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《Journal of Ningxia University(Natural Science Edition)》 2008-02
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Comparison of Cytochrome b Gene Sequences and Phylogenetic Analysis of Partial Libellulidae (Odonata: Anisoptera)

Zhang Dazhi1,Yang Guohui2,Zheng Zhemin3(1.School of Life Science,Ningxia University,Yinchuan 750021,China;2.School of Life Science and Chemistry,Dali University,Dali 671000,China;3.Institute of Zoology,Shaanxi Normal University,Xi'an 710062,China)  
Based on 576 bp sequences of Cytb gene by MEGA 2.0 biosoftware,the nucleotide composition and the phylogenetic relationship among 8 species(Libellula depressa,Pantala flavescens,Trithemis festive,Trithemis aurora,Diplacodes trivialis,Neurothemis fulvia,Palpoleura sex-maculata,Pseudothemis zonata) in Libellulidae were dealt with.The results showed that the average contents of T,C,A and G are 37.0%,18.3%,31.3% and 13.4%.The contents of A+T(68.3 %) is obviously higher than that of G+C(31.7 %),and come up to 81.0 % at the third position of cordon.The replacement of nucleotides mostly occurs at the third position.Employing Mnais auripennis and Neurobasis chinensis as outgroups,the phylogenetic trees shows that the relationship between Pseudothemis and Trithemis are more closed than that other genera.Neurothemis and Palpoleura are the sister group of Diplacodes,Libellula and Pantala.
【Fund】: 宁夏自然科学基金项目资助(NZ0707);; 宁夏大学自然科学基金项目资助(NS0511)
【CateGory Index】: Q96
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