分子进化和完整的质体基因组的分子进化和遗传学分析的Cotinus (Anacardiaceae) 的
Qiaoyun Liu1, Nan Yang1, Wenpan Dong1
1School of Ecology and Nature Conservation Beijing Forestry University Beijing China.
Ecology and evolution
|June 1, 2023
概括
这项研究对Cotinus种类的叶绿体基因组进行了测序,揭示了家族遗传关系和进化分歧. 这些发现证实了Cotinus作为一个单类群体,对适应性辐射有洞察力.
科学领域:
- 植物基因组学 植物基因组学
- 分子进化是分子进化的过程.
- 人类遗传学 是一个学科.
背景情况:
- 科提努斯的分类学传统上依赖于叶子形态学,限制了分子进化和原生学研究.
- 科蒂努斯的基因组数据以前很少,这阻碍了全面的进化分析.
研究的目的:
- 测序和分析所有公认的Cotinus种类的叶绿体 (cp) 基因组.
- 调查cp基因组特征,进化和属内遗传学关系.
- 为了理解Cotinus的进化分歧和适应辐射.
主要方法:
- 对所有公认的Cotinus taxa (三种,四种) 的叶绿体基因组进行测序.
- 对cp基因组特征和演变进行比较分析.
- 使用完整cp基因组,蛋白质编码基因和核ITS数据进行遗传学推断.
- 选择压力分析和差异时间估计.
主要成果:
- 科蒂努斯cp基因组呈现出典型的四分制结构 (158,865160,155bp),其中113114个基因.
- 七个非编码区域和四个编码区域被确定为分子标记物的分离热点.
- 在matK和rps8基因上检测到阳性选择.
- 遗传学分析证实了科提纳斯是单ophyletic,但科提纳斯coggygria作为非单ophyletic.
- 进化分歧始于中欧纪,与中米欧纪的快速适应辐射.
结论:
- 这项研究提供了对Cotinus. chloroplast基因组进化和原型的新见解.
- 这些发现增强了我们对这种装饰植物属的进化历史和多样化的理解.
- 已识别的分离区域可以作为未来Cotinus研究的有价值的分子标记.
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