中文摘要：

以海南陵水、马来西亚、西沙、南沙4 个海域共101 尾波纹唇鱼（Cheilinus undulatus）作为研究对象,利用线粒体DNA ND1 基因序列对波纹唇鱼进行了遗传多样性分析.通过PCR扩增、克隆与序列测定技术,获得ND1 基因序列长度为975 bp,其多态性遗传参数统计显示,101个个体存在13 个变异位点,14 个单倍型,总群体单倍型多样性（Hd）为0. 292,平均核苷酸差异数（K）为0.335,核苷酸多样性指数（Pi）为0.000 35,表现出遗传多样性处于较低水平.Tajimas D中性检验结果为-1.768 09 （P=0.031）表明波纹唇鱼在历史上经历过近期群体扩张或瓶颈效应.分子方差分析（AMOVA） 表明遗传变异来自群体内.该结果可为今后波纹唇鱼的种质资源保护工作提供必要的科学依据.

英文摘要：

In this study, the genetic diversity and divergence of Cheilinus undulatus were studied based on the analysis ofmtDNA ND1 gene sequence from 101 individuals of four geographical populations including those from Lingshui （n=31）,Malaysia （n=20）, Xisha （n=14）, and Nansha （n=36）. By the PCR and cloning techniques, we got 975 bp sequences of the ND1gene. Thirteen variable sites and fourteen haplotypes were obtained in this study. The whole haplotype diversity （Hd） of allindividuals was 0.292, and the average nucleotide differences （K） and nucleotide diversities （Pi） were 0.335 and 0.000 35,respectively. The results demonstrated that the genetic diversity was low. The data of Tajimas’D test （-1.768 09, P=0.031）suggested that Cheilinus undulatus underwent through recent group expansion or bottleneck effect. The AMOVA analysisshowed that a large proportion of variation was contributed within the population of Cheilinus undulatus. These results mightbe very useful for the protective measures for this species.