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

R.K. Varshney; M.J. Paulo; S. Grando; F.A. van Eeuwijk; L.C.P. Keizer; P. Guo; S. Ceccarelli; A. Kilian; M. Baum; A. Graner

doi:10.1016/j.fcr.2011.10.008

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

Journal article

Peer reviewed

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

R.K. Varshney, M.J. Paulo, S. Grando, F.A. van Eeuwijk, L.C.P. Keizer, P. Guo, S. Ceccarelli, A. Kilian, M. Baum and A. Graner

Field Crops Research, Vol.126, pp.171-180

2012

DOI: https://doi.org/10.1016/j.fcr.2011.10.008

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Abstract

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.

Details

Title: Genome wide association analyses for drought tolerance related traits in barley (Hordeum vulgare L.)
Authors/Creators: R.K. Varshney (Author/Creator) - Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK)
M.J. Paulo (Author/Creator) - Wageningen University & Research
S. Grando (Author/Creator) - International Center for Agricultural Research in the Dry Areas
F.A. van Eeuwijk (Author/Creator) - Wageningen University & Research
L.C.P. Keizer (Author/Creator) - Wageningen University & Research
P. Guo (Author/Creator) - International Center for Agricultural Research in the Dry Areas
S. Ceccarelli (Author/Creator) - International Center for Agricultural Research in the Dry Areas
A. Kilian (Author/Creator) - ACT
M. Baum (Author/Creator) - International Center for Agricultural Research in the Dry Areas
A. Graner (Author/Creator) - Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK)
Publication Details: Field Crops Research, Vol.126, pp.171-180
Publisher: Elsevier BV
Identifiers: 991005541729307891
Copyright: © 2011 Elsevier B.V.
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.4 Crop Science; 3.4.96 QTL
Web Of Science research areas: Agronomy
ESI research areas: Agricultural Sciences