Genome-wide association of yield traits in a nested association mapping population of barley reveals new gene diversity for future breeding

To explore wild barley as a source of useful alleles for yield improvement in breeding, we have carried out a genome-wide association scan using the nested association mapping population HEB-25, which contains 25 diverse exotic barley genomes superimposed on an ~70% genetic background of cultivated...

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Veröffentlicht in:Journal of experimental botany. - 1985. - 69(2018), 16 vom: 18. Juli, Seite 3811-3822
1. Verfasser: Sharma, Rajiv (VerfasserIn)
Weitere Verfasser: Draicchio, Fulvia, Bull, Hazel, Herzig, Paul, Maurer, Andreas, Pillen, Klaus, Thomas, William T B, Flavell, Andrew J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Fertilizers Nitrogen N762921K75
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520 |a To explore wild barley as a source of useful alleles for yield improvement in breeding, we have carried out a genome-wide association scan using the nested association mapping population HEB-25, which contains 25 diverse exotic barley genomes superimposed on an ~70% genetic background of cultivated barley. A total of 1420 HEB-25 lines were trialled for nine yield-related grain traits for 2 years in Germany and Scotland, with varying N fertilizer application. The phenotypic data were related to genotype scores for 5398 gene-based single nucleotide polymorphism (SNP) markers. A total of 96 quantitative trait locus (QTL) regions were identified across all measured traits, the majority of which co-localize with known major genes controlling flowering time (Ppd-H2, HvCEN, HvGI, VRN-H1, and VRN-H3) and spike morphology (VRS3, VRS1, VRS4, and INT-C) in barley. Fourteen QTL hotspots, with at least three traits coinciding, were also identified, several of which co-localize with barley orthologues of genes controlling grain dimensions in rice. Most of the allele effects are specific to geographical location and/or exotic parental genotype. This study shows the existence of beneficial alleles for yield-related traits in exotic barley germplasm and provides candidate alleles for future improvement of these traits by the breeder 
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650 4 |a Research Support, Non-U.S. Gov't 
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700 1 |a Draicchio, Fulvia  |e verfasserin  |4 aut 
700 1 |a Bull, Hazel  |e verfasserin  |4 aut 
700 1 |a Herzig, Paul  |e verfasserin  |4 aut 
700 1 |a Maurer, Andreas  |e verfasserin  |4 aut 
700 1 |a Pillen, Klaus  |e verfasserin  |4 aut 
700 1 |a Thomas, William T B  |e verfasserin  |4 aut 
700 1 |a Flavell, Andrew J  |e verfasserin  |4 aut 
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