从热带气候出发的重复转移,之前是整个基因组的重复
Tom Carruthers1, Deise J P Gonçalves1, Pan Li2
1Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
The New phytologist
|October 23, 2024
概括
全基因组复制 (WGD) 和气候变化促进了Ericales序列中开花植物的爆炸性多样化. 这些进化事件,以及生命历史的变化,使物种能够适应不同的气候.
科学领域:
- 进化生物学是进化的生物学.
- 植物科学 植物科学
- 基因组学就是基因组学.
背景情况:
- 气候极大地限制了开花植物谱系的地理分布和多样化.
- 整个基因组重复 (WGD),基因树冲突和生命历史转移被假定有助于克服气候限制.
- 序列Ericales,大约有14000个物种,表现出不同的气候耐受性,使其成为研究这些进化现象的理想系统.
研究的目的:
- 研究气候变化与进化现象 (如WGD,基因树冲突和Ericales序列的生命历史变化) 之间的关联.
- 了解这些因素如何促进多样化率和Ericales内部气候容忍度的演变.
主要方法:
- 用转录基因数据估计的家族遗传树,64个叶绿体基位和Angiosperms353核基位,分别包含147,4508和2870种Ericales物种.
- 分析与WGD相关的气候变化,基因树冲突,生命历史特征和使用重建的家族遗传树的多样化率.
主要成果:
- 在Ericales中,早期分歧的血统表现出极短的分支,高基因树冲突,以及至少一个WGD.
- 在气候变化 (特别是从热带气候转移),随后的WGD和后代血统的生命历史变化之间发现了显著的关联.
- 丰富物种的Ericales类的爆炸性起源与这些早期的进化事件有关,包括WGD和基因树冲突.
结论:
- 在物种丰富的Ericales群中,各种气候耐受性的演变与WGD和生命历史修改密切相关.
- WGD和相关现象似乎是开花植物快速多样化和适应不同气候的关键驱动因素.
- 了解这些进化机制,可以了解全球陆地环境中开花植物的广泛成功.
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