建模组合异质性解决了开花植物的深层分化
Yongli Wang1, Yan-Da Li2,3, Shuo Wang4
1Biofuels Institute, School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Plant diversity
|March 5, 2025
概括
开花植物 (芽植物) 显示出快速的古代辐射. 使用先进模型进行的新型遗传学分析解决了主要的血管种系之间的深层关系,澄清了它们的进化历史.
科学领域:
- 进化生物学 进化生物学
- 植物科学 植物科学
- 基因组学就是基因组学.
背景情况:
- 芽植物是主要的陆地植物,但它们的快速古老辐射复杂化了基因组分辨率.
- 以往使用大型数据集进行的基因组学研究改善了理解,但使得更深层次的关系,特别是 Mesangiospermae 之间的关系,受到争议.
研究的目的:
- 通过基因组规模数据,解决五大梅桑基亚种子系之间的有争议的相互关系.
- 为了评估不同种系遗传模型在解决古代快速辐射中的有效性.
主要方法:
- 使用来自塑体,线粒体和核源的基因组规模数据进行的家族基因组学分析.
- 场地异质模型 (例如,CAT-GTR+G4,LG+C20+F+G) 与场地同质或分区模型的应用和比较.
- 贝叶斯交叉验证和近似无偏差 (AU) 测试,以评估模型适合性和树的强度.
主要成果:
- 仅仅塑体和线粒体基因组就没有为深层基因生成提供足够的基因信号.
- 站点异质模型在解决关系方面明显优于简单模型.
- 切拉托菲拉莱斯被坚定地认为是单鸟的姐妹,这个分类的姐妹是magnoliids,Chloranthales和eudicots.
结论:
- 这项研究成功地解决了血管种的更深层次的系系,澄清了介质种谱系之间的关系.
- 建模组合异质性对于准确地解决植物进化中的快速辐射至关重要.
- 这项工作为了解开花植物的进化历史提供了一个强大的框架.
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