Karyotypes of Brown Frogs Distributed in Japan, Korea, Europe and North America

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概要

• 論文の詳細を見る

• The karyotypes of five Japanese brown frog species, Rana japonica, Rana ornativentris, Rana tsushimensis, Rana dybowskii and Rana chensinensis, two Korean brown frog species, Rana amurensis coreana and Rana dybowskii, one European brown frog species, Rana temporaria and one North American brown frog species, Rana sylvatica, were compared with one another by examining the relative length (RL) and numerical value of the centromere position (NVC) of each chromosome pair. The differences between two species or local races in these items were checked by the method of HUBBS and HUBBS (1953) as well as by t-test (MATHER, 1965). Rana japonica, Rana tsushimensis, Rana amurensis coreana, Rana temporaria and Rana sylvatica have 2n=26 chromosomes, while Rana ornativentris, Rana dybowskii and Rana chensinensis have 2n=24 chromosomes. The 26 or 24 chromosomes are divided into two groups in size; one contains five (Nos. 1∿5) pairs of large chromosomes and the other contains eight (Nos. 6∿13) or seven (Nos. 6∿12) pairs of small chromosomes. Chromosome No. 9 of the species with 26 chromosomes and chromosome No. 10 of the species with 24 chromosomes have a secondary constriction in the long arm, except that No. 9 of Rana sylvatica has an additional secondary constriction in the short arm. The karyotypes of the five species with 26 chromosomes differ from one another with a statistical significance (P≦5%) in either RL or NVC of seven to all of the 13 chromosome pairs. The karyotypes of the three species with 24 chromosomes differ from one another with a statistical significance (P≦5%) in either RL or NVC of seven to all of the 12 chromosome pairs. The karyotypes of the species having 26 chromosomes were compared with those of the species having 24 chromosomes in RL and NVC by neglecting chromosomes Nos. 11,12 and 13 of the former species and chromosomes Nos.6 and 12 of the latter species, as these chromosomes are difficult to compare in size and shape. It was found that the karyotypes of the five species with 26 chromosomes differ with a statistical significance (P≦5%) from those of the three species with 24 chromosomes in either RL or NVC of five to all of the 10 chromosome pairs. The differences in karyotype among the eight brown frog species are not always correlated with the genetic distances and the reproductive isolation among them.

• 広島大学の論文

著者

• Nishioka M

  Institute For Amphibian Biology Graduate School Of Science Hiroshima University

• Nishioka Midori

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

• Nishioka Midori

  Institute For Amphibian Biology Graduate School Of Science Hiroshima University

• Nishioka Midori

  Graduate School Of Science Hiroshima University

• UEDA Hiroaki

  Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University

• Ueda Hiroaki

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

• Nishioka Midori

  Laboratory For Amphibian Biology Graduate School Of Science Hiroshima University

• RYUZAKI Masashi

  Department of Biology, Kitasato University, School of Medicine

• OKUMOTO Hitoshi

  Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University

• Okumoto H

  Hiroshima Univ. Higashihiroshima Jpn

• Okumoto Hitoshi

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

• Ryuzaki Masashi

  Department Of Biology And Department Of Physiology Kitasato University School Of Medicine

• Ueda Hiroaki

  Laboratories Of Image Information Science And Technology

• Ueda Hiroaki

  Laboratories of Image Information Science and Technelogy, Osaka City University

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