| GWAS analysis of 172 wheat grain traits in Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2026.03.01 |
| Key Words: wheat grain trait GWAS analysis candidate gene multiple effect loci genetic diversity |
| Author Name | Affiliation | | GAO Zhonghao | School of Ecological and Environmental Engineering, Qinghai University, Xining, Qinghai 810016, China | | WANG Xin | School of Ecological and Environmental Engineering, Qinghai University, Xining, Qinghai 810016, China | | ZHANG Zhaomin | School of Ecological and Environmental Engineering, Qinghai University, Xining, Qinghai 810016, China | | ZHANG Xiaojuan | School of Ecological and Environmental Engineering, Qinghai University, Xining, Qinghai 810016, China |
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| Abstract: |
| To dissect the genetic basis of grain traits in Qinghai wheat and explore the genes related to wheat grain traits, 172 Qinghai wheat varieties were used as materials. Based on the field phenotypic data from 6 environments over 3 years, genotyping was conducted using 120K SNP chip data, and a genome\|wide association study (GWAS) was carried out in combination with grain traits to screen significant associated loci and discover potential new superior loci so as to provide materials and a theoretical basis for the breeding of high\|yield wheat varieties in Qinghai Province. The results showed that 97 373 high\|quality SNP loci were evenly distributed on 21 chromosome groups after quality control, with a total density of B genome > A genome > D genome; the total polymorphism information content of the genome was 0.3067, the attenuation distance of linkage disequilibrium at the genome level was 3.38 Mb, and the 172 tested wheat samples were divided into 8 subgroups. The GWAS analysis found that a total of 183 significant loci were located in these 6 environments, including 21 stable loci that could be detected in at least two environments and 6 multi\|effect loci simultaneously regulating grain length\|to\|width ratio and grain roundness; among them, only one QTL was located near the previously reported position, and the rest were newly discovered loci. Further analysis predicted a total of 9 candidate genes related to wheat grain traits, which were involved in the growth and development of wheat, stress response, cell growth and cell wall synthesis, and the coordination of stress resisitance and stable yield. |
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