长期进化实验中的生殖隔离的进化与Drosophila melanogaster:30年不同的生命史选择的30年
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Updated: Jul 28, 2025

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Assessing Differences in Sperm Competitive Ability in Drosophila
Published on: August 22, 2013
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Chloe E Robinson1, Harshavardhan Thyagarajan1, Adam K Chippindale1
1Biology Department, Queen's University, Kingston, ON, Canada.
概括
果在生殖年龄上的差异性选择进化出了强烈的前期生殖隔离 (RI). 继产后的RI并没有进化,与预产障碍首先出现的理论保持一致.
科学领域:
- 进化生物学是进化的生物学.
- 遗传学 是一个遗传学.
- 动物行为 动物行为
背景情况:
- 生命史的特征,如生殖时的年龄,受到自然和性选择的影响.
- 生殖隔离 (RI) 对于物种化至关重要,不同的形式 (交配前,交配后 - 孕产卵前,孕产卵后) 可能以不同的速度进化.
研究的目的:
- 调查Drosophila melanogaster在生殖时的年龄上发生了三十年的分歧选择是否导致了生殖隔离的进化.
- 为了确定哪些形式的生殖隔离 (交配前,交配后-prezygotic,后zygotic) 在选定的群体之间已经演变.
主要方法:
- 使用Drosophila melanogaster的三个复制种群对在分娩时因年龄而异的选择下进行实验进化.
- 通过个人伴侣选择试验评估预孕RI.
- 通过分析后代的杂交成功和杂交适应性来评估交配后的先发性和后发性RI.
主要成果:
- 种群在体型上产生了显著的差异.
- 伴侣选择试验揭示了强烈的同型伴侣偏好,表明由性选择或冲突驱动的进化前产生生殖隔离.
- 杂交后代具有中介性质的可生存性和肥沃性;没有检测到有意义的后交配前zygotic或后zygotic RI.
结论:
- 在繁殖时因年龄而异的选择可以快速演变为Drosophila.在生殖隔离之前的生殖隔离.
- 结果支持这样一个假设:生殖前的分娩形式在生殖后的形式之前演变为生殖隔离.
- 性选择或性冲突可能在该系统中预先确定RI的演变中起着关键作用.
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