使用整合性形态进化方法,解读有争议的状动物属Conchophthirus中的遗传学关系和界定物种界限,使用整合性形态进化方法
1Department of Zoology, Comenius University in Bratislava, 842 15 Bratislava, Slovak Republic; Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, PR China.
Molecular phylogenetics and evolution
|September 24, 2023
概括
这项研究重新分类了共生状动物Conchophthirus,揭示它与其他状动物没有密切的关系. 分子和形态分析显示,其最近的亲属是自由生活的Dexiotricha和内共生的Haptophrya.
科学领域:
- 亲生组织学 亲生组织学 亲生组织学
- 进化生物学 进化生物学
- 微生物生态学 微生物生态学
背景情况:
- 像Conchophthirus这样的共生纤毛动物的分类是具有挑战性的,因为它们适应了宿主.
- 在scuticociliates中的Conchophthirus的基因位置仍然不太清楚.
研究的目的:
- 为了研究Conchophthirus的单和物种界限.
- 为了确定Conchophthirus与其他共生和自由生活的scuticociliates的遗传关系.
主要方法:
- 单变量和多变量形态测量被应用到康科菲拉斯标本.
- 遗传学分析利用了144个线粒体和核标记物的新序列.
- 进行了基于2D的分子和遗传学分析.
主要成果:
- 形态测量和遗传学分析产生了同质的群,支持Conchophthirus monophyly.
- 正如之前所假定的那样,康科菲斯病毒与Pleuronematida和Philasterida没有密切的关系.
- Dexiotricha和Haptophrya被确定为Conchophthirus的最近的亲戚.
结论:
- 康科弗蒂鲁斯,德西奥特里卡和哈普托弗里亚组成了一个早期分支的孤儿类,位于scuticociliates内部.
- 这一发现挑战了仅仅基于形态学的传统分类.
- 共生和自由生活的类动物可以表现出深刻的遗传学分歧.
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