伴侣的遗传相似性会影响交配行为,但不会影响母亲对小鼠的投资
Kerstin E Auer1, Jasmin Primus2, Sonja Istel3
1Institute of in vivo and in vitro Models, University of Veterinary Medicine Vienna, Vienna, Austria. kerstin.auer@vetmeduni.ac.at.
Scientific reports
|June 29, 2023
概括
雌性小鼠在母性投资中没有差异,包括幼的生存和发育,无论它们与交配伙伴的遗传相似性如何. 这表明,在受控的实验室条件下,遗传关系不会影响母亲的护理.
科学领域:
- 生殖生物学 生殖生物学
- 免疫遗传学 免疫遗传学
- 行为生态学 行为生态学
背景情况:
- 母亲的投资对于后代的生存和发育至关重要.
- 父母之间的遗传相似性可以影响生殖策略和后代的结果.
- 主性基因相容性复合体 (MHC) 在免疫识别和伴侣选择中发挥作用.
研究的目的:
- 为了调查雌性小鼠是否会根据与它们的交配伴侣的遗传相似性改变植入率和幼存活率.
- 为了确定雌性是否表现出不同的母体投资,这取决于男性伴侣的主要基因相容性复合体 (MHC) 基因型.
- 探索遗传亲属关系对受控实验环境中的生殖成功的影响.
主要方法:
- 在小鼠 (Mus musculus) 中进行实验性胚胎移植.
- 根据MHC单双型和遗传背景,配对不同遗传关系 (同位素,半同位素,等位素) 的雌雄.
- 评估交配成功 (插头率),植入率,幼存活率,子重量和性别比.
主要成果:
- 与异原体组相比,半异原体组的交配插头率明显高于异原体组.
- 在不同基因组的植入部位,出生或存活的幼犬数量, litter 体重或性别比率上没有发现显著差异.
- 尽管伴侣偏好偏好半同源性伴侣,但母亲的投资在各组之间没有差异.
结论:
- 在实验室条件和无病原体的环境下,雌性小鼠没有基于与交配伴侣的遗传相似性而表现出不同的母性投资.
- 该研究没有发现任何证据表明,雌性在与遗传上不相似的伴侣交配时调整投资以增加后代的遗传多样性或异构性.
- 交配偏好可能存在,但它们不会转化为改变母亲的投资策略,影响后代的生存或发展.
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