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通过线粒体基因组的Imparidentia (Mollusca:Bivalvia) 多样化的分类基因组解析

Yu Wang¹, Yi Yang¹, Lingfeng Kong¹

¹Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003 China.

Marine life science & technology

|August 28, 2023

概括

这项研究使用新的线粒体基因组数据解决了Imparidentia (双动物的超级序列) 的更高层次的基因组. 它澄清了主要血统之间的关系,并估计了从古生物学到中生学时代的分歧时间.

科学领域:

* 进化生物学进化生物学
* 基因组学是一个学科.
* 马拉科学 (malacology) 是一个学科.

背景情况:

* Imparidentia的更高层次的系谱,这是Heterodonta双的超级系,尽管双系谱学取得了进展,但仍不清楚.
*以前的研究缺乏足够的分辨率来充分阐明这个群体内的进化关系.

研究的目的:

* 通过使用新的线粒体基因组数据来解决Imparidentia的更高层次的系谱.
*为了澄清五个主要的Imparidentia血统之间的关系:Lucinida,Cardiida,Adapedonta,Myida和Venerida.
* 推断Imparidentia中关键类的分子分离时间.

主要方法:

*从两动物物种中测序了五个新的线粒体基因组: *Chama asperella*, *Chama limbula*, *Chama dunkeri*, *Barnea manilensis* 和 *Ctena divergens*.
* 基因组学分析,结合新的和现有的序列数据来重建Imparidentia树.
* 分子时钟分析与灭绝的种群进行校准,以估计分离时间.

主要成果:

*这项研究确定了Imparidentia的单,并解决了其主要血统的骨干关系.
* Lucinidae被确定为所有其他Imparidentia的姐妹群,而Thyasiridae则是其余种类的姐妹群 (不包括Lucinidae).
*Neoheterodontei,包括Venerida和Myida,已经解决,而Chamidae则在Venerida内筑巢.
* 分子分离时间表明,分类起源从奥尔多维纪到珀米纪时期,多样化跨越古生代到中生代.

结论:

*线粒体基因组数据为Imparidentia提供了得到良好支持的基因组,澄清了进化关系.
*这些发现提供了深入的进化历史和多样化模式的洞察力这双超级秩序.
*这项研究显著提高了我们对Imparidentia的基因组学和进化时间尺度的理解.

关键词:

没有表现的表现.线粒体基因组的基因组人类的家谱 (Phylogeny) 是一个学科.

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