F. J. Quiroz

F. J. Quiroz
Instituto Nacional de Innovacion y Transferencia en Tecnologia Agropecuaria | INTA · Departamento de Producción Vegetal

About

37
Publications
3,634
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
282
Citations

Publications

Publications (37)
Poster
Downy mildew (DM) of sunflower is a devastating disease caused by Plasmopara halstedii (Farl.) Berl. and de Toni. In Argentina, the prevalence and incidence of DM has increased in the last decade. The present study: i) compiles information from private and public organisms to assess the race spectrum of DM and its evolution during the last three de...
Article
Ramularia leaf spot (RLS) caused by the fungus Ramularia collo-cygni (Rcc) has become a threat to barley production in Argentina. All barley varieties are susceptible to RLS; thus, disease management relies on fungicides like quinone-outside inhibitors (QoIs), demethylation inhibitors (DMIs) and succinate dehydrogenase inhibitors (SDHIs). Europe re...
Conference Paper
Full-text available
a) Race determination of P. halstedii isolates Fig. 1. A= recovery of inoculum at field B= detail of leaf sporulation C= spore solution D= reinfection of differential set of sunflower inbred lines E= phenotyping and race determination. b) SSR analysis The isolates were analyzed by eight loci SSR. The number of alleles per locus (APL), the expected...
Preprint
Full-text available
Sunflower Verticillium Wilt and Leaf Mottle (SVW), caused by Verticillium dahliae (Kleb.; Vd ), is a soil-borne disease affecting sunflower worldwide. A single dominant locus, known as V1, was formerly effective in controlling North-American Vd races, whereas races from Argentina, Europe and an emerging race from USA overcome its resistance. This e...
Poster
Full-text available
One of the most prevalent foliar diseases in barley is net blotch spot form (NBSF), caused by the fungus Drechslera teres f sp teres. Seed, stubble, and alternative hosts (mostly grasses) are the main sources of inoculum of this disease varying in importance according to crop conditions. Currently, new seed-coated fungicides (FC) with carboxamides...
Poster
Full-text available
Oxathiapiprolin is an oomicide with a mechanism of action not previously used in Argentina. The objective was to determine the baseline sensitivity of Plasmopara halstedii isolates to oxathiapiprolin applied to sunflower seeds. Materials: isolates from Buenos Aires (5), Santa Fe (11) and Chaco (2), susceptible hybrid seeds DK4065. Treatments: 0 (Co...
Poster
Full-text available
Metalaxil-m ha sido históricamente el ingrediente activo más efectivo para el control de Plasmopara halstedii en girasol. Existen registros de pérdidas de sensibilidad de diferentes aislamientos en la Argentina. El objetivo fue determinar la sensibilidad de aislamientos de Plasmopara halstedii a metalaxil-m de regiones productoras de girasol de Arg...
Article
Full-text available
Sclerotinia head rot (SHR), caused by the necrotrophic fungus Sclerotinia sclerotiorum, is one of the most devastating sunflower crop diseases. Despite its worldwide occurrence, the genetic determinants of plant resistance are still largely unknown. Here, we investigated the Sclerotinia-sunflower pathosystem by analysing temporal changes in gene ex...
Article
Full-text available
Sclerotinia head rot (SHR), caused by the necrotrophic fungus Sclerotinia sclerotiorum, is one of the most devastating sunflower crop diseases. Despite its worldwide occurrence, the genetic determinants of plant resistance are still largely unknown. Here, we investigated the Sclerotinia-sunflower pathosystem by analysing temporal changes in gene ex...
Article
Full-text available
Sunflower is usually affected by white rot (WR), a disease produced by Sclerotinia sclerotiorum . Thus, breeders select WR resistant hybrids by means of field experiments replicated in different environments. The WR selection will be effective when the correlation between the phenotype and the set of genes controlling the trait is high. This study...
Article
The objective of this work was to find practical procedures to overcome methodological drawbacks encountered during studies on sunflower downy mildew. Techniques for recovering living isolates of Plasmopara halstedii from the field and for the preservation of infected leaf samples for further molecular analysis were developed. A Polymerase Chain Re...
Article
Full-text available
Stem base canker caused by Leptosphaeria maculans (SBC) has been reported to affect canola production worldwide. Ascospores infections produce leaf spots (LS) in early vegetative stages. From these initial spots, the fungus grows towards the stem crown and may cause SBC, lodging and premature ripening at maturity. Growth stage at LS presence, culti...
Article
Phoma black stem (BS), caused by Leptosphaeria lindquistii (synonymous Phoma macdonaldii Boerema) is an endemic disease of sunflower in Argentina and occurs worldwide. The expression of some diseases is related to the translocation of photosynthates during grain fill, which in turn is related to the source to sink ratio (SSr). The aim of this study...
Article
Full-text available
Sclerotinia head rot (SHR) is one of the most serious constraints to sunflower (Helianthus annuus L. var. macrocarpus) production worldwide. Here, we evaluated the response to SHR in a sunflower inbred panel from a large INTA germplasm collection, consisting of 137 inbred lines (ILs). Field trials were performed over five consecutive seasons using...
Thesis
Las variaciones en el peso de granos de trigo tienen efecto en su posterior uso en la industria molinera.El peso hectolítrico permite establecer la calidad comercial del trigo, fijar el precio, estimar capacidades de almacenamiento y particularmente está asociado con el comportamiento molinero y la calidad industrial. Se trató de determinar el efec...
Poster
Full-text available
Desde 2013 se observa un incremento de mildiu de girasol por Plasmopara halstedii en SE de Bs As y N de Santa Fé. Esto se atribuye a cambios genéticos del patógeno que confirieron tolerancia al curasemilla metalaxyl y/o superaron algunos genes Pl de resistencia de los híbridos cultivados. Ante este problema, se ha conformado una red compuesta por e...
Poster
Full-text available
Plasmopara halstedii es un oomycete causante de una de las principales enfermedades del girasol, conocida como enanismo o mildiu. El uso de fungicidas curasemilla es una de las principales herramientas para su manejo. La aparición de variantes de P. halstedii tolerantes a metalaxil, ingrediente activo mayormente utilizado como curasemilla, hace nec...
Conference Paper
Full-text available
Sunflower Downy Mildew in Argentina: State of art, fungicide resistance and disease management.
Article
Full-text available
Las limitantes más importantes del cultivo de cebada para la región del sur bonaerense son la nutrición mineral y las enfermedades foliares, dos factores que inciden directamente sobre el rendimiento y calidad comercial del grano. Dentro de las enfermedades más prevalentes podemos enumerar dos grandes grupos, las enfermedades de suelo y las foliare...
Technical Report
Full-text available
Las enfermedades fúngicas causan pérdidas de rendimiento y de calidad en los granos de cebada, especialmente en las cebadas con destino a cervecería. Existe un número acotado de variedades con destino a cervecería, de las cuales en mayor o menor medida son susceptibles, al menos a alguna de las principales enfermedades que afectan a este cultivo. P...
Article
Full-text available
Sclerotinia Head Rot (SHR) is one of the most damaging diseases of sunflower in Europe, Argentina, and USA, causing average yield reductions of 10 to 20 %, but leading to total production loss under favorable environmental conditions for the pathogen. Association Mapping (AM) is a promising choice for Quantitative Trait Locus (QTL) mapping, as it d...
Article
Full-text available
The parasitic weed Orobanche cumana Wallr. (broomrape) is one of the major limiting factors in worldwide sunflower production. However, it is absent in the centre of origin and in the sunflower crop areas of América. It has not yet been elucidated if O. cumana naturalization in sunflower habitats in Argentina is restricted as a result of either abi...
Article
Biodiesel is an alternative fuel made from vegetable oils or animal fats. The fatty acid composition of the feedstock, which varies among and within species, is the main determinant of biodiesel quality. In this work we analyze the variability in biodiesel quality (density, kinematic viscosity, heating value, cetane number and iodine value) obtaine...
Article
From 2001 to 2006 crop seasons three field experiments were run to compare the effect of no tillage (NT) vs. conventional tillage (CT) on Verticillium wilt of sunflower. One experiment had sunflower monocropping (SM) and the others the sequence wheat–sunflower (WS) with 6 years of fescue pasture or seven WS cycles as previous crops. All experimenta...
Article
On the basis of known sunflower (Helianthus annuus L.) responses to soil water deficit, it is proposed that the effect of the fungus Verticillium dahliae Klebahn on plant leaf area precedes and is greater than its effect on leaf photosynthesis and stomatal conductance. To test this hypothesis, we measured shoot and leaf area growth, leaf photosynth...
Article
We propose that sunflower yield is negatively associated with responsiveness to intraspecific competition but that this relationship can be affected by fungal diseases. This hypothesis was tested in environments where Sclerotinia head rot (Sclerotinia sclerotiorum (Lib.) de Bary) and Verticillium wilt (Verticillium dahliae Klebahn) were the prevale...
Conference Paper
Full-text available
Dissecting the genetic basis of agronomic traits is of primary importance in plant breeding. In this study, we combined an association mapping (AM) approach with biparental QTL mapping to study the genetic basis underlying natural resistance to Slerotinia sclerotiorumhead rot (SHR) in sunflower, an important fungal disease affecting commercial sunf...

Network

Cited By

Projects

Projects (2)
Project
To know the genetics of the current races of the pathogen in Argentina. Do a survey of the curent pathotypes and a molecular characterization using tools like sequencing.