Analysis of cyt b gene sequences and molecular phylogeny of five species of Calopterygidae
LIU Fei~ 1* , ZHANG Da-Zhi~2, ZHENG Zhe-Min~ 3** (1. Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciecnes, Shanghai 200032, China; 2.College of Life Sciences, Ningxia University, Yinchuan 750021, China;3.Institute of Zoology, Shaanxi Normal University, Xi'an, Shaanxi 710062, China)
The nucleotide composition and phylogenetic relationship among 5 species in Calopterygidae were studied based on the 576 bp sequences of cyt b gene. The results showed that the average contents of T, C, A and G are 31.6%, 21.6%, 31.4% and 15.4%, respectively. The content of A+T (63%) is obviously higher than that of G+C (37%), reaching up to 66.4 % at the third position of the codons. Nucleotide substitution most likely occurs at the third position. With Bayadera melanopteryx as outgroup, the phylogenetic trees shows that Mnais and Matrona are monophyletic, but Mnais, differentiated earlier from their common ancestor, is a sister group to Matrona, Vestalis and Neurobasis.
【CateGory Index】： Q963