Research progress in BYDV resistance genes derived from wheat and its wild relatives

Zhang, Zengyan; Lin, Zhishan; Zhao, Xiaohui

doi:10.1016/s1673-8527(08)60148-4

Cited by 48 publications

(37 citation statements)

References 33 publications

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“…A disruption of virus-host recognition, which could be caused by the presence of a tolerance or resistance gene in the host genome, can inhibit viral infection [66]. While some tolerance and resistance sources have been identified in wild relatives of cultivated grasses [67], [68], [69], these have been very limited in number. Our results suggest that their presence in the six host species selected in this study and impact on virus prevalence would be a fruitful avenue for future investigation.…”

Section: Discussionmentioning

confidence: 99%

Richness and Composition of Niche-Assembled Viral Pathogen Communities

et al. 2013

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The pathogen and parasite community that inhabits every free-living organism can control host vital rates including lifespan and reproductive output. To date, however, there have been few experiments examining pathogen community assembly replicated at large-enough spatial scales to inform our understanding of pathogen dynamics in natural systems. Pathogen community assembly may be driven by neutral stochastic colonization and extinction events or by niche differentiation that constrains pathogen distributions to particular environmental conditions, hosts, or vectors.Here, we present results from a regionally-replicated experiment investigating the community of barley and cereal yellow dwarf viruses (B/CYDV's) in over 5000 experimentally planted individuals of six grass species along a 700 km latitudinal gradient along the Pacific coast of North America (USA) in response to experimentally manipulated nitrogen and phosphorus supplies. The composition of the virus community varied predictably among hosts and across nutrient-addition treatments, indicating niche differentiation among virus species. There were some concordant responses among the viral species. For example, the prevalence of most viral species increased consistently with perennial grass cover, leading to a 60% increase in the richness of the viral community within individual hosts (i.e., coinfection) in perennial-dominated plots. Furthermore, infection rates of the six host species in the field were highly correlated with vector preferences assessed in laboratory trials. Our results reveal the importance of niche differentiation in structuring virus assemblages. Virus species distributions reflected a combination of local host community composition, host species-specific vector preferences, and virus responses to host nutrition. In addition, our results suggest that heterogeneity among host species in their capacity to attract vectors or support pathogens between growing seasons can lead to positive covariation among virus species.

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Section: Discussionmentioning

confidence: 99%

Richness and Composition of Niche-Assembled Viral Pathogen Communities

et al. 2013

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“…A number of genes for resistance to various diseases have been introgressed into wheat from related species through interspecific hybridization and chromosome engineering (Chen et al 1995, Colmer et al 2006, Zhang et al 2009. Genes for high nitrogen and phosphorus efficiency in wheat relatives have been successfully introduced into wheat (Subbarao et al 2007, Wang et al 2010, so screening wheat relatives for genes controlling high grain Fe and Zn concentrations and introgressing these genes into cultivated wheat Communicated by N. Mori Received December 28, 2010.…”

Section: Introductionmentioning

confidence: 99%

Wheat-Aegilops chromosome addition lines showing high iron and zinc contents in grains

et al. 2011

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Deficiencies of iron (Fe) and zinc (Zn) in afflict over three billion people worldwide, and deficiencies of these minerals in soil also limit crop production in one-third (Fe) and nearly half (Zn) of the world's total cereal growing area. Screening genetic resources for improving wheat grain Fe and Zn contents and efficiency can contribute to both human health and crop production. We evaluated 47 wheat-Aegilops disomic addition lines derived from 6 Aegilops species to identify the chromosomes carrying genes for high grain Fe and Zn concentrations. Addition lines with chromosomes 1S l and 2S l of Ae. longissima, 1S S and 2S S of Ae. searsii, 2U and 6U of Ae. umbellulata, B of Ae. caudata, 4S v of Ae. peregrina, and 5 M g of Ae. geniculata showed increased grain Fe or Zn concentration of between 50% and 248% compared with the recipient cultivar, Chinese Spring. Most of alien chromosomes addition lines with significantly higher grain Fe and/or Zn concentrations belonged to the U and S genotypes and homoeologous groups 1 and 2 chromosomes. These lines could be used for the precise introgression of genes into elite wheat cultivars to improve wheat micronutrient concentrations.

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“…elongatum (diploid) and the St genome from Pseudoroegneria strigosa. Research has shown a range of Thinopyrum species carry genetic variation for a range of agronomically important traits including salinity tolerance (Dvorák et al 1988;Colmer et al 2006), perennial growth habit (Lammer et al 2004), water logging tolerance (Taeb et al 1993), improved photosynthetic capacity (Reynolds et al 2001), resistance to a wide range of diseases (Friebe et al 1996;Zhang et al 2009;Fu et al 2012;Li et al 2017) and improved flour quality (Tanaka et al 2017). Research has also shown a close relationship between the genomes of wheat and Th.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Exploiting the genome of Thinopyrum elongatum to expand the gene pool of hexaploid wheat

et al. 2020

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Key message One hundred and thirty four introgressions from Thinopyrum elongatum have been transferred into a wheat background and were characterised using 263 SNP markers. Abstract Species within the genus Thinopyrum have been shown to carry genetic variation for a very wide range of traits including biotic and abiotic stresses and quality. Research has shown that one of the species within this genus, Th. elongatum, has a close relationship with the genomes of wheat making it a highly suitable candidate to expand the gene pool of wheat. Homoeologous recombination, in the absence of the Ph1 gene, has been exploited to transfer an estimated 134 introgressions from Th. elongatum into a hexaploid wheat background. The introgressions were detected and characterised using 263 single nucleotide polymorphism markers from a 35 K Axiom ® Wheat-Relative Genotyping Array, spread across seven linkage groups and validated using genomic in situ hybridisation. The genetic map had a total length of 187.8 cM and the average chromosome length was 26.8 cM. Comparative analyses of the genetic map of Th. elongatum and the physical map of hexaploid wheat confirmed previous work that indicated good synteny at the macro-level, although Th. elongatum does not contain the 4A/5A/7B translocation found in wheat.

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Research progress in BYDV resistance genes derived from wheat and its wild relatives

Cited by 48 publications

References 33 publications

Richness and Composition of Niche-Assembled Viral Pathogen Communities

Richness and Composition of Niche-Assembled Viral Pathogen Communities

Wheat-Aegilops chromosome addition lines showing high iron and zinc contents in grains

Exploiting the genome of Thinopyrum elongatum to expand the gene pool of hexaploid wheat

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