父亲数据显示,在一个多妻性,平等的灵长类灵长类灵长类的父子中,MHC多样性很高
Paulo B Chaves1,2, Karen B Strier3, Anthony Di Fiore4,3
1Department of Anthropology, New York University, New York, USA.
Proceedings. Biological sciences
|August 2, 2023
概括
雌性灵长类动物避免近亲繁殖,并且可能选择具有多种免疫基因 (MHC) 的伴侣. 北方muriquis雌性显示MHC多样性在sires,但不是MHC不相似,表明伴侣选择受到限制.
科学领域:
- 灵长类的繁殖策略
- 行为生态学 行为生态学
- 免疫遗传学 免疫遗传学
背景情况:
- 雌性伴侣的选择对后代的生存至关重要,并且可以受到主要基因相容性复合体 (MHC) 多样性的影响.
- 社会结构 (专制与平等) 可以影响女性选择伴侣的程度,平等社会可能为女性提供更多自由.
- 北方muriquis,一个平等的灵长类动物物种,提供了一个独特的模型来研究女性伴侣选择在减少男性主导下.
研究的目的:
- 调查北方muriquis的雌性伴侣选择机制,重点是避免近亲繁殖和主要组织相容性复合体 (MHC) 的多样性.
- 为了确定雌性是否优先与不太相关的雄性交配和/或拥有更大的MHC多样性.
- 探索平等社会结构对女性生殖决策的影响.
主要方法:
- 使用遗传标记 (微卫星和MHC位点) 的父权分析.
- 在男性和女性的微卫星和MHC位点评估遗传变异.
- 将行为和生命史数据与遗传分析相结合.
主要成果:
- 后代的姐妹表现出比偶然预期的更高的MHC多样性,并且从来没有与母体有密切的关系.
- 雌性没有表现出偏好与与MHC相距较远的雄性交配,或与MHC不同于预期的雄性交配.
- 没有证据表明在MHC或中性位置发生分类交配,这表明雌性选择的潜在限制.
结论:
- 北方muriquis雌性避免与近亲交配,并表现出对MHC多样性的偏好.
- 平等的社会制度可能会促进女性选择配偶,允许她们选择具有多样化的MHC的非亲属男性.
- 尽管有偏好,但伴侣选择似乎受到影响男性受精成功的因素的限制,而不是仅仅由MHC不相似或相关性.
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