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Genetic architecture of maize yield traits dissected by QTL mapping and GWAS in maize

文献类型： 外文期刊

作者： Zhang, Xiao 1 ; Ren, Zhiyong 1 ; Luo, Bowen 1 ; Zhong, Haixu 1 ; Ma, Peng 1 ; Zhang, Hongkai 1 ; Hu, Hongmei 1 ; Wang, Yikai 1 ; Zhang, Haiying 1 ; Liu, Dan 1 ; Wu, Ling 1 ; Nie, Zhi 4 ; Zhu, Yonghui 5 ; He, Wenzhu 5 ; Zhang, Suzhi 1 ; Su, Shunzong 7 ; Shen, Yaou 1 ; Gao, Shibin 1 ;

作者机构： 1.Sichuan Agr Univ, Maize Res Inst, Chengdu 611130, Sichuan, Peoples R China

2.Minist Agr, Key Lab Biol & Genet Improvement Maize Southwest, Chengdu 611130, Sichuan, Peoples R China

3.Guangxi QingQing Agr Technol CO LTD, Nanning 530000, Guangxi, Peoples R China

4.Sichuan Acad Agr Sci, Biotechnol & Nucl Technol Res Inst, Chengdu 610066, Sichuan, Peoples R China

5.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Sichuan, Peoples R China

6.State Key Lab Crop Gene Explorat & Utilizat South, Chengdu 611130, Sichuan, Peoples R China

7.Sichuan Agr Univ, Coll Agron, Chengdu 611130, Sichuan, Peoples R China

关键词： Maize; Yield traits; Genome-wide association study (GWAS); Quantitative trait locus (QTL); Coexpression networks

期刊名称：CROP JOURNAL （ 影响因子：4.647； 五年影响因子：5.781 ）

ISSN： 2095-5421

年卷期： 2022 年 10 卷 2 期

页码：

收录情况： SCI

摘要： The study of yield traits can reveal the genetic architecture of grain yield for improving maize production. In this study, an association panel comprising 362 inbred lines and a recombinant inbred line population derived from X178 x 9782 were used to identify candidate genes for nine yield traits. High-priority overlap (HPO) genes, which are genes prioritized in a genome-wide association study (GWAS), were investigated using coexpression networks. The GWAS identified 51 environmentally stable SNPs in two environments and 36 pleiotropic SNPs, including three SNPs with both attributes. Seven hotspots containing 41 trait-associated SNPs were identified on six chromosomes by permutation. Pyramiding of superior alleles showed a highly positive effect on all traits, and the phenotypic values of ear diameter and ear weight consistently corresponded with the number of superior alleles in tropical and temperate germplasm. A total of 61 HPO genes were detected after trait-associated SNPs were combined with the coexpression networks. Linkage mapping identified 16 environmentally stable and 16 pleiotropic QTL. Seven SNPs that were located in QTL intervals were assigned as consensus SNPs for the yield traits. Among the candidate genes predicted by our study, some genes were confirmed to function in seed development. The gene Zm00001d016656 encoding a serine/threonine protein kinase was associated with five different traits across multiple environments. Some genes were uniquely expressed in specific tissues and at certain stages of seed development. These findings will provide genetic information and resources for molecular breeding of maize grain yield. (C) 2021 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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