbank respectivamente. El peso específico de Defender es consistentemente alto, con valores comparables a los de Ranger Russet y los niveles de ácido ascórbico (Vitamina C) son también altos. Además de ser resistente al tizón tardío, Defender es también resistente al tizón temprano (Alternaria solani (Ellis & G. Martín) L. R. Jones & Grout), Virus X de la papa y necrosis en red. Tiene niveles moderados de resistencia a marchitez por Verticillium (Verticillium dahliae Kleb.), pudrición rosada, tizón foliar temprano, mancha corchosa en anillo y pudrición blanda causada por Erwinia. Defender es susceptible a la sarna (común y polvorienta) y al virus del enrollamiento; tiene moderada susceptibilidad a la pudrición seca (Fusarium spp.) y al virus Y de la papa. También se ha notado susceptibilidad a necrosis interna, verdeamiento del tubérculo y mancha negra, pero estas pueden minimizarse a través de prácticas culturales.
    American Journal of Potato Research 01/2006; 83(1):9-19. DOI:10.1007/BF02869605 · 0.95 Impact Factor
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    ABSTRACT: Summit Russet (A84118-3), the result of the cross A77236-6 x TND329-1Russ, was released in 2003 by the USDA/ARS and the Agricultural Experiment Stations of Idaho, Oregon, and Washington. The vines of Summit Russet are erect, with very thick stems, large yellowish-green leaves and abundant white flowers. The tubers are tan, with medium russet skin, long-flattened shape, a slightly prominent eyebrow, white flesh, and moderately prominent pith. Tuber dormancy is very long. Summit Russet was compared with Russet Burbank in trials across the Pacific Northwest for yield, quality, and disease response. In general, Summit Russet produced similar or lower total yields than did Russet Burbank, but higher U.S. No. 1 yields. In Idaho variety trials, Summit Russet exhibited resistance to second growth, growth cracks, blackspot bruise, and stem-end discoloration, and moderate susceptibility to hollow heart and shatter bruise. In comprehensive product quality evaluations, Summit Russet was rated superior to Russet Burbank for french fry quality and similar for baked potato quality. French fry quality was retained after long-term storage. In replicated disease trials, Summit Russet was found to have good resistance to common scab, early blight tuber rot, and Verticillium wilt, and moderate resistance to Fusarium dry rot and tuber net necrosis caused by PLRV. It demonstrated susceptibility to late blight, foliar PLRV, PVX, PVYo, and bacterial soft rot. Biochemical analysis of Summit Russet tubers showed them to be higher in total solids and sucrose, and lower in dextrose than those of Russet Burbank. Tuber glycoalkaloid concentration as measured from tubers produced in 1994–1996 trials was 6.7 mg 100 g1. Summit Russet (A84118-3), es el resultado del cruzamiento de A77236-6 x TND329-1Russ, que fue liberada en el 2003 por el USDA/ARS y la Estación Experimental Agrícola de Idaho, Oregon y Washington. Las plantas de Russet Summit son erectas, con tallos gruesos, hojas grandes de color verde amarillento y abundantes flores blancas. Los tubérculos son bronceados, con piel rosada, achatados, largos, una ceja ligeramente prominente, pulpa blanca y médula moderadamente prominente. El estado de dormacia del tubérculo es largo. En pruebas a lo largo del noroeste del Pacífico se comparó Summit Russet con Russet Burbank, para rendimiento, calidad y respuesta a las enfermedades. En general, Summit Russet produjo rendimientos totales similares o más bajos que Russet Burbank pero un mayor número de tubérculos U.S. No 1. En Idaho, en ensayos varietales, Summit Russet mostró tubérculos con resistencia a crecimientos secundarios, rajaduras, manchas por magulladuras, decoloración del extremo del tallo y susceptibilidad moderada al corazón vacío y daños por golpe. En pruebas de calidad Summit Russet fue superior a Russet Burbank para papa frita y similar para calidad de horneado. La buena calidad para fritura se mantuvo por tiempo prolongado de almacenamiento. En repetidas pruebas para enfermedades se encontró que Summit Russet tiene buena resistencia a sarna común, pudrición del tubérculo por tizón temprano y marchitez por Verticillium, tiene resistencia moderada a pudrición seca por Fusarium y necrosis reticulada causada por PLRV. Demostró susceptibilidad a tizón tardío, PLRV, PVX, PVYo y pudrición bacteriana blanda. El análisis bioquímico de los tubérculos de Summit Russet mostró un alto contenido de sólidos totales y sacarosa y bajo contenido de dextrosa que los de Russet Burbank. La concentración de glicoalcaloides medida en tubérculos producidos en las pruebas de 1994 a 1996 fue de 6.7mg/100g1.
    American Journal of Potato Research 11/2005; 82(6):425-432. DOI:10.1007/BF02872220 · 0.95 Impact Factor
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    ABSTRACT: ‘Alturas’, a late-maturing, high-yielding, russet potato cultivar with high tuber specific gravity, was released in 2002 by the USDA-ARS and the Agricultural Experiment Stations of Idaho, Oregon, and Washington. Originally selected for dehydration processing, its cold-sweetening resistance also makes it suitable for processing out of storage into french fries and other frozen potato products. Culinary quality is high, with larger tubers suitable for fresh market if heavily russeted skin is not essential. Alturas consistently produced greater total and U.S. No. 1 yields than ‘Russet Burbank’ and ‘Ranger Russet’ in southern Idaho trials. Across other western trial sites, total yields of Alturas have on average been 29% and 14% greater than Russet Burbank and Ranger Russet, respectively. Alturas is resistant to Verticillium wilt (Verticillium dahliae) and early blight (Alternaria solani). Compared with Russet Burbank and Ranger Russet, Alturas is less susceptible to corky ringspot and foliar and tuber infection by late blight (Phytophthora infestans). It also is less susceptible to tuber net necrosis and Fusarium dry rot than Russet Burbank, and is more resistant to common scab (Streptomyces scabies) than Ranger Russet. However, Alturas is more susceptible to infection by PVY and PVX than Ranger Russet. Total nitrogen application recommendations for Alturas are approximately 40% less than those for Russet Burbank. Alturas requires 15% to 20% more water during the growing season than does Russet Bur-bank.
    American Journal of Potato Research 09/2003; 80(5):295-301. DOI:10.1007/BF02854312 · 0.95 Impact Factor
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    ABSTRACT: The Agricultural Experiment Stations of Oregon, Idaho, and Washington and the U.S. Department of Agriculture jointly released Wallowa Russet in 2002. This late maturing variety is most suitable for frozen french fry use, but may find limited fresh market potential because of outstanding flavor and texture when baked. Wallowa Russet was evaluated as AO87277-6 in Oregon irrigated trials from 1993 through 1999, and in western regional trials from 1997 through 1999. Averaged over 13 locations in seven states, Wallowa Russet produced total yields of 55.6 mt/ha compared to 53.5 and 45.7 mt/ha for Russet Burbank and Russet Norkotah, respectively, and U.S. No.1 yields of 44.4 mt/ha compared to 30.7 and 36.0 mt/ha for Russet Burbank and Russet Norkotah. Specific gravity is consistently higher for Walowa Russet than for Russet Burbank and fry color is as light or lighter; sugar end development is less than that observed in Russet Burbank. Wallowa Russet is similar to Russet Burbank in susceptibility toVerticillium wilt, foliar early blight (Alternaria solani), and potato leafroll virus (PLRV). However, Wallowa Russet develops less net necrosis than Russet Burbank from PLRV infection. Wallowa Russet is more susceptible to common scab (Streptomyces scabies) than Russet Burbank. It has moderate resistance to potato virus Y (PVY). Tubers of Wallowa Russet are less susceptible to tuber infection and decay caused by potato late blight (Phytophthora infestans) than Russet Norkotah and Ranger Russet. Wallowa Russet has less hollow heart, brown center, blackspot bruise, and fewer growth cracks than Russet Burbank but is more susceptible to shatter bruise. Vitamin C is higher for Wallowa Russet (30.4 mg/100 g fresh weight) than for Russet Burbank (21.9) or Russet Norkotah (22.0), and protein content averaged 5.6% compared to 4.7% and 4.9% for Russet Burbank and Russet Norkotah, respectively. Las Estaciones Experimentales de Oregon, Idaho y Washington, y el Departamento de Agricultura de los Estados Unidos han liberado conjuntamente en el 2002 la variedad Wallowa Russet. Esta variedad de maduración tardía es más apropiada para su uso como papa frita congelada, pero además puede encontrar un mercado potencial limitado para su consumo fresco debido a su excelente sabor y textura cocido al horno. Wallowa Russet fue evaluada como AO87277-6 en pruebas bajo riego realizadas en Oregon desde 1993 hasta 1999 y en pruebas regionales de 1997 a 1999. En un promedio de 13 localidades en siete estados, Wallowa Russet dio rendimientos totales de 55.5 t/ha en comparación con 53.5 y 45.7 t/ha de Russet Burbank y Russet Norkotah. La gravedad específica es consistentemente más alta para Wallowa Russet que para Russet Burbank y el color de la fritura es tanto o más claro; el contenido de azúcares reductores es menor que el observado en Russet Burbank. Wallowa Russet y Russet Burbank son similares en susceptibilidad a la marchitez causada porVerticillium, al tizón temprano del follaje (Alternaria solani) y al virus del enrollamiento (PLRV). Sin embargo, Wallowa Russet desarrolla menos necrosis reticulada originada por la infección de PLRV que Russet Burbank. Wallowa Russet es más susceptible a la sarna común (Streptomyces scabies) que Russet Burbank. Tiene resistencia moderada al virus Y de la papa (PVY). Los tubérculos de Wallowa Russet son menos susceptibles a la infección y pudrición causados por el tizón tardío (Phytophthora infestans) que los de Russet Norkotah y Ranger Russet. Wallowa Russet presenta menos corazón vacío, corazón negro, magulladuras en forma de puntos y menor cantidad de grietas de crecimiento que Russet Burbank, pero es más susceptible a las lesiones con fisuras del tejido. El contenido de Vitamina C es mayor en Wallowa Russet (30.4 mg/100g de peso fresco) que en Russet Burbank (21.9) o Russet Norkotah (22.0), y un promedio de 5.6% de contenido de proteína comparado con 4.7% y 4.9% de Russet Burbank y Russet Norkotah respectivamente.
    American Journal of Potato Research 06/2003; 80(4):289-294. DOI:10.1007/BF02855365 · 0.95 Impact Factor
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    ABSTRACT: Modoc is an early maturing, red-skinned, whitefleshed potato cultivar for fresh market use. The Agricultural Experiment Stations of Oregon, North Dakota, California, Idaho, and Washington jointly released Modoc in 2003. Modoc was derived from a 1989 cross of ND1196-2R and ND2225-1R performed at North Dakota State University. Modoc retains bright skin color in storage and is suited for marketing directly from the field or storage. It produces slightly lower total yield than Red LaSoda or Dark Red Norland, but higher marketable yield and more desirable tuber size and shape. Modoc tubers seldom exhibit growth cracks, secondary growth, hollow heart or other external or internal defects. Dry matter content of Modoc tubers is similar to Dark Red Norland and Red LaSoda (18.9% compared to 18.8% and 17.7%, respectively). Culinary quality of Modoc was rated equal to Dark Red Norland and Red LaSoda for boiling and microwaving preparation methods. Modoc tubers are similar to standard varieties in sugar, vitamin C, and glycoalkaloid (4.5 mg/100 g) concentration. Modoc foliage clearly expresses PVY symptoms and has not demonstrated high susceptibility to viral or fungal diseases during a decade of seed production and evaluation. Modoc es un cultivar de papa de madurez precoz, piel roja y de uso en fresco. Las Estaciónes Experimentales de Oregon, North Dakota, California, Idaho y Washington han liberado conjuntamente el cultivar Modoc en el 2003. Modoc deriva de un cruzamiento de ND1196-2R y ND2225-1R realizado en la Universidad del Estado de North Dakota en 1989. Modoc retiene el color rojo brillante de la piel en almacenamiento y es apropiada para su comercialización directa a partir del campo o del almacén. Tiene rendimientos totales ligeramente menores que la Red LaSoda o la Dark Red Norland, pero mayor cantidad de tubérculos comercializables y de forma y tamaño preferidos. Los tubérculos de Modoc raramente exhiben rajaduras de crecimiento, crecimiento secundario, corazón vacío u otros defectos internos y externos. El contenido de materia seca de Modoc es similar al de Dark Red Norland y Red LaSoda (18.9 comparado con 18.8 y 17.7 por ciento, respectivamente). Las cualidades culinarias de Modoc son iguales a las de Dark Red Norland y Red LaSoda para hervido y métodos de preparación en microondas. Los tubérculos de Modoc son similares a los de las variedades estándar en la concentración de azúcares, vitamina C y glicoalcaloides (4.5 mg/100 g). El follaje de Modoc muestra claramente síntomas de PVY pero no ha demostrado alta susceptibilidad a enfermedades virales o fungosas durante la década de producción y evaluación de semilla.
    American Journal of Potato Research 06/2003; 80(4):235-240. DOI:10.1007/BF02855359 · 0.95 Impact Factor
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    ABSTRACT: Ivory Crisp was released in 2002 by the experiment stations of Idaho, Oregon, Washington, and North Dakota, and by the USDA/ARS. It resulted from a 1980 cross of ND292-1 and A77268-4. Ivory Crisp is suited for use in both the direct delivery and storage chipping markets. Ivory Crisp is a medium-maturing potato variety with round, white tubers and excellent chipping quality. It has medium to high yield potential, high tuber solids, resistance to most internal and external tuber defects, and the ability to chip from cold storage. In trials in Idaho, Oregon, and Washington, total and U.S. No. 1 tuber yield of Ivory Crisp was similar to Atlantic but lower than Chipeta. Yield of tubers in the size range 113-336 g for Ivory Crisp is higher than for either Atlantic or Chipeta. Ivory Crisp is resistant to growth cracks, secondary growth, hollow heart, and stem-end necrosis, but susceptible to shatter bruise. Tuber sugar content has consistently remained low following cold storage and near-acceptable chip color retained at 4.4 C. Ivory Crisp is susceptible or moderately susceptible to most common field diseases of potato. It is highly susceptible to common scab, powdery scab, and pink rot. Tubers of Ivory Crisp have dry matter content (22.4%) lower than those of Atlantic, but higher than those of Chipeta. Glycoalkaloid content of Ivory Crisp tubers is very low (4.3 mg 100 g.1). An application for Plant Variety Protection has been filed for Ivory Crisp. Seed is available from potato seed growers in Idaho, North Dakota, and Canada. Small amounts of seed, for research purposes, can be obtained by contacting the corresponding author.
    American Journal of Potato Research 04/2003; 80(3). DOI:10.1007/BF02855692 · 0.95 Impact Factor
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    ABSTRACT: Bannock Russet, a late-maturing, long russet potato cultivar, was released in 1999 by the USDA-ARS and the experiment stations of Idaho, Oregon, and Washington. It is suitable for processing into french fries and other frozen products. Its attractive russeted skin and excellent culinary qualities also make it suitable for fresh market. Bannock Russet, in comparisons with Russet Burbank, has consistently produced greater U.S. No. 1 yields in trials conducted throughout southern Idaho. In other western trial sites, total yields of Bannock Russet have been comparable to or smaller than that of Russet Burbank, but its percentage of undersize and cull potatoes is consistently less. Bannock Russet is resistant to potato virus Y (PVY), Verticillium wilt, common scab, and leafroll net necrosis. It also has moderate resistance to early blight (foliar and tuber) andErwinia soft rot. With respect to other potato diseases/disorders, Bannock Russet’s level of susceptibility is similar to that of Russet Burbank; the exception being shatter bruise, with Bannock Russet displaying a greater susceptibility. Cultural management guidelines have been developed to minimize shatter bruise in Bannock Russet. Bannock Russet’s multiple disease resistances coupled with its low nitrogen requirement, make it a low-input cultivar that could significantly reduce growers’ production costs. Bannock Russet, un cultivar de papa de maduración tardía, alargado y rojizo, fue liberado en 1999 por USDA-ARS y las estaciones experimentales de Idaho, Oregón y Washington. Es adecuado para el procesamiento de papas fritas a la francesa y otros productos congelados. Su atractiva piel rojiza y sus excelentes cualidades culinarias lo hacen igualmente adecuado para el mercado fresco. En los ensayos realizados en todo el sur de Idaho, en comparación con Russet Burbank, la variedad Bannock Russet sistemáticamente ha obtenido el primer lugar en rendimiento de los Estados Unidos. En otros campos de prueba del oeste, los rendimientos totales de Bannock Russet han sido equivalentes o más bajos que los de Russet Burbank, pero el porcentaje de papas con tamaño insuficiente y de desecho es notablemente menor. Bannock Russet es resistente al virus Y de la papa (PVY), a la verticilosis, sarna común y a la necrosis reticulada de enrollamiento de la papa. También posee resistencia moderada al tizón temprano (foliar y tubérculo) y a la pudrición blanda por Erwinia. Respecto a otras enfermedades o transtornos de la papa, el nivel de susceptibilidad es similar al de Russet Burbank, con excepción de que Bannock Russet es más proclive a que se produzcan magulladuras con rotura de la piel del tubérculo. Las pautas de manejo cultural han sido desarrolladas para reducir al mínimo dichas magulladuras en Bannock Russet. La múltiple resistencia a enfermedades de este cultivar se aúna a su bajo requerimiento de nitrógeno, que convierte a Bannock Russet en un cultivar de baja inversión que puede reducir significativamente los costos de productión de los agricultores.
    American Journal of Potato Research 02/2002; 79(2):147-153. DOI:10.1007/BF02881524 · 0.95 Impact Factor
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    ABSTRACT: IdaRose is a late-maturing, potato variety with round, dark red tubers. It has high yield potential and exceptionally long tuber dormancy. IdaRose was released in 2000 by the USDA/ARS and the experiment stations of Idaho, Oregon, and Washington. It resulted from a 1982 cross of Sangre and TXA218-7. IdaRose is suited for use in both the early summer and storage fresh markets. Tuber yield of IdaRose is higher than that of Dark Red Norland and Sangre. It has yield potential similar to or slightly lower than Red LaSoda. Tubers of IdaRose have good internal and external quality. Culinary quality of boiled, baked, and micro-waved IdaRose tubers is excellent. It has moderate resistance to growth cracks, hollow heart, and other defect problems. IdaRose is susceptible or moderately susceptible to most common field diseases of potato. Tubers of IdaRose have dry matter content (19.2%) similar to other standard red varieties, and have a relatively high concentration of sugars and low concentration of glycoalkaloids (2.4 mg/100 g).
    American Journal of Potato Research 02/2002; 79(2):79-84. DOI:10.1007/BF02881516 · 0.95 Impact Factor
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    ABSTRACT: Gem Russet, a new medium maturing, long russet potato variety, was released in 2000 by the USDA/ARS and the experiment stations of Idaho, Oregon, and Washington. It is suited for use in the fresh, frozen-fried processing, and dehydration markets. Total tuber yield of Gem Russet is similar to that of Russet Burbank when grown in eastern Idaho, but lower when grown in the long-season areas of western Idaho and the Columbia Basin of Oregon and Washington. U.S. No. 1 yield is consistently higher that that of Russet Burbank. Tubers of Gem Russet have good processing and baked quality. Gem Russet is resistant to most external and internal physiological defects, including second growth, growth cracks, shatter bruise, and hollow heart. It is moderately susceptible to blackspot bruise. Gem Russet shows extreme resistance to potato virus X, resistance to common scab, and moderate resistance to early dying. Biochemical analysis of Gem Russet tubers has shown higher solids, lower reducing sugar and glycoalkaloid content, and higher concentration of protein and vitamin C when compared with tubers of Russet Burbank.
    American Journal of Potato Research 01/2002; 79(1):25-31. DOI:10.1007/BF02883520 · 0.95 Impact Factor
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    ABSTRACT: Klamath Russet, a late-maturing cultivar for fresh market use, was jointly released by the Agricultural Experiment Stations of Oregon, Idaho, and Washington and the U.S. Department of Agriculture in 2000. Klamath Russet was tested in irrigated trials in Oregon from 1990 to 1999 and in Western Regional Trials from 1994 to 1996. Klamath Russet yields of U.S. #ls have exceeded those for Russet Burbank and Russet Norkotah by more than 30%, averaged across all trials. Klamath Russet is moderately resistant to Verticillium wilt and highly resistant to common scab. Specific gravity for Klamath Russet has averaged 1.076 across all trials compared with 1.070 and 1.081 for Russet Norkotah and Russet Burbank, respectively. Klamath Russet is not considered suitable for french fry production because of high sugar and low starch contents.
    American Journal of Potato Research 09/2001; 78(5):377-381. DOI:10.1007/BF02884347 · 0.95 Impact Factor