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古老的网状结构,不完整的血统分类以及在角草多样化光之初的化物进化

Gabriel Peñaloza-Bojacá¹, Adaíses Maciel-Silva¹, D Christine Cargill²

¹Departamento de Botânica, Universidade Federal de Minas Gerais, Brazil.

Annals of botany

|January 17, 2025

概括

不完整的血统分类和古老的网状结构显著塑造了角草的进化,复杂化了它们的基因组. 角的多样化模式与其他植物群体相似,类进化提供了两个可信的进化场景.

科学领域:

植物进化生物学植物进化生物学
人类基因组学是什么?
植物的演化过程

背景情况:

解决角草的基因是理解独特的特征演变的关键,例如化物.
之前的基因组分析揭示了Leiosporoceros的位置的复杂性.
不完整的血统分类 (ILS) 和古老的网状结构可能解释了遗传学不一致.

研究的目的:

解决角草的相互关系,了解它们的多样化.
为了研究ILS和古老网膜在角草进化中的作用.
为了探索金字塔形状的进化历史.

主要方法:

测序了79个角草标本中的234个核基因中的405个外基因.
使用连接和凝聚基因树分析推断的物种类型.
评估了古老的网状结构,ILS,并使用化石校准估计了分歧时间.

主要成果:

极端的基因树不一致性挑战了Leiosporoceros的姐妹关系.
遗传学不一致性归因于ILS和古老的网状结构 (基因流).
角草的多样化始于石灰岩时期,在白纪和古纪有很大的分歧.

结论:

ILS和古老的网状结构是角草进化历史的关键因素.
角的多样化模式与其他主要植物系中观察到的模式一致.
提出了两个pyrenoid进化的假设,涉及从祖先的保留或适应碳素二氧化碳的下降,这两者都需要性格的收益和损失.

关键词:

布里奥菲特 (Bryophytes) 是一种植物.在二氧化碳水平上.纪 - 古纪的边界.进化历史的演化历史基因流动是基因的流动.杂交方式的混合化.遗传学上的不一致性快速多样化的快速多样化

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