您好，欢迎访问黑龙江省农业科学院 机构知识库！
黑龙江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 variation patterns between landraces and cultivars uncover divergent selection during modern wheat breeding

文献类型： 外文期刊

作者： Liu, Jindong 1 ; Rasheed, Awais 1 ; He, Zhonghu 1 ; Imtiaz, Muhammad 5 ; Arif, Anjuman 6 ; Mahmood, Tariq 4 ; Ghafoor, 1 ;

作者机构： 1.CAAS, Natl Wheat Improvement Ctr, Inst Crop Sci, 12 Zhongguancun South St, Beijing 100081, Peoples R China

2.China Agr Univ, State Key Lab Agrobiotechnol, Dept Plant Genet & Breeding, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China

3.CAAS, Int Maize & Wheat Improvement Ctr, CIMMYT China Off, 12 Zhongguancun South St, Beijing 100081, Peoples R China

4.Quaid I Azam Univ, Islamabad, Pakistan

5.Natl Agr Res Ctr, Int Maize & Wheat Improvement Ctr, CIMMYT Pakistan Off, Islamabad, Pakistan

6.NIAB, Faisalabad, Pakistan

7.NARC, BCI, Islamabad, Pakistan

8.Heilongjiang Acad Agr Sci, Crop Res Inst, Harbin 150086, Heilongjiang, 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： 2019 年 132 卷 9 期

页码：

收录情况： SCI

摘要： Key message Genetic diversity, population structure, LD decay, and selective sweeps in 687 wheat accessions were analyzed, providing relevant guidelines to facilitate the use of the germplasm in wheat breeding. Common wheat (Triticum aestivum L.) is one of the most widely grown crops in the world. Landraces were subjected to strong human-mediated selection in developing high-yielding, good quality, and widely adapted cultivars. To investigate the genome-wide patterns of allelic variation, population structure and patterns of selective sweeps during modern wheat breeding, we tested 687 wheat accessions, including landraces (148) and cultivars (539) mainly from China and Pakistan in a wheat 90 K single nucleotide polymorphism array. Population structure analysis revealed that cultivars and landraces from China and Pakistan comprised three relatively independent genetic clusters. Cultivars displayed lower nucleotide diversity and a wider average LD decay across whole genome, indicating allelic erosion and a diversity bottleneck due to the modern breeding. Analysis of genetic differentiation between landraces and cultivars from China and Pakistan identified allelic variants subjected to selection during modern breeding. In total, 477 unique genome regions showed signatures of selection, where 109 were identified in both China and Pakistan germplasm. The majority of genomic regions were located in the B genome (225), followed by the A genome (175), and only 77 regions were located in the D genome. EigenGWAS was further used to identify key selection loci in modern wheat cultivars from China and Pakistan by comparing with global winter wheat and spring wheat diversity panels, respectively. A few known functional genes or loci found within these genome regions corresponded to known phenotypes for disease resistance, vernalization, quality, adaptability and yield-related traits. This study uncovered molecular footprints of modern wheat breeding and explained the genetic basis of polygenic adaptation in wheat. The results will be useful for understanding targets of modern wheat breeding, and in devising future breeding strategies to target beneficial alleles currently not pursued.

  • 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：黑龙江省农业科学院

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