Genome-wide association study and candidate gene prediction of salt tolerance related traits in maize
Received date: 2021-08-13
Revised date: 2021-10-02
Online published: 2021-12-07
Supported by
Supported by the Science and Technology Project of Nantong City, China(MS22020033);Talent Introduction Project of Nantong University No(135420609055)
Salt stress is an important factor that affects maize yield. In order to explore the genetic basis of salt tolerance in maize, a genome-wide association study (GWAS) using the mixed liner model was conducted on 150 maize inbred lines with rich genetic background and 34,342 polymorphism SNP markers. A total of 8 independent loci were identified that significantly associated with salt-tolerance traits, among which 3 loci were significantly associated with withering degree on chromosomes 4 and 9; and the remaining 5 loci were significantly associated with plant height change rate on chromosomes 1, 2, 3 and 6. Eleven candidate genes were identified according to the gene expression data under salt stress; and functional annotations verified 7 of them to be significantly up-regulated under salt stress by qRT-PCR. These findings lay a foundation for understanding the mechanism(s) of maize salt tolerance and provide new target genes for the breeding of maize salt tolerance germplasm.
Key words： maize; salt tolerance; mixed liner model; genome-wide association study
Tingyu Shan, Wen Shi, Yiting Wang, Ziyi Cao, Baohua Wang, Hui Fang . Genome-wide association study and candidate gene prediction of salt tolerance related traits in maize[J]. Hereditas(Beijing), 2021 , 43(12) : 1159 -1169 . DOI: 10.16288/j.yczz.21-298
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