Multiregional origin of B chromosomes in the grasshopper Eyprepocnemis plorans

• Published in: Chromosoma Vol. 112; no. 4; pp. 207 - 211
• Main Authors: Cabrero, J, Bakkali, M, Bugrov, A, Warchalowska-Sliwa, E, López-León, M D, Perfectti, F, Camacho, J P M
• Format: Journal Article
• Language: English
• Published: Austria Springer Nature B.V 01-12-2003
• Subjects: Acrididae; Animals; B chromosome; Chromosome Mapping; Chromosomes; Chromosomes - genetics; DNA Primers; DNA, Ribosomal - genetics; DNA, Satellite - genetics; Evolution, Molecular; Eyprepocnemis plorans; Genetics; Geography; Grasshoppers - genetics; In Situ Hybridization, Fluorescence; Male; rRNA 5S; Russia; Sequence Analysis, DNA; Spain; Species Specificity; Russia; Spain; Europe
• ISSN: 0009-5915; 1432-0886
• DOI: 10.1007/s00412-003-0264-2

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.