生物多样性 ›› 2022, Vol. 30 ›› Issue (6): 22034.  DOI: 10.17520/biods.2022034

• 技术与方法 • 上一篇    下一篇

鲟鱼分子鉴定方法的整合应用

牛晓锋1,2, 王晓梅2,3, 张研2, 赵志鹏2,*(), 樊恩源2,*()   

  1. 1.上海海洋大学水产与生命学院, 上海 201306
    2.中国水产科学研究院, 北京 100141
    3.中国水产科学研究院长岛增殖实验站, 山东烟台 265800
  • 收稿日期:2022-01-15 接受日期:2022-04-19 出版日期:2022-06-20 发布日期:2022-06-20
  • 通讯作者: 赵志鹏,樊恩源
  • 作者简介:zhaozhipeng@cafs.ac.cn
    * E-mail: ecofan@foxmail.com;
  • 基金资助:
    中国水产科学研究院本级基本科研业务费(2020B001);中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金(2020TD11);国家自然科学基金(32101239);农业农村部物种品种资源保护费-水生野生动物保护专项研究(21301350001007)

Integration and application of sturgeon identification methods

Xiaofeng Niu1,2, Xiaomei Wang2,3, Yan Zhang2, Zhipeng Zhao2,*(), Enyuan Fan2,*()   

  1. 1. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306
    2. Chinese Academy of Fishery Sciences, Beijing 100141
    3. Changdao Enhancement and Experiment Station, Chinese Academy of Fishery Sciences, Yantai, Shandong 265800
  • Received:2022-01-15 Accepted:2022-04-19 Online:2022-06-20 Published:2022-06-20
  • Contact: Zhipeng Zhao,Enyuan Fan

摘要:

鲟形目物种是国家重点保护水生野生动物和CITES附录物种。其人工养殖种群数量众多, 种类丰富, 产品贸易量大, 但种类鉴定困难。本文在厘清当前鲟鱼商业类群的基础上, 通过分析现有种类鉴定方法, 整合了线粒体DNA遗传分析、SNP分析和微卫星DNA分析的鉴定方法, 探讨其鉴定国际贸易所涉鲟鱼的可行性。结果表明: 上述3种方法整合应用可在11种纯种鲟鱼及其正反杂交产生的杂交鲟范围内进行盲检。当前共有贸易鲟鱼36种, 其中杂交鲟14种, 杂交鲟的亲本共涉及9种鲟鱼。整合方法可准确鉴定小体鲟(Acipenser ruthenus)、达氏鳇(Huso dauricus)、施氏鲟(Acipenser schrenckii)、欧洲鳇(Huso huso)、闪光鲟(Acipenser stellatus)、高首鲟(A. transmontanus)两两杂交所产生的杂交鲟, 小体鲟为母本与纳氏鲟(Acipenser naccarii)或富氏鲟(A. fulvescens)或中华鲟(A. sinensis)产生的杂交鲟, 纯种的达氏鳇、高首鲟、富氏鲟和中华鲟, 但无法准确鉴定纯种的西伯利亚鲟(Acipenser baerii)和俄罗斯鲟(A. gueldenstaedti)以及父母本涉及此两种鲟鱼的杂交鲟。由于已开发的分子标记仍有限, 上述结果是对当前CITES贸易所涉鲟鱼鉴定的最大范围, 可以满足一些鲟鱼野生种群保护、贸易产品检测、种质资源管理等情景下的鉴定需求。

关键词: 鲟鱼, 种类鉴定, SNP, mtDNA, 微卫星DNA, 物种保护, 种质资源管理

Abstract

Aims: Sturgeons are important economic fishes with high market value. However, with the overfishing and the habitat destruction, the natural population of sturgeon have been declined worldwide. To address the challenges, all sturgeon species has been included in the appendices of CITES in 1997, besides, all species in natural waters of China are also included in the China’s protection catalogue under the Wildlife Protection Law. The identification of sturgeons still faces some difficulties. There are many identification methods for sturgeons, but most of them are applicable conditionally within range of species, respectively. This study aims to integrate available methods to meet more identification requirement in judicial authentication, wildlife supervision and germplasm resource management.
Methods: This study analyzed the identification methods and search the trade situation of sturgeons from the CITES database. Based on this, an integrated identification method which include mtDNA genetic analysis, Single Nucleotide Polymorphism (SNP) analysis and microsatellite DNA was established and analyzed to evaluate the effectiveness in identifying the 11 kinds of commercial sturgeon species and their hybrids.
Results: A total of 36 kinds of aquaculture sturgeons can be found from the CITES sturgeon trade database, including 14 hybrids and 22 purebred species. Although there are many methods to identify sturgeon species, molecular biological methods are proved to be effective identification methods. By integrating three identification methods above, blind detection is applicable to identify 11 purebred sturgeons and their hybrid sturgeons referring to the current international trade. Among them, two kinds of hybrid sturgeons can be accurately identified: (1) The hybrid sturgeons with parents from Acipenser ruthenus, Huso dauricus, A. schrenckii, Huso huso, A. stellatus or A. transmontanus. (2) The hybrid sturgeons whose female parent is A. ruthenus and male parent is A. naccarii or A. fulvescens or A. sinensis. Besides, the purebred H. dauricus, A. transmontanus, A. fulvescens and A. sinensis can be identified only under the current trade background. However, the hybrid sturgeons with parents from A. baerii or A. gueldenstaedti still cannot be accurately identified. Meanwhile, it is difficult to distinguish some purebred sturgeons among several of their hybrid sturgeons (A. baerii or A. gueldenstaedti as male parent).
Conclusion & suggestion: The identifiable sturgeon species are still limited based on the literature, the integration of the method above could satisfy the needs of sturgeon identification in some scenarios and is important for sturgeon conservation, trade product detection and germplasm resources management. Since many species still lack available markers for identification, developing new specific markers and further verifying the scope of existing specific markers should be encouraged with the international cooperation for the diverse sturgeon materials, especially for A. baerii and A. gueldenstaedti as parents of many hybrid sturgeons.

Key words: sturgeon, species identification, SNP, mtDNA, microsatellite DNA, sturgeon conservation, germplasm resources management