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Bearing of Chromosome C-banding patterns on the Classification of Eurasian Toads of the Bufo bufo Complex

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image of Amphibia-Reptilia

Distribution of NORs and C-spots in the karyotypes was compared among six forms of the Bufo bufo complex, i.e. B. j. japonicus, B. j. formosus, B. torrenticola and B. gargarizans miyakonis from Japan, and B. b. bufo and B. b. verrucosissimus from USSR. All forms invariably possessed NORs on 6q. All the 11 pairs of homologous chromosomes had constitutive heterochromatin on the centromere region in every form of toad examined. Further, each form had pericentric heterochromatin on 1p and telomeric one on 6q. Pairs 8 and 9 lacked C-bands except the centromeric spot in every form. Other chromosomes revealed unique C-spots specific to each form, and each form could be characterized from others by the banding pattern. Comparisons of the C-banding patterns of the three forms obtained with those of the published data revealed several discrepancies, but most of them were attributed to the unlike standard in recognizing spots by the different authors. Although the C-banding pattern is suggested to have some taxonomic value, systematic relationships among the six forms cannot be directly estimated by the analyses of banding patterns.

Affiliations: 1: Biological Laboratory, Yoshida College, Kyoto University, Sakyo, Kyoto 606 Japan; 2: Department of Biology, Faculty of Education, Shimane University, Matsue 690 Japan; 3: Department of Herpetology, Zoological Institute, Academy of Sciences, Leningrad 199 034 USSR

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/content/journals/10.1163/156853885x00155
1985-01-01
2016-12-03

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