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| 中国常见贻贝基于28S rDNA序列的系统发育分析 |
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郭笳1,2, 谢慧盈2, 张振1,3, 胡利莎1,4,3, 刘玉盟1,4,3, 马培振1,3, 王海艳1,3, 李翠1,3
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1.中国科学院海洋研究所 青岛 266071;2.中国海洋大学 青岛 266100;3.中国科学院海洋大科学研究中心 青岛 266071;4.中国科学院大学 北京 100049
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| 摘要: |
| 贻贝隶属于软体动物门（Mollusca）、双壳纲（Bivalvia）、翼形亚纲（Pteriomorphia）、贻贝目（Mytilida）、贻贝超科（Mytiloidea），大约有400种贻贝分布在世界各地，可适应淡水、潮间带至深海多种生境。本实验以贻贝科6亚科12属28种中国沿海常见贻贝的28S rDNA为目的片段，构建系统发育进化树，运用最大似然法和贝叶斯推演法分析了贻贝科的系统发生，并追踪贻贝科物种系统演化历史。结果显示：贻贝亚科Mytilinae、偏顶蛤亚科Modiolinae、石蛏亚科Lithophaginae均非单系群。在属阶元，深海偏顶蛤属Bathymodiolus、贻贝属Mytilus和股贻贝属Perna为单系群。本研究发现应接受将原隔贻贝属Septifer分为Septifer属和Mytilisepta属的分类提议；应接受将原石蛏属Lithophaga中的膜石蛏亚属Leiosolenus提升至属的地位的分类提议。此外，短齿蛤属Brachidontes的单系性不被支持，刻缘短齿蛤Brachidontes setiger并未与短齿蛤属其他物种在系统发育树上聚拢，亲缘关系较远，为不同属物种，建议恢复刻缘短齿蛤原属名Volsella（Dunker，1857）。 |
| 关键词: 贻贝 28S rRNA 系统发育 |
| DOI：10.11693/hyhz20200200038 |
| 分类号:P745;Q19 |
| 基金项目:国家自然科学基金项目，41776179号，41906083号；中国海域贻贝超科系统分类与关键性状演化研究；十三五“蓝色粮仓科技创新”国家重点研发计划项目，2019YFD0901303号；中国科学院战略生物资源能力建设项目，KFJ-BRP-017-40号。 |
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| PHYLOGENETIC ANALYSIS BASED ON PARTIAL 28S RDNA SEQUENCE OF FAMILY MYTILIDAE IN CHINA |
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GUO Jia1,2, XIE Hui-Ying2, ZHANG Zhen1,3, HU Li-Sha1,4,3, LIU Yu-Meng1,4,3, MA Pei-Zhen1,3, WANG Hai-Yan1,3, LI Cui1,3
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1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.Ocean University of China, Qingdao, 266100;3.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4.University of Chinese Academy of Science, Beijing 100049, China
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| Abstract: |
| There are about 400 species of marine mussel (Mollusca:Bivalvia:Pteriomorphia:Mytilida:Mytiloidea:Mytilidae) living all over the world, and they adapt to the highly variable habitats in both intertidal zone and deep sea. In this study, 28S rDNA gene of species in this family along Chinese coasts were collected and phylogenetic trees were reconstructed by maximum likelihood and Bayesian inference methods. The results showed that subfamilies Mytilinae, Modiolinae, and Lithophaginae were not monophyletic groups. At genus level, Bathymodiolus, Mytilus, and Perna are monophyletic groups. The result supports the new classification scheme for genus Septife that should be divided into Septifer and Mytilisepta and the elevation of subgenus Leiosolenus (belonging to genus Lithophaga) to genus level. However, the monophyly of genus Brachidontes is not supported. The Brachidontes setiger has larger genetic distance from other species in the genus and they did not form a single clade in phylogenetic trees. Therefore, it is suggested Brachidontes setiger belongs to a different genus and we should still use its original genus name, Volsella (Dunker, 1857). |
| Key words: Mytilidae 28S rRNA molecular phylogeny |