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Molecular identification and phylogeny of Channa species from Indo-Myanmar biodiversity hotspots using mitochondrial COI gene sequences

机译:利用线粒体COI基因序列对印缅生物多样性热点香奈树种进行分子鉴定和系统发育

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摘要

The fishes of genus Channa are widely recognized as staple food fish in Asia. However, the identification and phylogeny of species available in the Indian subcontinent are poorly understood. In the present study, 12 species of genus Channa were investigated using a partial sequence of the COI gene of mitochondrial genome to differentiate among them and study their phylogenetic relationship. A total of 17 haplotypes was identified in the present study and interspecies p-distances were found higher than the intraspecies distances. The highest interspecies genetic distance (0.2179) was between Channa ornatipinnis and Channa diplogramma, where as the lowest genetic distance (0.0417) was between Channa gachua and Channa stewartii. The average interspecies and intraspecies genetic distances were 0.1731 and 0.0015, respectively and no intra or interspecies distance overlaps were observed. Phylogenetic tree analyses showed three major clusters which are genetically distant from each other and exhibit distinct phylogenetic resolution. The present study also supports that Indian species Channa diplogramma warrants taxonomic recognition as being distinct from Southeast Asian species Channa micropeltes. The partial sequence of the COI gene provided sufficient phylogenetic information to distinguish all the twelve species of Channa. (C) 2014 Elsevier Ltd. All rights reserved.
机译:香纳属的鱼类在亚洲被广泛认为是主食鱼类。但是,人们对印度次大陆可用物种的鉴定和系统发育了解甚少。在本研究中,使用线粒体基因组COI基因的部分序列研究了Channa属的12种,以区分它们,并研究了它们的系统发生关系。在本研究中共鉴定出17种单倍型,并且发现种间p距离高于种内距离。种间遗传距离(0.2179)最高,位于Channa ornatipinnis和Channa diplogramma之间,而最低的遗传距离(0.0417)位于Channa gachua和Channa stewartii之间。种间和种间的平均遗传距离分别为0.1731和0.0015,并且没有观察到种内或种间的距离重叠。系统发育树分析显示了三个主要的簇,它们在遗传上彼此相距遥远,并且表现出独特的系统发育分辨率。本研究还支持印度物种Channa diplogramma具有与东南亚物种Channa微丸不同的分类学认可。 COI基因的部分序列提供了足够的系统发育信息,以区分所有的Channa的十二种。 (C)2014 Elsevier Ltd.保留所有权利。

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