在小鼠家庭冲突解决的遗传基础
Reinmar Hager1, Rufus A Johnstone
1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. rh244@cam.ac.uk
Nature
|January 31, 2003
概括
父母的投资策略在母亲和父亲之间有所不同,影响后代的发展. 这项研究揭示了对小鼠子大小和资源供应的独特遗传控制,挑战了一些进化理论.
科学领域:
- 进化生物学是进化的生物学.
- 行为遗传学行为遗传学
- 生殖策略 生殖策略
背景情况:
- 父母的投资涉及不对称的成本和收益,导致家庭对子女的冲突.
- 父母和后代的基因表达影响了冲突解决,特别是在具有高母性投资的物种中.
研究的目的:
- 解开母亲,父亲和后代对父母投资和冲突解决的遗传影响.
- 研究母亲和父亲基因在塑造小鼠生命史特征中的相互作用.
主要方法:
- 在两个不同的小鼠菌株之间进行了相互交配和交叉养育实验.
- 分析了母亲和父亲对子大小和供应的遗传影响.
主要成果:
- 父亲基因型决定了幼大小,而母亲基因型控制了资源供应.
- 孕产妇的供给受到寄养后代的遗传背景的影响,这表明了菌株特定的相互作用.
- 与预测相反,在菌株内观察到母体供应和后代"需求"之间存在正相关性.
结论:
- 敌对的共同适应形成了母亲和父亲对生命历史特征的独特影响.
- 后代受益于从同一个菌株的母亲那里获得资源,这表明亲属识别或共同适应的遗传系统.
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