Interpopulation variation of the c banded karyotypes in rana ishikawae from okinawa jima and amami oshima in the ryukyu islands japan

Seto, T.; Utsunomiya, T.; Utsunomiya, Y.

Japanese Journal of Herpetology 10(3): 67-72


Accession: 005732504

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The C-banded karyotype of R. ishikawae, endemic to 2 Ryukyu Islands, Okinawa-jima and Amami-oshima, was analyzed. The karyotypes (2n = 26) of the Okinawa and the Amami populations were almost identical when analyzed by the conventional Giemsa stain and there was no significant difference between each corresponding chromosome pair. A minor, but significant difference was detected in the presence of a specific C-band on the long arm of no. 9 chromosomes of the Okinawa population. The Amami population consistently lacked this band. The presence of an inter-island variation of C-banded karyotypes suggests that genotypic divergence occurred during the geographic isolation in the geologic age between the populations from Amami and Okinawa.