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Identification of Multiple Genetic Loci Related to Low-Temperature Tolerance during Germination in Maize (Zea maize L.) through a Genome-Wide Association Study

文献类型： 外文期刊

作者： Yu, Tao 1 ; Zhang, Jianguo 1 ; Cao, Jingsheng 1 ; Li, Shujun 1 ; Cai, Quan 1 ; Li, Xin 1 ; Li, Sinan 1 ; Li, Yunlong 1 ; He, Changan 2 ; Ma, Xuena 1 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Maize Res Inst, Harbin 150086, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Biol & Genet Improvement Maize Northern No, Harbin 150086, Peoples R China

3.Key Lab Germplasm Resources Creat & Utilizat Maize, Harbin 150086, Peoples R China

4.Heilongjiang Acad Agr Sci, Keshan Branch, Qiqihar 161000, Peoples R China

关键词： abiotic stress; QTLs; low-temperature tolerance; genome-wide association study (GWAS)

期刊名称：CURRENT ISSUES IN MOLECULAR BIOLOGY （ 影响因子：3.1； 五年影响因子：3.3 ）

ISSN： 1467-3037

年卷期： 2023 年 45 卷 12 期

页码：

收录情况： SCI

摘要： Low-temperature stress during the germination stage is an important abiotic stress that affects the growth and development of northern spring maize and seriously restricts maize yield and quality. Although some quantitative trait locis (QTLs) related to low-temperature tolerance in maize have been detected, only a few can be commonly detected, and the QTL intervals are large, indicating that low-temperature tolerance is a complex trait that requires more in-depth research. In this study, 296 excellent inbred lines from domestic and foreign origins (America and Europe) were used as the study materials, and a low-coverage resequencing method was employed for genome sequencing. Five phenotypic traits related to low-temperature tolerance were used to assess the genetic diversity of maize through a genome-wide association study (GWAS). A total of 14 SNPs significantly associated with low-temperature tolerance were detected (-log10(P) > 4), and an SNP consistently linked to low-temperature tolerance in the field and indoors during germination was utilized as a marker. This SNP, 14,070, was located on chromosome 5 at position 2,205,723, which explained 4.84-9.68% of the phenotypic variation. The aim of this study was to enrich the genetic theory of low-temperature tolerance in maize and provide support for the innovation of low-temperature tolerance resources and the breeding of new varieties.

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