Differential intraspecific genetic variations of the closely related, wide-ranged freshwater copepods Cyclops vicinus Uljanin, 1875 and C. kikuchii Smirnov, 1932
Differential intraspecific genetic variations of the closely related, wide-ranged freshwater copepods Cyclops vicinus Uljanin, 1875 and C. kikuchii Smirnov, 1932
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密切相关的广泛淡水桡足类 Cyclops vicinus Uljanin, 1875 和 C. kikuchii Smirnov, 1932 的种内差异遗传变异
DOI：
10.1007/s10201-020-00647-7
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发表时间：
2020
期刊：
影响因子：
1.6
通讯作者：
Urabe Jotaro
中科院分区：
文献类型：
--
作者：
Sioud Imane;Makino Wataru;Urabe Jotaro
尽管有Cyclops vicinus Uljanin，1875和C. kikuchiSmirnov，1932广泛分布于欧亚大陆，欧洲和亚洲种群间的遗传差异在这两个物种中都没有被研究过。在日本，这两种同源物的命名和区别仍然是有疑问的（因此，以下简称C。vicinuss.l.）。确定了该属的分类地位。比西努斯湖通过形态学分析和核内转录间隔区1（ITS-1）和线粒体12 S（mt 12 S）基因测序。ITS-1同源性将JapaneseC.比西努斯湖分为两个遗传组;一个与欧洲C. kikuchii（因此，CkikJPN），而另一个与EuropeanC. vicinus（因此，CvicJPN）。利用末端分叉刚毛长度的形态学分析表明，CkikJPN和CvicJPN对应于C。kikuchiian和C. vicinus，分别。结果表明，C. vicinusandC.日本的菊地虫与欧洲的菊地虫是同一物种。日本居群与欧洲居群之间mt 12 S的分化程度在种间差异很大，在C. kikuchii，而C. vicinus;这是第一个在欧洲和亚洲种群之间的遗传差异在淡水桡足类的密切相关物种之间存在很大差异的案例。
AlthoughCyclops vicinusUljanin, 1875 andC. kikuchiiSmirnov, 1932 are broadly distributed in Eurasia, the genetic divergences between European and Asian populations have been investigated in neither species. In Japan, the nomenclature and distinction between these two congeners are still questionable (thus, hereafterC. vicinuss.l.). We determined the taxonomic position of the JapaneseC. vicinuss.l. by morphological analyses and by sequencing nuclear internal transcribed spacer 1(ITS-1) and the mitochondrial 12S (mt12S) genes. The ITS-1 phylogeny separated JapaneseC. vicinuss.l. into two genetic groups; one was clustered with EuropeanC. kikuchii(thus, CkikJPN), while the other was clustered with EuropeanC. vicinus(thus, CvicJPN). Morphological analyses using the lengths of terminal furcal setae revealed that CkikJPN and CvicJPN correspond toC. kikuchiiandC. vicinus, respectively. These results revealed thatC. vicinusandC. kikuchiiin Japan are confidently the same species as those in Europe. The degree of divergence in the mt12S between Japanese and European populations varied largely between the species, as it was nearly at the interspecific level inC. kikuchii, while it was at the intraspecific level inC. vicinus; it is the first case in which the genetic divergence between the European and Asian population is greatly different among closely related species of freshwater copepods.
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