遗传学解决了Poales的脊柱,并识别了杂交和多重多体的信号
Huijun Wang1, Zhigang Wu1, Tao Li1
1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China.
Molecular phylogenetics and evolution
|August 29, 2024
概括
这项研究解决了Poales的进化历史,这是一个主要的植物秩序,揭示了关键的家族关系和多样化模式. 这些发现突显了全基因组重复和灭绝后事件对物种丰富性的影响.
科学领域:
- 植物进化生物学 植物进化生物学
- 人类遗传学 是一个学科.
- 血管精子多样化的多样化
背景情况:
- 池是一种大型的,经济上重要的血管种类,具有复杂的进化关系.
- 之前的遗传学研究面临挑战,原因是数据有限和分类型采样.
- 了解驱动类型丰富性变化的因素仍然是一个活跃的研究领域.
研究的目的:
- 使用全面的分类样本和基因组数据,重建Poales序列的强有力的系谱.
- 解决相互矛盾的遗传信号,并研究北极动物的进化历史和多样化.
- 探索全基因组重复 (WGD) 事件和灭绝后动态在塑造极地生物多样性的作用.
主要方法:
- 综合采样所有14个Poales家族和85个类型,以及外部组.
- 在核和塑基因组数据上使用凝聚和连接方法进行遗传学重建.
- 遗传学假设测试以评估冲突节点并识别WGD事件.
主要成果:
- 一个解决的脊柱分化为Poales,包括最早的分离家族 (Typhaceae和Bromeliaceae).
- 已经确立了Ecdeiocoleaceae/Joinvilleaceae与Poaceae的姐妹关系,以及xyrid类中的顺序分歧.
- 强烈支持PACMAD分类拓和26个假设的WGD事件的识别,K-Pg边界后的多样化率增加.
结论:
- 这项研究提供了一个强大的遗传学框架和极地动物的进化时间表.
- 细胞核异调,杂交和多重化有助于遗传学上的不确定性.
- 在K-Pg边界之后,Poal发生了显著的多元化,可能受到WGD事件的影响.
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