Genome-wide association study reveals loci associated with seed longevity in common wheat (Triticum aestivum L.)
文献类型： 外文期刊
作者： Zuo, Jing Hong 1 ; Chen, Feng Ying 1 ; Li, Xiao Ying 1 ; Xia, Xian Chun 3 ; Cao, Hong 1 ; Liu, Jin Dong 4 ; Liu, Yong 1 ;
作者机构： 1.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Beijing Engn Res Ctr Hybrid Wheat, Beijing, Peoples R China
3.Chinese Acad Agr Sci, Inst Crop Sci, Natl Wheat Improvement Ctr, Beijing, Peoples R China
4.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen, Guangdong, Peoples R China
关键词： ageing; genome-wide association study; germination ratio; seed longevity; Triticum aestivum
期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）
ISSN： 0179-9541
年卷期：
页码：
收录情况： SCI
摘要： Seed longevity could significantly determine seed regeneration cycle and greatly affect wheat production. With the 90 K chip assays, a genome-wide association study was performed to identify seed longevity-related markers and loci in common wheat. Seed germination ratios (GR) under artificially ageing of 166 wheat accessions across three environments were evaluated to assess seed longevity. Totally, 23 longevity-related loci were identified in the study, explaining 6.7%-11.4% of the phenotypic variations. Of these, QlgGR.cas-1A and QlgGR.cas-2B.2 were deemed as stable loci associated with wheat seed longevity. Fifteen loci were found overlapped with known quantitative trait loci or genes. Besides, QlgGR.cas-1A, QlgGR.cas-2B.2, QlgGR.cas-3D.1, QlgGR.cas-3D.2, QlgGR.cas-4A.2, QlgGR.cas-5A.1, QlgGR.cas-5A.2 and QlgGR.cas-6A.1 were colocated with seed dormancy-related loci. Significant additive effects were obtained for seed longevity by pyramiding favourable alleles. Several candidate genes were found involved in signal transduction and stress resistance pathways by sequencing analysis of significantly longevity-related molecular markers. These results might provide new sights into the genetic architecture of seed longevity.
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