尽管两只后院歌鸟之间罕见的当代杂交,但广泛的本地侵入
Kathryn C Grabenstein1,2, Angela N Theodosopoulos1,3, Georgy A Semenov1
1Department of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, United States.
Evolution; international journal of organic evolution
|October 1, 2025
概括
人类息地的破坏推动了歌鸟的杂交,但繁殖障碍限制了新的杂交. 然而,当代和历史上的杂交都会发生,城市森林可能会影响持续的基因流动.
科学领域:
- 进化生物学 进化生物学
- 鸟类学 鸟类学是一门学科.
- 保护遗传学 保护遗传学
背景情况:
- 全球杂交的速度正在增加,但进化历史和结果仍然不太清楚.
- 人类对杂交的影响很难评估,因为历史和生态数据有限.
- 了解杂交对于理解人类对进化的影响至关重要.
研究的目的:
- 研究黑顶 (Poecile atricapillus) 和山 (P. gambeli) 之间的生殖生态和杂交.
- 评估与人类息地扰乱有关的当代和历史杂交的程度.
- 探索影响已知的热点中正在进行的杂交的因素.
主要方法:
- 综合3年的人口监测与569个人的全基因组测序.
- 在一个同情的区域分析了生殖生态和遗传祖先.
- 研究的杂交模式与人类息地扰乱相关.
主要成果:
- 检测到的早期一代杂交物很少,这表明生殖障碍通常会阻止当代杂交.
- 所有被采样的同情的都显示出异种祖先的证据,表明了历史和当代的杂交.
- 杂交率与人类息地扰乱相关,特别是在北美.
结论:
- 生殖障碍在很大程度上有效地防止了这些种之间的当代杂交.
- 尽管存在障碍,但历史和持续的基因流动仍在发生,广泛的异种祖先证明了这一点.
- 城市森林在促进当代杂交中的作用需要进一步研究.
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