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中国农学通报 ›› 2020, Vol. 36 ›› Issue (17): 157-164.doi: 10.11924/j.issn.1000-6850.casb20190500146

所属专题: 生物技术 水产渔业

• 水产·渔业 • 上一篇    

秀丽白虾线粒体16S rRNA基因序列及长臂虾亚科系统进化初步分析

张敏莹1, 徐东坡1, 周彦锋1, 方弟安1, 刘凯1, 潘泽钰2   

  1. 1 农业农村部长江下游渔业资源环境科学观测实验站,中国水产科学研究院淡水渔业研究中心,江苏无锡 214081
    2 南京农业大学渔业学院,江苏无锡 214081
  • 收稿日期:2019-05-15 修回日期:2019-07-16 出版日期:2020-06-15 发布日期:2020-06-09
  • 作者简介:张敏莹,女,1974年出生,湖北应城人,副研究员,硕士,研究方向:渔业资源及种质保护。通信地址:214128 江苏省无锡市滨湖区雪浪街道薛家里69号 淡水渔业研究中心(南区)水生生物资源室,Tel:0510-85390025,E-mail:zhangmy@ffrc.cn。
  • 基金资助:
    国家科技基础条件平台建设运行项目“长江中下游水产种质资源标准化整理、整合与共享”(2019DKA30470-003)

Preliminary Analysis on Mitochondrial 16S rRNA Gene Sequence of Exopalaemon modestus and Phylogeny of Palaemoninae

Zhang Minying1, Xu Dongpo1, Zhou Yanfeng1, Fang Di'an1, Liu Kai1, Pan Zeyu2   

  1. 1 Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, CAFS, Wuxi Jiangsu 214081
    2 College of Fisheries, Nanjing Agricultural University, Wuxi Jiangsu 214081
  • Received:2019-05-15 Revised:2019-07-16 Online:2020-06-15 Published:2020-06-09

摘要:

旨在了解秀丽白虾线粒体16S rRNA基因序列及线粒体16S rRNA基因在虾类物种鉴定及系统分类中的作用,采用PCR特异扩增测序的方法,对秀丽白虾(Exopalaemon modestus)的16S rRNA基因片段进行了分析,并探讨了长臂虾亚科虾类的系统发育关系。结果表明:54尾秀丽白虾16S rRNA基因共发现5种单倍型和8个变异位点。13种长臂虾间的遗传距离在0~0.2614之间,7个属间的遗传距离为0.1344~0.2769。NJ法和ME法构建的系统进化树显示,除洁白长臂虾外,同属的不同种先聚成一支,其中东方白虾和脊尾白虾亲缘关系最近。长臂虾属和小长臂虾属亲缘关系很近,长臂虾属为多起源;推测洁白长臂虾与宽额拟瘦虾之间的分化时间距今约22.34百万年。本研究结果表明,线粒体16S rRNA基因序列不能单独对长臂虾亚科虾类进行物种鉴定,但进行系统分类和亲缘关系分析是可行的。

关键词: 秀丽白虾, 16S rRNA基因, 长臂虾亚科, 分子系统进化

Abstract:

To study 16S rRNA gene sequence of Exopalaemon modestus and the role of 16S rRNA gene in species identification and phylogenetic taxa, mitochondrial 16S rRNA gene sequence of Exopalaemon modestus was analyzed by PCR amplification and sequencing. The phylogenetic relationships of the subfamily (Palaemoninae) were also discussed. The results showed that 5 haplotypes and 8 variable loci were found in 54 individuals. The genetic distance among 13 species of shrimps ranged from 0 to 0.2614. The genetic distance among 7 genus ranged from 0.1344 to 0.2769. The molecular phylogenetic trees constructed by NJ and ME method indicated that different species of the same genus clustered into one branch first except Palaemon concinnus, and Exopalaemon orientis was the closest related species to Exopalaemon carinicauda. Palaemon and Palaemonetes had the most closet phylogenetic relationship and the genus Palaemon was polyphyletic. Palaemon concinnus and Leandrites deschampsi were differentiated about 22.34 million years ago presumably. This study indicates that mitochondrial 16S rRNA gene could not be used to identify the species of the subfamily Palaemoninae alone, but it is feasible for systematic classification and analysis of genetic relationship.

Key words: Exopalaemon modestus, 16S rRNA gene, Palaemoninae, molecular phylogeny

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