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选择特征分析显示,RDH5在绵羊养过程中在视力方面发挥了关键作用

Ruixue Hu^1,2, Xunping Jiang^1,2, Huiguo Yang³

¹Laboratory of Small Ruminant Genetics, Breeding and Reproduction, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.

Archives animal breeding

|June 29, 2023

概括

羊的化涉及到感官感知中的遗传变化. RDH5基因的特定突变影响了视力,并在化过程中被选择,可能会影响绵羊的视网膜健康.

科学领域:

基因组学就是基因组学.
动物遗传学动物遗传学
进化生物学进化生物学

背景情况:

羊 (Ovis aries) 是一种成功化的物种,自新石器时代以来出现了显著的表型变化.
在化过程中这些变异的遗传基础在很大程度上是未知的.
了解这些遗传变化可以揭示动物的进化和适应.

研究的目的:

研究亚洲羊 (Ovis orientalis) 和养的胡羊 (Ovis aries) 之间的遗传差异.
在绵羊养过程中识别积极选择下的基因.
探索特定基因 (如RDH5) 在表型变异和化中的作用.

主要方法:

整个基因组重新排序被用来比较野生和养绵羊的基因组.
生物信息分析用于识别积极选择的基因和检测遗传突变.
进行了功能分析,以评估鉴定出的突变对基因活性的影响.

主要成果:

鉴定出755个基因在化过程中受到积极选择.
与感官感知相关的基因,包括OPRL1,LEF1,TAS1R3,ATF6,VSX2,MYO1A和RDH5,显示出方向演变.
在RDH5基因中发现了一个特定的误解突变 (c.T722C/p.M241T),T等位基因固定在Hu羊中,降低了视网醇脱酶活性,并可能影响视力.

结论:

羊的化涉及与感官感知发展相关的基因的显著积极选择.
RDH5基因及其变体与绵羊视网膜退化有关.
在RDH5中发现的突变可能是有选择性的优势,由化期间的自然和人工选择压力所驱动.

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