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Systematic Relationships of Hynobius okiensis among Japanese Salamanders (Amphibia: Caudata)

机译:日本Sal中Hynobius okiensis的系统关系(两栖动物:Caudata)

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摘要

We conducted an electrophoretic survey to examine systematic relationships of a lotic-breeding salamander Hynobius okiensis endemic to Dogo Island of the Oki Islands, Japan, with several lentic and lotic-breeding Japanese species. Genetically H. okiensis with 2n=56 chromosomes was closer to the lentic-breeding H. nebulosus group (H. nebulosus and H. dunni) with the same chromosome number than to the lotic-breeding H. naevius group (H. naevius and H. kimurae) and H. boulengeri with 58 chromosomes. Chromosome number reduction from 58 to 56, possibly accompanied with a change in breeding environment from streams to still waters, is estimated to have first occurred in the nebulosus group of Hynobius. A reversal only in breeding habits then seems to have followed in steep, montane environments of the small island of Dogo, resulting in the speciation of H. okiensis.
机译:我们进行了一项电泳调查,以检查一种流行于日本冲绳群岛的道后岛的繁殖sal sal(Hynobius okiensis)与一些日本短毛象和繁殖ic的系统关系。从遗传上讲,具有2n = 56个染色体的O.ensis与具有相同染色体数目的带透镜繁殖的H. nebulosus组(H. nebulosus和H. dunni)相比,更接近于繁殖繁殖的H. naevius组(H. naevius和H.)。 (kimurae)和H. boulengeri具有58条染色体。染色体数目从58减少到56,可能伴随着繁殖环境从溪流到静水的变化,估计首先发生在Hynobius的星云组中。然后,在多哥小岛的陡峭山地环境中似乎仅发生了繁殖习性的逆转,从而导致了H. okiensis的形成。

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