Discovery of sympatric cryptic species within Gekko hokouensis (Gekkonidae: Squamata) from the Okinawa Islands, Japan, by use of allozyme data
Discovery of sympatric cryptic species within Gekko hokouensis (Gekkonidae: Squamata) from the Okinawa Islands, Japan, by use of allozyme data
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利用等位酶数据发现日本冲绳群岛的 Gekko hokouensis（壁虎科：Squamata）同域隐秘物种
DOI：
10.1046/j.1463-6409.2001.00053.x
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发表时间：
2001
影响因子：
2.5
通讯作者：
H. Ota
中科院分区：
文献类型：
--
作者：
M. Toda;T. Hikida;H. Ota
对来自东亚岛屿的壁虎类蜥蜴样本的电泳调查表明，在日本琉球群岛冲绳群岛的五个岛屿上，存在两个在基因上存在分歧但在形态上几乎相同的实体。这些个体虽然具有河口棉的所有外部性状诊断，但在所检测的30个基因座中，有6到8个表现出固定的等位基因差异，总体遗传距离很大[Nei‘s(1978)D=0.489-0.654]。在冲绳群的熊岛和托纳基岛，这两个实体是从相同的微生境中采集的。这些结果表明，这两个实体代表不同的生物物种。这两个来自冲绳群的神秘物种与来自其他岛群的‘G.hokouensis’的遗传比较表明，一个广泛分布于东亚岛国地区，而另一个仅限于冲绳群。文中还讨论了本研究结果对‘河口棉’形态进化的意义。
An electrophoretic survey of samples of the gekkonid lizard, Gekko hokouensis, from the East Asian islands demonstrated that two genetically divergent, but morphologically almost identical, entities occur on five islands of the Okinawa Group, Ryukyu Archipelago, Japan. These entities, while sharing all of the external character states diagnostic of G. hokouensis, exhibited fixed allele differences at six to eight out of 30 loci examined and great overall genetic distances [ Nei’s (1978)D = 0.489–0.654]. On Kumejima and Tonakijima Islands of the Okinawa Group, the two entities were collected together from identical microhabitats. These results indicate that the two entities represent separate biological species. Genetic comparisons of these two cryptic species from the Okinawa Group with ‘G. hokouensis’ from other island groups revealed that one occurs broadly in the insular region of East Asia, whereas the other is restricted to the Okinawa Group. Implications of the present findings for the morphological evolution of ‘G. hokouensis’ are also discussed.