A Comparative Study on the Karyotypes of Pond Frogs Distributed in Japan, Korea, Taiwan, Europe and North America
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概要
- 論文の詳細を見る
The karyotypes of Rana nigromaculata, Rana brevipoda, Rana plancyi chosenica, Rana plancyi fukienensis, Rana lessonae and Rana pipiens were compared with one another by examining the relative length (RL) and the numerical value of the centromere position (NVC) of each chromosome pair. The differences between two species or subspecies in these items were checked by the method of HUBBS and HUBBS (1953) as well as by t-test (MATHER, 1965). All these five species and one subspecies are 26 in diploid chromosome number and have no heteromorphic pairs of chromosomes. These 26 chromosomes are divided into two groups in size, of which one contains five pairs (Nos. 1∿5) of large chromosomes and the other contains eight pairs (Nos. 6∿13) of small chromosomes. When they are divided into four types, median, submedian, subterminal and terminal, all the species and subspecies are the same in type of seven chromosome pairs, while they are not always the same in type of the other six chromosome pairs. All the species and subspecies have a pair of small chromosomes having a secondary constriction. The karyotypes of the five species and one subspecies differ from one another with a statistical significance (P≦5%) in RL or NVC of two to all of the 13 chromosome pairs. They also differ from one another with a high statistical significance (P<0.1%) in RL or NVC of one to 10 of the 13 chromosome pairs. The total numbers of chromosome pairs which differ with a high statistical significance (P<0.1%) in either RL or NVC are six between brevipoda and nigromaculata, five between brevipoda and chosenica, nine between brevipoda and fukienensis, eight between brevipoda and lessonae, and 16 between brevipoda and pipiens; three between nigromaculata and chosenica, 12 between nigromaculata and fukienensis, eight between nigromaculata and lessonae, and 18 between nigromaculata and pipiens; eight between chosenica and fukienensis, eight between chosenica and lessonae, and 14 between chosenica and pipiens; 13 between fukienensis and lessonae, 15 between fukienensis and pipiens; and 18 between lessonae and pipiens. Similarity in karyotypes does not always reflect weakness in reproductive isolation nor shortness in genetic distance based on electrophoretic patterns of various kinds of proteins, although there is an agreement to some extent between these affairs.
- 広島大学の論文
著者
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Nishioka M
Institute For Amphibian Biology Graduate School Of Science Hiroshima University
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Nishioka Midori
Laboratory For Amphibian Biology Faculty Of Science Hiroshima University
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Nishioka Midori
Institute For Amphibian Biology Graduate School Of Science Hiroshima University
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Nishioka Midori
Graduate School Of Science Hiroshima University
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Nishioka Midori
Laboratory For Amphibian Biology Graduate School Of Science Hiroshima University
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RYUZAKI Masashi
Department of Biology, Kitasato University, School of Medicine
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OKUMOTO Hitoshi
Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University
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Okumoto H
Hiroshima Univ. Higashihiroshima Jpn
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Okumoto Hitoshi
Laboratory For Amphibian Biology Faculty Of Science Hiroshima University
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Ryuzaki Masashi
Department Of Biology And Department Of Physiology Kitasato University School Of Medicine
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