Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210046, China.
Mol Ecol. 2010 Jun 1;19(12):2490-500. doi: 10.1111/j.1365-294X.2010.04660.x.
The genetic structure and demographic history of an endemic Chinese gecko, Gekko swinhonis, were investigated by analysing the mitochondrial cytochrome b gene and 10 microsatellite loci for samples collected from 27 localities. Mitochondrial DNA data provided a detailed distribution of two highly divergent evolutionary lineages, between which the average pairwise distance achieved was 0.14. The geographic division of the two lineages coincided with a plate boundary consisting of the Qinling and Taihang Mts, suggesting a historical vicariant pattern. The orogeny of the Qinling Mts, a dispersal and major climatic barrier of the region, may have launched the independent lineage divergence. Both lineages have experienced recent expansion, and the current sympatric localities comprised the region of contact between the lineages. Individual-based phylogenetic analyses of nucDNA and Bayesian-clustering approaches revealed a deep genetic structure analogous to mtDNA. Incongruence between nucDNA and mtDNA at the individual level at localities outside of the contact region can be explained by the different inheritance patterns and male-biased dispersal in this species. High genetic divergence, long-term isolation and ecological adaptation, as well as the morphological differences, suggest the presence of a cryptic species.
通过对 27 个采样点的线粒体细胞色素 b 基因和 10 个微卫星位点进行分析，研究了中国特有壁虎，喜山鬣蜥的遗传结构和种群历史。线粒体 DNA 数据提供了两个高度分化的进化谱系的详细分布情况，两者之间的平均成对距离达到了 0.14。这两个谱系的地理分布与由秦岭和太行山脉组成的板块边界一致，表明存在历史上的地理隔离模式。秦岭山脉的造山运动是该地区的一个扩散和主要气候屏障，可能引发了独立谱系的分化。这两个谱系都经历了最近的扩张，目前的同域种群包括了谱系接触的区域。基于核 DNA 的个体水平的系统发育分析和贝叶斯聚类方法揭示了与 mtDNA 相似的深度遗传结构。在接触区域之外的局部地区，核 DNA 和 mtDNA 之间的个体水平的不一致可以用该物种的不同遗传模式和雄性偏向扩散来解释。高遗传分化、长期隔离和生态适应，以及形态差异，表明存在一个隐种。
