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KMID : 0381120070290040427
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Genes and Genomics
2007 Volume.29 No. 4 p.427 ~ p.435
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Inferences in Leuciscinae (Pisces, Cyprinidae) Phylogeny and Taxonomy Based on Cytochrome B Sequence Distances and on Enzyme Loci Diversity
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Kartavtsev Yuri Ph.
Hanzawa Naoto
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Abstract
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Sequence divergence at cytochrome b mitochondrial gene (Cyt-b) and genetic distances at 30 protein loci were analyzed among Leuciscinae subfamily of cyprinid fishes. Four major conclusions were made: 1. There are four species of the genus Tribolodon that are well enough distinguished genetically both at sequence and allozyme data. All four species have DNA barcode tags (unambiguous per individual clustering at Cyt-b gene sequence) and diagnostic enzyme loci. 2. Nomination of a recently described dace species, Tribolodon nakamurai as the fourth separate species of the genus has fine support from both mtDNA gene sequences and nuclear protein loci. 3. Taxonomically the genus Tribolodon as well as Pseudaspius leptocephalus enter the tribe Pseudaspinini as defined by conventional approach; this status is well supported by genetic data from both mitochondrial and nuclear genome. Still the true phylogeny of the tribe Pseudaspinini requires further examination, including representatives of genera Phoxinus and Oreoleuciscus. 4. The origination and divergence of the species in Pseudaspinini are relatively recent historical events: 1-3 MYR.
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KEYWORD
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taxonomy, Sequence, p-distance, Cyt-b, minnows, enzyme loci
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