Phylogeography and population structure of the Reevese's Butterfly Lizard (Leiolepis reevesii) inferred from mitochondrial DNA sequences
Phylogeography and population structure of the Reevese's Butterfly Lizard (Leiolepis reevesii) inferred from mitochondrial DNA sequences
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DOI：
10.1016/j.ympev.2010.04.032
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发表时间：
2010-08-01
影响因子：
4.1
通讯作者：
Lin, Chi-Xian
中科院分区：
文献类型：
--
作者：
Lin, Long-Hui;Ji, Xiang;Lin, Chi-Xian
蝶蜥属（学名：Leiolepis）广泛分布于东南亚及华南沿海地区，其中瑞氏蝶蜥（Reevese's Butterfly Leiolepis reevesii）的分布范围最北，由越南至华南。为了评估L. reevesii，以及其种群结构和进化历史，我们测定了来自28个地点的448个个体的1004 bp的细胞色素B序列，几乎覆盖了整个蜥蜴的分布范围。共观察到140个变异位点，确定了93种单倍型。我们鉴定了三个遗传上不同的分支，其中分支A包括主要来自海南东南部的单倍型，分支B包括来自广东和海南北方的单倍型，分支C包括来自越南和中国其他地方的单倍型。进化枝A与其他两个进化枝有很好的区别和分歧。五指山和莺歌岭山脉是限制山系两岸种群间基因交流的重要屏障，而北部湾和琼州海峡则不是。一个合理的情况来解释我们的遗传数据是一个历史性的传播C reevesii从越南到海南，其次是第二波传播从海南到广东和广西。另一个同样合理的假设是，历史上分布广泛的人口是由海南山脉和海平面波动等替代因素构成的。(C)2010年爱思唯尔公司All rights reserved.
Butterfly lizards of the genus Leiolepis (Agamidae) are widely distributed in coastal regions of Southeast Asia and South China, with the Reevese's Butterfly Lizard Leiolepis reevesii having a most northerly distribution that ranges from Vietnam to South China. To assess the genetic diversity within L.. reevesii, and its population structure and evolutionary history, we sequenced 1004 bp of cytochrome b for 448 individuals collected from 28 localities covering almost the whole range of the lizard. One hundred and forty variable sites were observed, and 93 haplotypes were defined. We identified three genetically distinct clades, of which Clade A includes haplotypes mainly from southeastern Hainan, Clade B from Guangdong and northern Hainan, and Clade C from Vietnam and the other localities of China. Clade A was well distinguished and divergent from the other two. The Wuzhishan and Yinggeling mountain ranges were important barriers limiting gene exchange between populations on the both sides of the mountain series, whereas the Gulf of Tonkin and the Qiongzhou Strait were not. One plausible scenario to explain our genetic data is a historical dispersion of C reevesii as proceeding from Vietnam to Hainan, followed by a second wave of dispersal from Hainan to Guangdong and Guangxi. Another equally plausible scenario is a historically widespread population that has been structured by vicariant factors such as the mountains in Hainan and sea level fluctuations. (C) 2010 Elsevier Inc. All rights reserved.