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	更新世气候波动和海南岛和其邻近大陆变色树蜥(Calotes versicolor)的分化
	黄勇1,2; 郭宪光1; 蔡波1,2; 饶定齐4; 王跃招[*]1; 李家堂1; 史海涛1,3; 李俊1,2
	2011
会议名称	四川省动物学会第九次会员代表大会暨第十届学术研讨会
会议日期	2011-03-18
会议地点	中国四川成都
关键词	历史动态 线粒体 变色树蜥 系统发育 种群结构
其他题名	Pleistocene climatic cycling and diversification of the Oriental garden lizard (Calotes versicolor) in Hainan Island and its adjacent Mainland
通讯作者	arcib@cib.ac.cn
中文摘要	更新世气候反复波动导致陆桥的反复升降对现在物种地理分布格局和遗传结构有 影响。我们用线粒体 DNA 作为分子标记对变色树蜥的谱系地理格局进行研究，共采集了 39 个地理种群 212 个体，其中在海南岛采集有 35 个地理种群，邻近的大陆(广东、广西、 香港和越南)采集有 4 个地理种群。我们扩增了 2663bp 线粒体 DNA(包括 ND2、CO1 和 tRNA)，接着运用了分区贝叶斯方法构建了单倍型系统发育树并估算了各支分化时间。系 统发育分析表明变色树蜥形成了两个很明显的遗传分支：一支(Southeastern clade)的地理 种群主要分布在海南岛中部和南部的五指山脉，另一支(Northwestern clade)的地理种群主 要分布在邻近的大陆和海南岛其他地方。分子钟估算这两支分化主要在 1.53(0.97~2.20) 百万年，而 Southeastern clade 和 Northwestern clade 的最近共同祖先出现时间分别是 0.32(0.13~0.54)百万年和 0.76(0.38~1.23)百万年，与更新世气候波动导致陆桥反复出现时 间相吻合。我们的结果还表明这两个遗传分支近期都经历过种群大小和范围扩张，然而 Northwestern clade 的种群大小变化比 Southeastern clade 更明显。因此，我们的分析结果 表明五指山脉对山脉两边的种群基因流阻隔作用有限，琼州海峡和北部湾对海南岛和大 陆的种群基因流也没有阻隔作用。变色树蜥的种群遗传结构分化明显和复杂的种群动态 历史，特别是 Northwestern clade，可能是由于更新世的气候反复波动而导致。
英文摘要	The cyclic upheaval and submergence of land bridges resulted from the Pleistocene climate oscillations are assumed to have shaped the present species’ geographical distributions and their genetic structure. We investigated the phylogeographic patterns using the mitochondrial DNA (ND2 through COI gene, in total 2663 base pairs) of 212 individuals of the Oriental garden lizard, Calotes versicolor, sampled from 35 of the Hainan Island and four adjacent Mainland localities. We performed partitioned Bayesian phylogenetic analyses assuming a relaxed molecular clock to reconstruct phylogenetic relationships among extant haplotypes and to give an explicit temporal scale to the timing of clade divergence. The phylogenetic analyses indicate two genetically distinct clades: one (Southeastern clade) representing populations mainly restricted to the central and southern Wuzhi mountain ranges in Hainan Island, and the other (Northwestern clade) representing populations mainly from the remaining sites of Hainan Island and its adjacent Mainland. The two clades diverged at about 1.53 million years ago (Ma) with 95% confidence interval ranging from 0.97 to 2.2 Ma, coinciding with the Pleistocene, a time of extensive climatic cycling. The TMRCA of the Northwestern clade is estimated about 0.76 Ma, the Southeastern clade about 0.32 Ma, corresponding to known periods of land-bridge repeatedly exposed and disappeared during the Pleistocene. Our results also indicate a population size and range expansion of the two clades. However, the Northwestern clade displayed a more marked signal of population size fluctuation than the Southeastern clade. These results, and those of the population genetic analyses, therefore suggest that the Wuzhi mountain ranges may act as limited barriers to gene flow between populations on the both sides of the mountain ranges, and nor do the Qiongzhou Strait and Gulf of Tonkin. The existence of a geographical structure among populations, and the complex and dynamic history of this species, especially of the Northwestern clade, may result from the synergistic effect of Pleistocene climatic fluctuation.
会议录出版者	四川省动物学会
语种	中文
内容类型	会议论文
源URL	[http://159.226.149.26:8080/handle/152453/11211]
专题	昆明动物研究所_兽类生态与进化
作者单位	1.中国科学院成都生物研究所，成都 610041 2.中国科学院研究生院，北京 100049 3.海南师范大学生命科学院，海口 571158 4.中国科学院昆明动物研究所，昆明 650223
推荐引用方式 GB/T 7714	黄勇,郭宪光,蔡波,等. 更新世气候波动和海南岛和其邻近大陆变色树蜥(Calotes versicolor)的分化[C]. 见:四川省动物学会第九次会员代表大会暨第十届学术研讨会. 中国四川成都. 2011-03-18.

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