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Interpopulation sex-chromosomes polymorphism in the grasshopper Podisma sapporensis Shir. from Sakhalin and the Kurile Islands

100%

Bugrov A. G.

Folia Biologica

1995

vol. 43

issue 1-2

51-53

A comparative karyotype analysis of two populations of Podisma sapporensis showed that :2n male=22 + XO and 2n female = 22 + XX, the X chromosomes are subacrocentric as a result of the inversion within a population derived from Sakhalin; 2n male=20 + neo-X+neo-Y and 2nfemale=20 + neo-XX, as a ersult of X autosome translocation in population from the Kurile Islands (Kunashir).

B chromosomes, translocation between B and autosomes, and C-heterochromatin polymorphism of the grasshopper Podisma sapporensis Shir. (Orthoptera, Acrididae) in Hokkaido, northern Japan

63%

Warchalowska-Sliwa E., Bugrov A., Tatsuta H., Akimoto S.

Seven categories of B chromosomes found in the brachypterus grasshopper Podisma sapporensis from Hokkaido populations differ in structure, size, and C-band content. The interchange between B and one autosome from M3 and sporadically M7 was observed in most of the populations examined. Such an interaction between standard and non-standard chromosomal set provides an insight into the integration of supernumerary chromosome. In addition, C-heterochromatin polymorphism was also identified in male karyotypes in some populations. These facts indicate P. sapporensis is a highly polymorphic species from the cytogenetic point of view.

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2 Folia Biologica

1 2001

1 1995

1 Akimoto S.

1 Bugrov A.

1 Bugrov A. G.

1 Tatsuta H.

1 Warchalowska-Sliwa E.

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Interpopulation sex-chromosomes polymorphism in the grasshopper Podisma sapporensis Shir. from Sakhalin and the Kurile Islands

B chromosomes, translocation between B and autosomes, and C-heterochromatin polymorphism of the grasshopper Podisma sapporensis Shir. (Orthoptera, Acrididae) in Hokkaido, northern Japan