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大规模的物种间内入侵压倒了美洲虎,狮子和之间的基因组关系

Sarah H D Santos^1,2, Henrique V Figueiró^1,3, Tomas Flouri⁴

¹Laboratory of Genomics and Molecular Biology, School of Health and Life Sciences, PUCRS, Porto Alegre, RS, Brazil.

Systematic biology

|March 24, 2025

概括

遗传学分析显示,大猫中占主导地位的基因组树不是物种树. 相反,狮子和之间肆虐的杂交,而不是物种化,塑造了它们的进化历史.

科学领域:

进化生物学进化生物学
基因组学就是基因组学.
人类遗传学是一个学科.

背景情况:

种系重建受到物种间杂交的挑战,其中杂交可以掩盖真正的物种树.
潘得拉物种 (美洲虎,狮子,) 之间的进化关系复杂且难以解决.
以前的研究表明,杂交可能在Panthera进化中发挥了作用.

研究的目的:

使用全基因组数据调查美洲虎,狮子和之间的遗传关系.
为了确定杂交是否影响了这些物种中占主导地位的遗传学信号.
评估杂交对从基因组数据推断物种树的影响.

主要方法:

jaguar,狮子和的个人全基因组测序.
用最大概率树从不同大小的基因组片段进行的家族基因组学分析.
对重组率进行了校正的差异时间估计.
侵入性分析和多种类聚合与侵入性 (MSci) 建模.

主要成果:

最大的概率树始终支持单一的物种,但显示出联合狮子和的支配拓.
这种主导拓在高重组区中普遍存在,而替代拓在低重组区中更加丰富.
对分歧时间的分析表明,年轻的狮子和分裂,这表明分化后的混合物.
内进化分析和MSci模型证实了狮子和之间的普遍杂交,拒绝了没有内进化的模型.

结论:

在Panthera中占主导地位的全基因组树拓学并不反映物种树,而是广泛的物种化后混合的结果.
狮子和之间的杂交显著影响了家族遗传推断,使得它们的进化历史复杂化.
了解内入侵对于具有复杂进化动态的物种中精确的基因组重建至关重要.

关键词:

进化进化进化进化进化进化进化菲利达群 (Felidae) 是一个群体.潘得拉 (Panthera) 是一个类动物.混合化混合化混合化种类的变化种类的变化

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