D.P. Zhang's research while affiliated with North Carolina State University and other places

Publications (13)

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Features Emphasizes the impact of molecular genetics/genomics on plant breeding Provides new information and perspectives resulting from publication of the first entire plant genome sequence Includes chapters authored by researchers from respected laboratories around the world Summary The last few years have seen an explosion of new information and...
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When sweetpotato chlorotic stunt crinivirus (SPCSV) and sweetpotato feathery mottle potyvirus (SPFMV) infect sweetpotato [Ipomoea batatas (L.) Lam.], they interact synergistically and cause sweetpotato virus disease (SPVD), a major constraint to food productivity in east Africa. The genetic basis of resistance to these diseases was investigated in...
Article
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Ugandan farmers grow many landrace sweetpotato varieties, but some of these are relatively low yielding and susceptible to pests. The objective of the present research was to involve farmers in a large-scale assessment of Ugandan farmers’ varieties to rapidly identify those with superior yield performance, pest resistance and consumer acceptance. O...
Article
Identification of duplicates is essential for clonally propagated crop genebank management. The sensitivity and efficiency of Random Amplified Polymorphic DNA (RAPD) for duplicate identification in sweet potato was assessed in this study. The intervarietal variation in sweet potato was easily revealed by RAPD analysis. A combination of a few inform...
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Sweetpotato (Ipomoea batatas (L.) Lam.) was originally domesticated in tropical America. The sweetpotato gene bank maintained at CIP now contains 5526 cultivated accessions from 57 countries, of which 2589 are from Latin America. Understanding the diversity in the distribution of this germplasm is essential for its rational management and use. In t...
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Although originally domesticated in tropical America, the sweetpotato (Ipo- moea batatas (L.) Lam.) has a long cultivation history in Oceania. While the post-Columbus dispersal of sweetpotato to Asia and Oceania is well docu- mented, the hypothesis that there was prehistoric transfer by Peruvian or Polynesian voyagers from Peru to Oceania has long...
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Genebank collection databases can be used for ecogeographical studies under the assumption that the accessions are a geographically unbiased sample. We evaluated the representativeness of a collection of wild potatoes from Bolivia and defined and assessed four types of bias: species, species-area, hotspot, and infrastructure. Species bias is the sa...
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The sweetpotato feathery mottle virus (SPFMV) is a member of the potyvirus genus of the Family Potyviridae. SPFMV is economically important as one of the causal components of sweetpotato virus disease (SPVD). Developing resistance to SPFMV is essential for the control of SPVD using resistant varieties. A novel approach to controlling sweetpotato po...
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Euscepes postfasciatus is one of the most important sweetpotato pests in the South Pacific, Caribbean basin, and some countries of Central and South America. Development of host resistance will greatly improve the effects of integrated pest management (IPM) for this pest. Ten transgenic clones of `Jewel' sweetpotato with cowpea trypsin inhibitors a...
Article
Detecting inter- and intra-varietal variation is essential for the management of a plant germplasm bank. The sensitivity and efficiency of randomly amplified polymorphic DNA (RAPD) for cultivar identification and somaclonal mutation in sweetpotato were evaluated. RAPD demonstrated a highly significant inter-varietal variation. Every one of the 23 t...

Citations

... KTIs from the passion fruit displayed activity against midgut serine and cysteine proteases from the sugarcane borer Diatraea saccharalis and the coleopteran Callosobruchus maculatus on artificial diets (Botelho-Junior et al., 2014). In addition, the heterologous expression of a good number of KTIs in poplar, sweet corn, potato, rice, tobacco, and tomato conferred resistance to lepidopteran (Confalonieri et al., 1998;Cipriani et al., 1999;Gatehouse et al., 1999;Lee et al., 1999;McManus et al., 1999;Nandi et al., 1999;Marchetti et al., 2000;Rufino et al., 2013;Guimarães et al., 2015), coleopteran (Major and Constabel, 2008) and acari (Castagnoli et al., 2003). Likewise, serine-PIs from other different families overexpressed in several plant species have conferred resistance to lepidopteran, coleopteran, homopteran (reviewed in Diaz and Santamaria, 2012) and acari . ...
... These problems have been handled by developing SSR markers that present large size differences for detection in agarose gels and multiplexing several markers in a single reaction (Collard and Mackill, 2008;Korzun, 2003). SSR markers exhibit high levels of polymorphism, and several such markers have been developed for sweet potato (Jarret and Bowen, 1994;Buteler et al., 1999;Hu et al., 2004) and used successfully for determining the genetic relationship between cultivars derived from hybrid or polycross breeding programs and for analyzing the genetic diversity of Latin American and East African sweet potato landraces (Zhang et al., 2001;Gichuru et al., 2006). Understanding this genetic diversity is important to the establishment of conservation efforts and to warrant the adequate use of the germplasm. ...
... This differed between the different viruses with the variety recording more SPCSV incidences than SPFMV and SPLCV. Genetic makeup of a variety has been reported to influence susceptibility to viruses (Mwanga et al., 2002). Varieties that have a level of resistance to sweet potato viruses have been reported to have minimal yield increase from clean seed (Valverde et al., 2007). ...
... Pyramiding (stacking) multiple defence genes in one plant has been developed as a method to prevent pest resistance and to improve pest control. Plants co-expressing a combination of enzyme inhibitors or combining them with transgenically expressed Bt toxins, lectins and thionins have enhanced plant resistance against insects when compared to plants that expressed the individual genes2021222324. Based on this approach, rice lines expressing Cry1Ac and the cowpea trypsin inhibitor CpTI are awaiting approval of biosafety certificates for their release/ exploitation as commercial resistant plants in China [25]. ...
... The initial genetic map, constructed in 1997 (Ukoskit and Thompson, 1997), served as the basis for subsequent genetic studies that resulted in the identification of a series of agriculturally important traits. This was accomplished using various approaches, such as mapping of quantitative trait loci (QTLs) (Mwanga et al., 2002;da Silva Pereira et al., 2020), application of bulked segregant analysis (BSA) (Nakayama et al., 2012;Suematsu et al., 2021;Yamakawa et al., 2021), and genome-wide association studies (GWASs) (Zhang et al., 2016;Okada et al., 2019;Chen et al., 2021). A genome sequencing project was formally initiated in 2012. ...
... La batata fue introducida en Europa Occidental desde las Indias Occidentales después del primer viaje de Colón en 1492. En el siglo XVI, los portugueses exploradores transfirieron la batata a África, India, Sudeste Asia y las Indias Orientales, mientras que la transferencia directa de la planta fue hecha por galeones comerciales españoles desde México hasta Filipinas (Rossel et al., 2000). ...
... In recent years, simple sequence repeat (SSR) markers or microsatellites have become the most widely used molecular marker technologies for the study of both animals and plants (Shih et al., 2002;Veasey et al., 2008;Zhang et al., 2001;Karuri et al., 2010;Yada et al., 2010;Li et al., 2009). Multi-allelic, highly polymorphic, highly reproducible, codominant SSR markers give extensive genetic information with good genome coverage (Kawuki et al., 2009;Sree et al., 2010). ...
... Sweet potato (Ipomoea batatas (L.) Lam.), a herbaceous dicot of the Convolvulaceae family, is widely grown throughout the subtropics and warm temperate regions. The tuberous root of sweet potato is used as a food, animal feed, and material of industrial production in many countries (Woolfe 1992;Hijmans et al. 2001). The Food and Agriculture Organization of the United Nations (FAO) has estimated the world sweet potato production at 112,835,316 tones, of which 70.5% is in Asia. ...
... (2014) In sweet potato, Ngoc et al. (2015) demonstrated the expression of cry8Db from Bacillus thuringiensis using Agrobacterium-mediated transformation for enhanced resistance to insect pests. Previously, Cipriani et al. (2001) overexpressed oryzacystatin-1 (OC1) from rice in sweet potato for imparting resistance to Sweet potato feathery mottle virus. Later, Gao, Yu, et al. (2011 showed that the OC1 overexpression lines are also resistant to the stem nematodes. ...
... The main root and tuber food crops include cassava (Manihot esculenta), Potato (Solanum tuberosum), Taro (colocaseae esculenta), Sweet potatoes (Impomoea batatus) which reproduce in vegetative [1]. They are major starch sources comprising a botanically diverse group of starchy staples that are very important for food and agriculture [2]. These crops are indispensible in ensuring food security providing high yield as compared to cereal crops [3]. ...