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Genome wide association analyses for drought tolerance related traits in barley (Hordeum vulgare L.)

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Relation http://oar.icrisat.org/4456/
http://dx.doi.org/10.1016/j.fcr.2011.10.008
 
Title Genome wide association analyses for drought tolerance related traits in barley (Hordeum vulgare L.)
 
Creator Varshney, R K
Paulo, M J
Grando, S
Eeuwijk, F A van
Keizer, L C P
Ceccarelli, S
Kilian, A
Baum, M
Graner, A
 
Subject Genetics and Genomics
 
Description Genome wide association (GWA) analysis of yield, yield components, developmental, physiological and anatomical traits was conducted for a barley germplasm collection consisting of 185 cultivated (Hordeum vulgare L.) and 38 wild (Hordeum spontaneum L.) genotypes, originating from 30 countries of four continents. Phenotypic evaluations were performed at a dry (Breda) and wet (Tel Hadya) location in Syria. Genome wide association study was done with 816 markers comprised of 710 diversity array technology (DArT), 61 single nucleotide polymorphism (SNP) and 45 microsatellite or simple sequence repeat (SSR) markers. Diversity analysis revealed 5 groups of germplasm, related to origin (Middle East, North Africa), structural information (two-rows), and domestication (wild versus domesticated). Linkage disequilibrium (LD) decayed after 3 cM with a few exceptions at 10 and 15 cM. Although a few QTLs were identified that differed between the dry and wet site, these QTLs explained low phenotypic variation and could not unequivocally be related to drought tolerance when compared to earlier linkage mapping based QTL analysis studies. Therefore, GWA analysis seems to be not very effective for identification of major QTLs for complex traits like drought tolerance in highly structured germplasm collections.
 
Publisher Elsevier
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4456/1/FCR126_171-180_2012.pdf
Varshney, R K and Paulo, M J and Grando, S and Eeuwijk, F A van and Keizer, L C P and Ceccarelli, S and Kilian, A and Baum, M and Graner, A (2012) Genome wide association analyses for drought tolerance related traits in barley (Hordeum vulgare L.). Field Crops Research, 126 (1). 171-180 . ISSN 0378-4290