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.
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This study was supported by grants from the Spanish Ministerio de Ciencia y Tecnología (BOS2000-1521) and Plan Andaluz de Investigación, Grupo no. CVI-165.
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Communicated by E.R. Schmidt
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Cabrero, J., Bakkali, M., Bugrov, A. et al. Multiregional origin of B chromosomes in the grasshopper Eyprepocnemis plorans . Chromosoma 112, 207–211 (2003). https://doi.org/10.1007/s00412-003-0264-2
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DOI: https://doi.org/10.1007/s00412-003-0264-2