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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 31, No. 4, 2010, pp. 375-380
Bioline Code: zr10050
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 31, No. 4, 2010, pp. 375-380

 en Analysis of Amphioxus Geographic Populations in the West Pacific Ocean Based on COX 1 Gene
Li, Wei-Ye; Zhong, Jing & Wang, Yi-Quan


Amphioxus (lancelet) is an important model animal in the field of Evo-Devo study. However, the specimens for laboratorial experiments are usually sampled directly from the field. Thus, it is necessary to correctly identify species and evaluate the genetic diversity of geographic populations. In the present investigation, we amplified and sequenced COX 1 gene of amphioxus collected from various localities of the West Pacific Ocean and downloaded all available sequences of the gene from NCBI. Based on those sequences data, we constructed NJ tree to decide the taxonomic status of those amphioxus and performed AMOVA analysis to estimate genetic diversities among geographic populations and individuals. The current results supported the validity of the three amphioxus species, Branchiostoma malayanum check for this species in other resources , B. belcheri and B. japonicum. We also proposed that some amphioxus species names recorded in NCBI sequence database might be inaccurate. Genetic analysis on the geographic populations of amphioxus species suggested that each examined amphioxus species have a high level of genetic diversity. However, the genetic divergences among geographic populations of the same species are indetectable, indicating a frequent gene flow among them.

Amphioxus; COX 1 gene; Geographic population; Species

© Copyright 2010 Kunming Institute of Zoology, the Chinese Academy of Sciences
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