分子标志物类型对估计有效种群大小和其他遗传参数在极度危的类型的影响
George Olah1,2, Robin S Waples3, Dejan Stojanovic1
1Fenner School of Environment and Society Australian National University Canberra Australian Capital Territory Australia.
Ecology and evolution
|March 25, 2024
概括
单核酸多态 (SNP) 标记器为保护提供比微卫星更精确的遗传估计,确保对危物种进行可靠的种群评估.
科学领域:
- 保护遗传学 保护遗传学
- 人口基因组学是人口的基因组学.
- 分子生态学分子生态学
背景情况:
- 在遗传学研究中,从微卫星转向单核酸多态性 (SNP) 标记物,这给保护学从业者带来了挑战.
- 准确的种群遗传参数估计对于有效的保护策略和物种保护至关重要.
研究的目的:
- 为了比较从微卫星和SNP标记器获得的种群遗传参数估计,在快 (Lathamus变色).
- 评估标记物类型和样本大小对遗传结构和有效种群大小 (Ne) 估计的影响.
- 为保护遗传学应用提供关于标记物选择的指导.
主要方法:
- 在7个微卫星,3761个SNP和100个SNP子集之间对基因参数估计 (异构性,基因结构,Ne) 的比较,使用324个单独的快.
- 分析后续年份的SNP数据 (457个样本) 以验证发现.
- 主要成分的区分分析 (DAPC) 推断遗传结构.
主要成果:
- 两种标记类型均为观察到的异构性 (HO) 与预期的异构性 (HE) 产生了相似的估计值,并表明了有限的空间遗传结构.
- 一个100个SNP的子集提供了与完整的SNP数据集可比的结果.
- 实际人口大小 (Ne) 的估计在标记类型之间是相似的,但SNP提供了更窄的置信区间.
- 当仅分析成年人样本时,估计结果有所不同,这凸显了包括所有年龄组的重要性.
- 使用较大的SNP数据集 (2010-2019) 与较小的数据集 (2010-2015) 相比,使用更高的Ne的估计.
结论:
- 与微卫星相比,SNP提供了对人口遗传参数,特别是有效人口大小的更精确估计,信心区间较窄.
- 使用微卫星进行的保护评估不太可能因转向SNP而无效,但SNP提高了对估计的信心.
- 建议将所有年龄组纳入遗传采样,以进行可靠的参数估计.
- 选择标记物和数据集大小可以影响估计,强调需要在保护规划中仔细考虑.
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