使用表达式数据精确地绘制与乳牛生育能力相关的QTL
Irene van den Berg1, Amanda J Chamberlain2,3, Iona M MacLeod2
1Agriculture Victoria, AgriBio, Centre of AgriBioscience, 5 Ring Road, Bundoora, VIC, 3082, Australia. irene.vandenberg@agriculture.vic.gov.au.
Genetics, selection, evolution : GSE
|June 6, 2024
概括
识别与乳牛生育相关的遗传变异是基因组预测的关键. 这项研究结合了表达数据和全基因组关联研究,以确定影响女性生育能力的基因,为育种计划提供了新的目标.
科学领域:
- 动物遗传学动物遗传学
- 生殖生物学 生殖生物学
- 基因组选择 基因组选择
背景情况:
- 雌性生育能力是乳牛养殖中的一个关键特征.
- 通过识别因果变异,可以提高对生育的基因组预测准确度.
- 表达量的特征位点 (eQTL) 和等位基因频率提供了对生育能力遗传调节的见解.
研究的目的:
- 精确地绘制与乳牛生育能力相关的定量特征位点 (QTL).
- 将多种类型的表达数据与生育特征和等位基因频率集成在一起.
- 为了确定高 (POS) 和低 (NEG) 生育率奶牛之间的基因组差异.
主要方法:
- 全基因组关联研究 (GWAS) 关于澳大利亚奶牛的分娩间隔 (CI).
- 对基因,外子,基因剪接和等位基因特异性表达 (eQTL) 的分析.
- 高和低生育率 (POS与NEG) 奶牛之间的等位基因频率和基因表达的比较.
主要成果:
- 与CI和eQTL相关的变体之间发现了显著的重叠.
- 671个基因在POS和NEG奶牛之间显示出显著的差异性表达,CCDC196显示出最大的折叠变化.
- 已发现的生育候选基因包括GYS2,TIGAR,SYT3和HSD17B14;几个QTL区域含有副本数变异 (CNV).
结论:
- 与分娩间隔相关的变体为eQTL.eQTL进行了丰富.
- 不同基因表达分析揭示了671个与生育相关的候选基因.
- 重叠的QTL和eQTL区域为改善乳牛生育能力提供了有价值的候选基因.
相关概念视频
Punnett Squares
Overview
Pedigree Analysis
Overview
X-linked Traits
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
Punnett Squares
Overview
X-linked Traits
In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
Heritability
Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic" a trait is,...


