古代杂交促进了阿克罗波拉珊瑚的多样化
Tianzhen Wu1,2, Alan Ningyuan Xu3, Yanli Lei1,2,4
1Laboratory of Marine Organism Taxonomy and Phylogeny, Qingdao Key Laboratory of Marine Biodiversity and Conservation, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
Molecular ecology
|December 13, 2024
概括
古代的基因流,称为内进,在多样化之前显著塑造了Acropora珊瑚的进化. 这种古老的杂交可能推动了它们的快速辐射,影响了遗传学研究.
科学领域:
- 海洋生物学 海洋生物学
- 进化遗传学 进化遗传学
- 基因组学就是基因组学.
背景情况:
- 内向,即通过杂交和逆交物种之间基因的转移,可以使进化研究复杂化.
- 对于珊瑚礁生态系统至关重要的Acropora属有不清楚的多样化前侵入的历史.
- 之前对Acropora的差异时间估计没有考虑潜在的内进影响.
研究的目的:
- 为了调查Acropora珊瑚属中古代侵入的存在和程度.
- 评估内进化的对植物遗传重建和分歧时间估计在Acropora的影响.
- 探索内进的作用在Acropora的进化辐射.
主要方法:
- 来自多个Acropora物种的全基因组蛋白质编码序列的分析.
- 使用三重位置分析推断内进事件的推断.
- 使用多维缩放对核位点进行聚类,以评估遗传学异质性.
- 使用具有不同程度内进化的基因组进行分离时间估计.
主要成果:
- 在Acropora全基因组序列中检测到古代内侵的证据.
- 大约21.9%的三位点显示出内进化的证据,在多样化之前,遗传贡献高达30.9%.
- 核位置聚类中的异质性导致了各种各样的遗传学关系.
- 估计多样化的时间是中期到晚期的米奥森,当计入内进时.
结论:
- 古老的侵入性杂交在Acropora珊瑚的全基因组进化和辐射中发挥了重要作用.
- 内进事件发生在Acropora多样化之前,对它们的遗传构成做出了重大贡献.
- 准确的遗传学重建和差异时间估计需要考虑内进化的影响.
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