Genome-wide association mapping in elite winter wheat breeding for yield improvement
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Published:2023-04-29
Issue:3
Volume:64
Page:377-391
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ISSN:1234-1983
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Container-title:Journal of Applied Genetics
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language:en
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Short-container-title:J Appl Genetics
Author:
Tyrka Mirosław,Krajewski Paweł,Bednarek Piotr Tomasz,Rączka Kinga,Drzazga Tadeusz,Matysik Przemysław,Martofel Róża,Woźna-Pawlak Urszula,Jasińska Dorota,Niewińska Małgorzata,Ługowska Bogusława,Ratajczak Dominika,Sikora Teresa,Witkowski Edward,Dorczyk Ada,Tyrka Dorota
Abstract
AbstractIncreased grain yield (GY) is the primary breeding target of wheat breeders. We performed the genome-wide association study (GWAS) on 168 elite winter wheat lines from an ongoing breeding program to identify the main determinants of grain yield. Sequencing of Diversity Array Technology fragments (DArTseq) resulted in 19,350 single-nucleotide polymorphism (SNP) and presence-absence variation (PAV) markers. We identified 15 main genomic regions located in ten wheat chromosomes (1B, 2B, 2D, 3A, 3D, 5A, 5B, 6A, 6B, and 7B) that explained from 7.9 to 20.3% of the variation in grain yield and 13.3% of the yield stability. Loci identified in the reduced genepool are important for wheat improvement using marker-assisted selection. We found marker-trait associations between three genes involved in starch biosynthesis and grain yield. Two starch synthase genes (TraesCS2B03G1238800 and TraesCS2D03G1048800) and a sucrose synthase gene (TraesCS3D03G0024300) were found in regions of QGy.rut-2B.2, QGy.rut-2D.1, and QGy.rut-3D, respectively. These loci and other significantly associated SNP markers found in this study can be used for pyramiding favorable alleles in high-yielding varieties or to improve the accuracy of prediction in genomic selection.
Funder
Ministry of Agriculture and Rural Development
Publisher
Springer Science and Business Media LLC
Subject
Genetics,General Medicine
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