深度杂交在物种化中的作用:来自Thelypteridaceae的例子
Yu-Hsin Tseng1, Li-Yaung Kuo2, Israel Borokini3,4
1Department of Life Sciences, National Chung Hsing University, no. 145 Xingda Rd., South District, 40227, Taichung, Taiwan.
American journal of botany
|August 13, 2024
概括
系之间的深度杂交导致了新物种的出现,证明了全聚多性.
科学领域:
- 植物学 植物学
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
背景情况:
- 杂交是子物种化的一个关键驱动因素,经常观察到全聚类.
- 已经记录了深层的跨基因杂交事件,尽管它们通常会产生不育的后代.
研究的目的:
- 调查Thelypteridaceae的克里斯托洛伊德系内深度分离的血统之间的近期杂交物种化.
- 了解跨景观的杂交血统的生态和进化后果.
主要方法:
- 按阶段捕获的读取来自基因组数据集 (408个核位置) 使用HybPhaser识别杂交亲系.
- 估计的分歧年龄使用日期的基因组与化石校准 (treePL).
- 通过使用COUE框架对一个allotetraploid及其双胞胎祖先进行了评估生态利基保护主义.
主要成果:
- 在克里斯托罗伊德分类中确定了至少六个跨基因杂交物种的实例.
- 预计祖先分离时间高达4500万年.
- 利基分析显示了全聚类和祖先之间的适度重叠,其中一个与另一个的利基分歧和保守主义.
结论:
- 全聚多化 (Allopolyploidization) 跨基因杂交后的杂交在的多样化,范围和利基扩张中发挥着重要作用.
- 这种深度杂交的模式可能会导致其他类别中非常成功的新型血统.
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