1. Multiregional origin of B chromosomes in the grasshopper Eyprepocnemis plorans.
- Author
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Cabrero J, Bakkali M, Bugrov A, Warchalowska-Sliwa E, López-León MD, Perfectti F, and Camacho JP
- Subjects
- Animals, DNA Primers, DNA, Ribosomal genetics, DNA, Satellite genetics, Geography, In Situ Hybridization, Fluorescence, Male, Russia, Sequence Analysis, DNA, Spain, Species Specificity, Chromosome Mapping, Chromosomes genetics, Evolution, Molecular, Grasshoppers genetics
- Abstract
Analysis of chromosome localization of three molecular markers, 18S-5.8S-28S rDNA, 5S rDNA and a 180 bp satDNA, showed that B chromosomes in the grasshopper Eyprepocnemis plorans originated independently in Eastern (Caucasus) and Western (Spain and Morocco) populations. Eastern B chromosomes are most likely derived from the smallest autosome, which is the only A chromosome carrying the three markers, in coincidence with Caucasian B chromosomes. Western B chromosomes, however, lack 5S rDNA and are most likely derived from the X chromosome, which is the only A chromosome carrying the two remaining markers, always in the same order with respect to the centromere, as the B chromosome.
- Published
- 2003
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