Genome-wide association study of drought tolerance traits in sugar beet germplasms at the seedling stage

文献类型： 外文期刊

第一作者： Li, Wangsheng

作者： Li, Wangsheng;Li, Jiajia;Liu, Dali;Tan, Wenbo;Yin, Xilong;Zhai, Yan;Xing, Wang;Li, Wangsheng;Li, Jiajia;Liu, Dali;Tan, Wenbo;Yin, Xilong;Zhai, Yan;Xing, Wang;Lin, Ming;Zhou, Yuanhang

作者机构：

关键词： sugar beet germplasms; PEG-6000 drought stress; SNP; GWAS; linkage disequilibrium

期刊名称：FRONTIERS IN GENETICS （ 影响因子：3.7； 五年影响因子：4.3 ）

ISSN：

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Introduction: Sugar beets are an important crop for global sugar production. Intense drought and the increasing lack of water resources pose a great threat to sugar beet cultivation. It is a priority to investigate favourable germplasms and functional genes to improve the breeding of drought tolerant plants. Methods: Thus, in this study, 328 sugar beet germplasms were used in a genomewide association study (GWAS) to identify single nucleotide polymorphism (SNP) markers and candidate genes associated with drought tolerance. Results: The results showed that under drought stress (9% PEG-6000), there were 11 significantly associated loci on chromosomes 2, 3, 5, 7, and 9 from the 108946 SNPs filtered using a mixed linear model (MLM). Genome-wide association analysis combined with qRT-PCR identified 13 genes that were significantly differentially expressed in drought-tolerant extreme materials. Discussion: These candidate genes mainly exhibited functions such as regulating sugar metabolism, maintaining internal environmental stability and participating in photosystem repair. This study provides valuable information for exploring the molecular mechanisms of drought tolerance and improvement in sugar beet.

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