在小麦中进行Skim exome捕获基因定型
Hongliang Wang1, Amy Bernardo1, Paul St Amand1
1USDA-ARS, Hard Winter Wheat Genetics Research Unit, Center for Grain and Animal Health Research, Manhattan, Kansas, USA.
The plant genome
|August 21, 2023
概括
我们开发了Skim exome capture (SEC),这是一种成本效益高的基因组定型方法,用于小麦等复杂的基因组. 这种方法可以为育种和遗传学研究提供高质量的变异检测.
科学领域:
- 基因组学就是基因组学.
- 植物育种 植物育种
- 生物信息学是一种生物信息学.
背景情况:
- 下一代测序 (NGS) 的成本正在下降,使全基因组基因型化成为作物研究的可行性.
- 体测序和外基因组捕获是既定的方法,但面临的挑战是复杂的基因组,如全聚类小麦.
- 现有的方法可能是昂贵的,可能不适合在各种作物物种中进行大规模的基因型鉴定.
研究的目的:
- 为复杂的植物基因组开发一个具有成本效益的向基因型定型方法.
- 为了实现高分辨率的定量特征位点 (QTL) 地图和小麦的基因组选择.
- 为各种下游应用确定大量高质量的基因变异.
主要方法:
- 通过破碎DNA开发了脱脂外体捕获 (SEC),使用小麦外体诱丰富低复制基因区域,并多重化样本.
- 将SEC应用于48个,528个和1056个小麦样本的图书馆,实现不同的覆盖水平 (分别为∼7-8×,0.76×和0.32×).
- 集成的低覆盖率SEC数据与基因类型归算使用定制小麦实用单元型图表数据库.
主要成果:
- 在较小的样本集中实现了高质量的变体检测,覆盖率约为7-8×.
- 成功生成了较低覆盖率 (0.76×和0.32×) 的基因型数据,用于大型样本集 (528和1056个样本).
- 通过SEC和归算,在小麦基因组中确定了数十万种高质量的基因变异.
结论:
- 体外基因组捕获 (SEC) 是一种具有成本效益的方法,用于针对小麦等复杂的全聚类作物进行基因型定位.
- 结合基因型归算的SEC方法,可促进高分辨率的QTL映射,全基因组关联研究和基因组选择.
- 与传统的外体捕获相比,这种方法显著降低了每样本的成本,使大规模遗传研究更容易获得.
相关概念视频
Genome-wide Association Studies-GWAS
13.6K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.6K
Genomics
36.5K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
36.5K


