当地的气候适应促进了全球入侵
Diana Gamba1, Megan L Vahsen2, Toby M Maxwell3
1Department of Biology, Pennsylvania State University; University Park, PA, USA.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
不同的草血统入侵北美,预先适应的基因型殖民于不同地区. 当地适应驱动侵入性主导地位,突出需要防止新的引入.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
背景情况:
- 当地适应可以推动入侵物种的范围扩大.
- 促进破坏性入侵的机制,如草 (Bromus tectorum),尚未完全理解.
- 草造成严重的生态和经济影响,特别是在北美西部.
研究的目的:
- 调查本地适应在北美草破坏性入侵中的作用.
- 确定草适应新环境的遗传和表型基础.
- 了解预先适应的基因型是如何促进入侵成功和统治的.
主要方法:
- 测序了307种草基因型的序列.
- 控制的共同花园实验来评估表型选择.
- 在本地和入侵范围中对基因组祖先和表型基因的分析.
主要成果:
- 具有预先适应的基因型的多种草血统殖民北美.
- 长途基因流动在被入侵的北美范围中很常见.
- 观察到花期的方向选择,在温暖和寒冷的地点之间逆转,保持适应性.
- 基因组预测确定了大盆地的高度适应的cheatgrass种群,与主导相关.
结论:
- 预先适应的基因型和局部适应,由诸如开花时间等特征的选择驱动,促进了草的入侵和主导地位.
- 了解这些机制对于预测和管理入侵物种至关重要.
- 防止新的引入对于制侵入性草的进一步适应和传播至关重要.
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