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A Genome-Wide Association Study to Identify Novel Candidate Genes Related to Low-Nitrogen Tolerance in Cucumber (Cucumis sativus L.)

文献类型： 外文期刊

作者： Li, Bowen 1 ; Wei, Aimin 2 ; Tong, Xueqiang 1 ; Han, Yike 2 ; Liu, Nan 2 ; Chen, Zhengwu 2 ; Yang, Hongyu 1 ; Wu, Huaxiang 1 ; Lv, Mingjie 4 ; Wang, Ning Ning 1 ; Du, Shengli 1 ;

作者机构： 1.Nankai Univ, Coll Life Sci, Tianjin 300071, Peoples R China

2.Tianjin Acad Agr Sci, Cucumber Res Inst, Tianjin 300192, Peoples R China

3.State Key Lab Vegetable Biobreeding, Tianjin 300192, Peoples R China

4.Tianjin Acad Agr Sci, Inst Germplasm Resources & Biotechnol, Tianjin 300061, Peoples R China

5.Nankai Univ, Coll Agr Sci, Tianjin 300071, Peoples R China

关键词： cucumber; genome-wide association study (GWAS); nitrogen limitation

期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN：

年卷期： 2023 年 14 卷 3 期

页码：

收录情况： SCI

摘要： Cucumber is one of the most important vegetables, and nitrogen is essential for the growth and fruit production of cucumbers. It is crucial to develop cultivars with nitrogen limitation tolerance or high nitrogen efficiency for green and efficient development in cucumber industry. To reveal the genetic basis of cucumber response to nitrogen starvation, a genome-wide association study (GWAS) was conducted on a collection of a genetically diverse population of cucumber (Cucumis sativus L.) comprising 88 inbred and DH accessions including the North China type, the Eurasian type, the Japanese and South China type mixed subtype, and the South China type subtype. Phenotypic evaluation of six traits under control (14 mM) and treatment (3.5 mM) N conditions depicted the presence of broad natural variation in the studied population. The GWAS results showed that there were significant differences in the population for nitrogen limitation treatment. Nine significant loci were identified corresponding to six LD blocks, three of which overlapped. Sixteen genes were selected by GO annotation associated with nitrogen. Five low-nitrogen stress tolerance genes were finally identified by gene haplotype analysis: CsaV3_3G003630 (CsNRPD1), CsaV3_3G002970 (CsNRT1.1), CsaV3_4G030260 (CsSnRK2.5), CsaV3_4G026940, and CsaV3_3G011820 (CsNPF5.2). Taken together, the experimental data and identification of candidate genes presented in this study offer valuable insights and serve as a useful reference for the genetic enhancement of nitrogen limitation tolerance in cucumbers.

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