全基因组测序揭示了与天福山羊颜色斑点大小相关的主要位置的复杂结构变异
Jiazhong Guo1, Qingsi Huang1, Qiunan Xiang1
1Farm Animal Genetic Resources Exploration Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
BMC genomics
|September 30, 2025
概括
天福山羊的遗传分析显示,EDNRA基因附近的复杂结构变异是色素斑点大小的关键. 这些发现有助于我们更好地了解山羊外套颜色遗传学,并有助于选择性繁殖.
科学领域:
- 动物遗传学动物遗传学
- 基因组学就是基因组学.
- 畜牧科学 畜牧科学 畜牧科学
背景情况:
- 毛皮颜色是家畜品种识别的关键特征.
- 颜色斑点是天福 (TF) 山羊的一个显着的外观特征.
- 了解外套颜色变化的遗传基础对于畜牧管理至关重要.
研究的目的:
- 为了确定影响TF山羊颜色斑点大小的遗传基因和候选基因.
- 为了研究背后的基因组架构的外套颜色变化.
- 为山羊的选择性育种计划提供见解.
主要方法:
- 96只TF山羊的全基因组测序.
- 线性混合模型分析以确定相关的遗传位置.
- 用于结构变异 (SV) 验证的PacBio HiFi测序.
- 在特定的VS中对监管要素的形分析.
主要成果:
- 在染色体17上的EDNRA基因附近,发现了与色素斑点相关的主要位点.
- 发现了一个复杂的基因组重组,包括一个83,630-bp的反向重复,大约在EDNRA的上游80 kb.
- 这种反向重复解释了斑点大小的表型变异的30.99%.
- 在染色体4上检测到一个二次关联信号,结合的位置解释了55.79%的变化.
结论:
- 复杂的结构变异,特别是EDNRA附近的反向重复,是TF山羊颜色斑点大小的主要驱动因素.
- 鉴定到的基因变异提供了更深入地了解山羊的色素遗传学.
- 这些发现支持针对外套颜色特征和保护工作的有针对性的育种策略.
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