您好，欢迎访问山西省农业科学院 机构知识库！
山西省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Genome-wide association study identifies QTL for thousand grain weight in winter wheat under normal- and late-sown stressed environments

文献类型： 外文期刊

作者： Wang, Xiaobo 1 ; Guan, Panfeng 1 ; Xin, Mingming 1 ; Wang, Yongfa 1 ; Chen, Xiyong 2 ; Zhao, Aiju 2 ; Liu, Manshuang 3 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Key Lab Crop Genet Improvement, State Key Lab Agrobiotechnol,Key Lab Crop Heteros, Beijing 100193, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Hebei Crop Genet Breeding Lab, Shijiazhuang 050035, Hebei, Peoples R China

3.Northwest A&F Univ, Agron Coll, Yangling 712100, Shaanxi, Peoples R China

4.Shanxi Acad Agr Sci, Inst Wheat, Linfen 041000, Shanxi, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期：

页码：

收录情况： SCI

摘要： Key message GWAS identified stable loci for TGW and stress tolerance in winter wheat based on two sowing conditions, which will provide opportunities for developing new cultivars with high yield and yield stability. Wheat is an important food crop widely cultivated in the world. Breeding new varieties with high yields and superior adaptability is the main goal of modern wheat breeding program. In order to determine the marker-trait associations (MATs), a set of 688 diverse winter wheat accessions were subjected to genome-wide association study (GWAS) using the wheat 90K array. Field trials under normal-sown (NS) and late-sown (LS) conditions were conducted for thousand grain weight (TGW) and stress susceptibility index (SSI) at three different sites across two consecutive years. A total of 179 (NS) and 158 (LS) MATs corresponded with TGW; of these, 16 and 6 stable MATs for TGW(NS)and TGW(LS)were identified on chromosomes 1B, 2B, 3A, 3B, 5A, 5B, 5D, 6B, and 7D across at least three environments. Notably, a QTL hot spot controlling TGW under NS and LS conditions was found on chromosome 5A (140-142 cM). Moreover, 8 of 228 stable MATs on chromosomes 4B, 5A, and 5D for SSI were detected. A haplotype block associated with TGW and SSI was located on chromosome 5A at 91 cM, nearby the vernalization geneVRN-A1. Additionally, analysis of wheat varieties from the different eras revealed that the grain weight and stress tolerance are not improved concurrently. Overall, our results provide promising alleles controlling grain weight and stress tolerance (particularly for thermotolerance) for wheat breeders, which can be used in marker-assisted selection for improving grain yield and yield stability in wheat.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台