C-heterochromatin pattern of ten species of tetrigids (Tetrigidae, Orthoptera)
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The karyotypes of species belonging to the Tetrigidae is characterised by structural conservatism. The standard chromosome set of T. japonica, T simulans, T. bolivari, P. meridionalis, U. depressus, and F. robustus consists of 2n=13 acrocentric chromosomes in males and 2n=14 in females, with a sex determining mechanism of X0 male and XX female. C-bands distribution of ten species belonging to 4 genera were studied. Differences in the position of C-bands and number of chiasma between species are discussed.
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E. Warchalowska-Sliwa, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, 31-016 Krakow, Poland