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Karyotypic featurets of Eyprepocnemidini grasshoppers from Russia and Central Asia with reference to the B chromosomes in Eyprepocnemis plorans (Charp.)

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Bugrov A., Warchalowska-Sliwa E., Vysotskaya L.

Folia Biologica

1999

vol. 47

issue 3-4

97-104

Karyotypes and C-banding patterns of grasshoppers, members of the subfamily Eypre- pocnemidinae Thisoicetrinus pterostichus (F.-W.), Heteracris adspersa (Redt.), Eypre- pocnemis unicolor Tarb., Eyprepocnemis plorans (Charp.), and Shirakiacris shirakii (I. Bol.) are described. Chromosome complements of these species are composed of 23 acro- centric chromosomes in the male. The sex-determining mechanism is X0_/XX_. The B chromosomes were observed in the Northern Caucasus population of E. plorans. There was no evidence for any significant effect of 2Bs on either mean chiasma frequency or between cell-variance. There was a significant increase in the mean chiasma frequency for specimens with 1B.

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1 Folia Biologica

1 1999

1 Bugrov A.

1 Vysotskaya L.

1 Warchalowska-Sliwa E.

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Karyotypic featurets of Eyprepocnemidini grasshoppers from Russia and Central Asia with reference to the B chromosomes in Eyprepocnemis plorans (Charp.)