亚麻产量相关性状的全基因组关联分析

项目名称： 亚麻产量相关性状的全基因组关联分析

项目编号： No.31301402

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 农业科学

项目作者： 邓欣

作者单位： 中国农业科学院麻类研究所

项目金额： 22万元

中文摘要： 我国是亚麻纤维加工和产品出口大国。由于国内亚麻品种单产低，亚麻纤维原料短缺，导致我国的麻纺产业近十年来严重依赖进口，提高亚麻品种的纤维产量成为亚麻育种的当务之急。然而，亚麻的种质资源遗传基础狭窄，产量形成相关遗传基础研究匮乏，使得多年来亚麻的高产育种一直未能取得突破性进展。本研究拟利用前期开发的大量亚麻SSR分子标记，结合多年多点的性状调查数据，对来自世界38个国家和地区的182份亚麻资源材料进行遗传多样性及群体遗传结构分析。并在此基础上，首次采用全基因组关联分析方法研究标记位点间的连锁不平衡及亚麻基因组的LD衰减水平，进行分子标记与产量相关性状的关联分析，明确与产量相关性状显著关联的标记位点，并发掘含有相关位点优异等位变异的种质材料，从而为亚麻产量相关性状的基因定位、基因克隆和分子标记辅助育种等研究的开展奠定基础，并为高效发掘亚麻其他优异基因资源及种质创新提供科学依据。

中文关键词： 亚麻；SSR 分子标记；遗传多样性；关联分析；产量相关性状

英文摘要： China is a large linen processing and exporting country. However, due to the low yield of existing varieties and the shortage of raw flax, our linen industry was heavily dependent on imports over the past decade, increasing fiber yield therefore is an immediate imperative of flax breeding. However, linen high-yield breeding has not been able to make a breakthrough, owing to the limited genetic variation genealogy of flax germplasm, and the lack of research on the genetic basis of fiber yield. The aim of this study is to understand the genetic diversity and population genetic structure of flax germplasm, and identify the SSR markers closely associated with yield related traits, explore germplasm containing elite alleles. A genome-wide association study with SSR molecular marker was first used to analyze a flax core germplasm collection consisting of 182 varieties, originating from 38 countries and regions, and the Linkage disequilibrium (LD) level. The results of the research not only could lay the foundation for the launching of the flax yield related traits, gene cloning and molecular marker-assisted breeding, can also provide valuable scientific basis for the efficient excavation other excellent genetic resources and germplasm innovation of flax.

英文关键词： flax；SSR molecular marker；genetic diversity；association analysis；yield related traits