生物学杂志

生物学杂志

• 研究报告 • 上一篇    下一篇

基于线粒体COX1基因探讨夜鹭的分歧时间

  

  1. 1. 贵州师范大学 生命科学学院 植物生理与发育调控重点实验室, 贵阳 550025; 2. 贵州大学 生物多样性与自然保护研究中心, 贵阳 550025
  • 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 张明明，副教授，硕士生导师，研究方向为野生动物资源保护与利用，E-mail：zmm2005@163.com
  • 作者简介:王野影，讲师，研究方向为野生动植物保护，E-mail：Wangyeying0818@163.com
  • 基金资助:
    国家自然科学基金项目(31400353);贵州省科技计划重大专项(黔科合重大专项字\[2016\]3022-1号);贵州省科技计划项目(黔科合基础\[2017\]1129；黔科合LH字\[2014\]7682);贵州师范大学资助博士科研项目(0516008);贵大人基合字(2013)08号

The divergence reason of black-crowned night heron(Nycticorax nycticorax) explored based on COX1 genes

  1. 1. Key Laboratory of Plant Physiology and Development Regulation, School of Life Science,Guizhou Normal University, Guiyang 550025; 2. Biodiversity and Nature Conservation Research Center, Guizhou University, Guiyang 550025, China
  • Online:2019-06-18 Published:2019-06-18

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摘要：  物种分化过程与原因是进化生物学和生态学研究的热点问题之一，分化的本质为基因的分化。研究采用全球分布的夜鹭作为研究对象，基于线粒体COX1基因，分别采用贝叶斯法和最大似然法构建其系统发育树；采用放松分子钟的方法，利用鹳形目与鹈形目的分歧时间结点68.92百万年，与企鹅目的分歧时间67.12百万年，及鹈形目与企鹅目的分歧时间72.25百万年作为校正点，使用BEAST软件构建其分歧时间树，目的是利用分子手段探究夜鹭的分歧时间，并尝试推测其可能的分化因素。结果表明：夜鹭可依分布区域而分为两个支系，亚洲支系和美洲支系；距今56.74百万年左右，两支系分开；分歧原因可能与亚洲大陆和美洲大陆的分离有关。

关键词: 夜鹭, COX1基因, 系统发育关系, 分期年代评估

Abstract: The process and reason of species divergence is one of the hot issues in evolutionary biology and ecology field, the nature of species divergence is the gene differentiation. This research studied the globally distributed black-crowned night heron. A phylogenetic tree was constructed by using the method of bayesian and maximum likelihood based on mitochondrial COX1 gene. A time tree was built by the BEAST software using a relaxed molecular clock and three calibration points from the divergence time 68.92 million years between Ciconiiformes and Pelecaniformes, 67.12 million years between Ciconiiformes and Sphenisciformes, 72.25 million years between Ciconiiformes and Sphenisciformes. The purpose of this study is to use molecular methods to evaluate the divergence time of black-crowned night heron and infer the divergence factors. The results showed that the night heron could be divided into two lineages according to their distribution areas, the Americas lineage and Asia lineage. The divergence of the two lineages approximately happened 56.74 million years ago. The separation of the Asian continent and America caused this divergence. 

Key words: black-crowned night heron, COX1, phylogenetic relationship, divergence time estimation

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