中部老本土山羊的遗传多样性,种群结构和起源
Sang V Le1, Sara de Las Heras-Saldana2, Panoraia Alexandri2
1School of Rural & Environmental Science, University of New England, Armidale, New South Wales, Australia.
概括
老本土山羊表现出适度的遗传多样性和低的近亲繁殖,与中国和巴基斯坦品种有密切联系. 这项研究为保护这些宝贵的牲畜资源提供了关键的见解.
科学领域:
- 动物遗传学动物遗传学
- 畜牧科学 畜牧科学 畜牧科学
- 保护遗传学 保护遗传学
背景情况:
- 保持遗传多样性对于畜牧业的改善和防止近亲繁殖至关重要.
- 人们对老本土山羊在小农系统中的遗传多样性下降和近亲繁殖增加存在担忧.
研究的目的:
- 为了首次调查老本土山羊的遗传多样性.
- 探索老山羊和全球山羊种群之间的遗传关系.
- 评估老山羊的近亲繁殖水平和种群结构.
主要方法:
- 使用Illumina的山羊SNP50珠芯片进行基因分析.
- 将老山羊遗传与来自36个国家的163个全球山羊种群进行了比较.
- 分析了遗传多样性,异构性,遗传差异化 (FST),近亲繁殖系数 (FIS) 和同构性 (ROH) 的运行.
主要成果:
- 老本土山羊与中国,蒙古和巴基斯坦山羊有着密切的遗传关系.
- 观察到的异构性 (Ho) 从0.288到0.299不等,预期的异构性 (He) 从0.288到0.308.
- 发现了低到中度的遗传差异化 (FST:0.011-0.043) 和可以忽略不计的近亲繁殖系数 (FIS: -0.001到0.052).
- 短暂的同胞性 (ROH) 普遍存在,这表明最近的近亲繁殖是最小的.
结论:
- 老山羊具有适度的遗传多样性和低水平的近亲繁殖.
- 实际种群数量为保护目的而足够.
- 地理和文化因素可能导致老山羊种群中观察到的遗传差异.
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