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Genome-wide association analysis of Mexican bread wheat landraces for resistance to yellow and stem rust

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Title Genome-wide association analysis of Mexican bread wheat landraces for resistance to yellow and stem rust
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Creator Not Available
Prashant Vikram, Deepmala Sehgal, Achala SharmaI, Sridhar Bhavani, Priyanka Gupta , Mandeep Randhawa , Neftali Pardo , Daisy Basandra , Puja Srivastava , Sanjay Singh , Tanvi Sood , Carolina Paola Sansaloni , Hifzur Rahman , Sukhwinder Singh
 
Subject research papers
 
Description Not Available
Deploying under-utilized landraces in wheat breeding has been advocated to accelerate
genetic gains in current era of genomics assisted breeding. Mexican bread wheat landraces
(Creole wheats) represent an important resource for the discovery of novel alleles including
disease resistance. A core set of 1,098 Mexican landraces was subjected to multi-location
testing for rust diseases in India, Mexico and Kenya. The landrace core set showed a continuous variation for yellow (YR) and stem rust (SR) disease severity. Principal component
analysis differentiated Mexican landraces into three groups based on their respective collection sites. Linkage disequilibrium (LD) decay varied from 10 to 32 Mb across chromosomes
with an averge of 23Mb across whole genome. Genome-wide association analysis revealed
marker-trait associations for YR resistance in India and Mexico as well as for SR resistance
in Kenya. In addition, significant additive-additive interaction effects were observed for both
YR and SR resistance including genomic regions on chromosomes 1BL and 3BS, which colocate with pleiotropic genes Yr29/Lr46/Sr58/Pm39/Ltn2 and Sr2/Yr30/Lr27, respectively.
Study reports novel genomic associations for YR (chromosomes 1AL, 2BS, and 3BL) and
SR (chromosomes 2AL, 4DS, and 5DS). The novel findings in Creole wheat landraces can
be efficiently utilized for the wheat genetic improvement.
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Date 2021-07-28T06:31:29Z
2021-07-28T06:31:29Z
2021-01-29
 
Type Research Paper
 
Identifier 02
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http://krishi.icar.gov.in/jspui/handle/123456789/50584
 
Language English
 
Relation Not Available;
 
Publisher PLOS