他们被骗了! 在竹珊瑚 (Octocorallia: Scleralcyonacea: Keratoisididae) 的基因组中解决深层进化节点
Declan Morrissey1, Jessica D Gordon2, Emma Saso3
1Ryan Institute & School of Natural Sciences, University of Galway, University Road, Galway, Ireland.
Molecular phylogenetics and evolution
|August 28, 2023
概括
这项研究使用基因组学解决了深海珊瑚的关系,揭示了对Keratoisididae家族分类的新见解,并挑战了现有的组分. 建议对珊瑚微观结构进行进一步的研究,以改善分类学.
科学领域:
- 海洋生物学 海洋生物学
- 深海生态 深海生态
- 分类学和系统学.
背景情况:
- 深海八角珊瑚家族的Keratoisididae表现出多种类和多种类的属性,使生物多样性评估复杂化.
- 现有的分类依赖于三基因区域的分类,这缺乏更深层次的进化关系的解决方案.
- 一个字母数字系统被广泛使用,但需要家族遗传学改进.
研究的目的:
- 通过增强的家族基因组数据来解决克拉托基因科家族内更深层次的进化节点.
- 调查家族中预定义的字母和数字组之间的关系.
- 将基因组数据与形态学证据结合起来,以获得更强大的分类学理解.
主要方法:
- 从109个超保存元素和外型子 (保存元素) 库中生成的家族基因组数据.
- 包含了来自12名前期研究人员的保存元素数据.
- 使用最大概率和多个物种聚合在分类占用矩阵 (75%和50%的分类占用) 上构建的分类.
主要成果:
- 遗传学分析解决了更深层的节点,证实S1类珊瑚是其他竹珊瑚的姐妹类.
- 其余的竹珊瑚被分为两个主要分类:分类I (B1,C1,D1&D2,F1,H1,I4,J3) 和分类II (A1,I1,M1).
- 有证据表明,H1组不是单一的,D1/D2和A1/M1之间的划分需要重新考虑.
结论:
- 遗传学数据为了解克拉托西迪类动物的进化提供了一个强大的框架.
- 目前的字母数字分组需要根据新的遗传学证据进行修订.
- 微妙的形态学特征,比如硬质组织的微观结构,可能为分类学提供未来的诊断价值.
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