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父亲份额预测了儿子的胎儿丸激素
Ruth Fishman1,2, Lee Koren3, Rachel Ben-Shlomo4
1Department of Brain Sciences, Weizmann Institute of Science, 76100, Rehovot, Israel. ruthevolu@gmail.com.
Scientific reports
|October 4, 2023
概括
努特里亚雌性可能保持多重父权,以增加 litter 遗传多样性,这是一个投注对冲策略. 这种生殖策略可以提高后代的生存率,特别是在面临遗传瓶的入侵种群中.
科学领域:
- 生殖生物学 生殖生物学
- 行为生态学 行为生态学
- 侵袭性物种管理 侵袭性物种管理
背景情况:
- 多个父亲,一个雌性后代有多个父亲,在许多物种中很常见.
- 虽然男性的好处是显而易见的,但女性的好处,如"好基因"或增加 litter 遗传多样性的理解较少.
- 努特里亚 (Myocastor coypus) 是入侵性动物,具有多妻性交配系统,有利于主导性雄性.
研究的目的:
- 为了调查多重父亲的发病率和维持在nutria.
- 探索可能的适应性解释为女性nutria多重父权.
- 检查胎儿丸激素水平与父权和男性主导关系.
主要方法:
- 从被除的营养体中对子宫内胎儿的遗传分析.
- 在整个妊娠期间量化多重父亲的发生率.
- 测量胎儿丸激素水平与 sire 和男性优势的关系.
主要成果:
- 在nutria中观察到多重父亲的高发病率,在整个妊娠期间保持.
- 由主导男性生育的男性胎儿表现出更高的丸激素水平.
- 由较少主导 ("罕见") 雄性生育的男性胎儿的丸激素水平较低,尽管保持了.
结论:
- 努特里亚雌性可能保持多重父权,作为增加 litter 遗传多样性的投注对冲策略.
- 这一策略可能有利于入侵物种通过遗传瓶来殖民新的环境.
- 观察到的模式表明,子遗传多样性和个体后代的繁殖成功之间存在潜在的权衡.
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