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Identification of Genetic Variations and Candidate Genes Responsible for Stalk Sugar Content and Agronomic Traits in Fresh Corn via GWAS across Multiple Environments

文献类型： 外文期刊

作者： Chen, Jianjian 1 ; Cao, Jinming 2 ; Bian, Yunlong 2 ; Zhang, Hui 3 ; Li, Xiangnan 1 ; Wu, Zhenxing 1 ; Guo, Guojin 1 ; Lv, Guihua 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Maize & Featured Upland Crops, Hangzhou 310004, Peoples R China

2.Yangzhou Univ, Coinnovat Ctr Modern Prod Technol Grain Crops, Jiangsu Key Lab Crop Genom & Mol Breeding, Key Lab Plant Funct Genom Minist Educ, Yangzhou 225009, Jiangsu, Peoples R China

3.Zhejiang Agr Technol Extens Ctr, Hangzhou 310004, Peoples R China

关键词： fresh corn; stalk sugar content; agronomic traits; genome-wide association analysis; selective sweep; single nucleotide polymorphisms

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 21 期

页码：

收录情况： SCI

摘要： The stem and leaves of fresh corn plants can be used as green silage or can be converted to biofuels, and the stalk sugar content and yield directly determine the application value of fresh corn. To identify the genetic variations and candidate genes responsible for the related traits in fresh corn, the genome-wide scan and genome-wide association analysis (GWAS) were performed. A total of 32 selective regions containing 172 genes were detected between sweet and waxy corns. Using the stalk sugar content and seven other agronomic traits measured in four seasons over two years, the GWAS identified ninety-two significant single nucleotide polymorphisms (SNPs). Most importantly, seven SNPs associated with the stalk sugar content were detected across multiple environments, which could explain 13.68-17.82% of the phenotypic variation. Accessions differing in genotype for certain significant SNPs showed significant variation in the stalk sugar content and other agronomic traits, and the expression levels of six important candidate genes were significantly different between two materials with different stalk sugar content. The genetic variations and candidate genes provide valuable resources for future studies of the molecular mechanism of the stalk sugar content and establish the foundation for molecular marker-assisted breeding of fresh corn.

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