刚开始的Clarkia物种之间的内进程度是由时间环境变化和交配系统决定的
Shelley A Sianta1, David A Moeller1, Yaniv Brandvain1
1Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108.
概括
植物物种之间的杂交是常见的,但降雨等环境因素可能会影响其范围. 这项研究揭示,春季降水波动驱动了自生植物向外生植物的基因流量增加,影响了物种界限.
科学领域:
- 进化生物学 进化生物学
- 植物遗传学 植物遗传学
- 生态生态学 生态生态学
背景情况:
- 侵入性,即从一种物种转移到另一种物种的遗传物质,已经广泛存在,但其驱动因素仍然不清楚.
- 了解影响内入侵的因素至关重要,尤其是在全球环境变化的背景下.
- 植物交配系统 (自我与外交) 和环境变异被假设为调节内侵动力学.
研究的目的:
- 为了研究环境变化和交配系统分歧如何影响内进大小.
- 为了检查Clarkia*属中最近分离的外交-自生植物对之间的内向模式.
- 评估气候变化对杂交动态和物种界限的影响.
主要方法:
- 对来自 *Clarkia* 姐妹种群的 200 个基因组进行基因组分析.
- 利用了15年特定地点的环境数据集,重点关注降水.
- 在复制的二次接触区域中研究了内进模式.
主要成果:
- 内向是不对称的,由自我向外交的基因流量较大,由F1杂交形成和反向交叉驱动.
- 在接触区之间观察到外交混合物比例的显著变化.
- 春季降水的年间变化强烈预测了添加剂水平,较高的波动导致内进度增加.
结论:
- 环境因素,特别是降水变化,在塑造植物杂交动态方面发挥着关键作用.
- 气候变化可能会加剧气候驱动的杂交,可能会改变物种界限和适应.
- 该研究强调了在进化研究中考虑交配系统和环境波动的重要性.
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