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首页> 外文期刊>Zoological Science >Molecular Evidence of the Existence of Two Sibling Species within the Echinothurioid Echinoid Asthenosoma ijimai from Japanese Waters
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Molecular Evidence of the Existence of Two Sibling Species within the Echinothurioid Echinoid Asthenosoma ijimai from Japanese Waters

机译：来自日本水域的棘皮动物类棘皮动物眼线虫存在的两个兄弟物种的分子证据

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摘要

The echinoid, Asthenosoma ijimai belonging to the order Echinothurioida from Japanese waters shows the geographical variation in morphological and ecological characters. The echinothurioid from Ryukyu Islands in southern Japan is cleary different from that of Sagami Bay and Suruga Bay in the middle part of Japan at non-molecular level.Their phylogenetic and taxonomic relationships were studied at the molecular level by allozyme analysis. The results demonstrated that the two echinothurioids from Ryukyu Islands and Sagami Bay do not share gene pools with each other, and they were fixed for different alleles at five genetic loci (Mdh, G6pd, Po, Alk-3 and Est-7) in a total of 23 enzyme genetic loci scored. This indicates no gene flow between the two echinothurioids, and is a molecular evidence for that they are reproductively isolated and genetically distinct species. The Nei's genetic distance (D=0.181) between the two were significantly higher than those between conspecific local populations, and comparable to those between closely related species in many other animals containing echinoderms. The present molecular data are well consistent with the non-molecular evidence from morphology, developmental biology and ecology. Putting these data together, we propose that the two echinothurioids should be classified as two sibling species of the genus Asthenosoma and would like to give the following scientific names: the echinothurioid species from Sagami Bay is Asthenosoma ijimai and that from Ryukyu Islands is A. ijimai R.
机译：属于日本海E纲E纲的e突目象鼻虫（Asthenosoma ijimai）表现出形态和生态特征的地理变异。来自日本南部琉球群岛的棘皮类动物在非分子水平上与日本中部的相模湾和骏河湾明显不同，通过同工酶分析在分子水平上研究了它们的系统发育和分类学关系。结果表明，来自琉球群岛和相模湾的两种棘突类动物不共享基因库，它们分别固定在五个遗传位点（Mdh，G6pd，Po，Alk-3和Est-7）的不同等位基因上。共有23个酶遗传基因座得分。这表明两种棘突类动物之间没有基因流动，并且是分子证据证明它们是生殖分离的和遗传上不同的物种。两者之间的Nei遗传距离（D = 0.181）显着高于同种本地种群之间的遗传距离，与许多其他包含棘皮动物的近亲物种之间的遗传距离相当。目前的分子数据与来自形态学，发育生物学和生态学的非分子证据非常吻合。将这些数据放在一起，我们建议将这两种棘皮类动物归类为哮喘样动物的两个兄弟种，并要给出以下科学名称：相模湾的类棘皮动物物种为Ijimai的Asthenosoma，而琉球群岛的类棘皮动物为A. ijimai。 R.

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