Multiregional origin of B chromosomes in the grasshopper Eyprepocnemis plorans.
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.
Cabrero
J
J
Departamento de Genética, Universidad de Granada, 18071 Granada, Spain.
Bakkali
M
M
Bugrov
A
A
Warchalowska-Sliwa
E
E
López-León
M D
MD
Perfectti
F
F
Camacho
J P M
JP
D000818:Animals; D002874:Chromosome Mapping; D002875:Chromosomes / Q000235:genetics*; D017931:DNA Primers; D004275:DNA, Ribosomal / Q000235:genetics; D004276:DNA, Satellite / Q000235:genetics; D019143:Evolution, Molecular; D005843:Geography; D006110:Grasshoppers / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D012426:Russia; D017422:Sequence Analysis, DNA; D013030:Spain; D013045:Species Specificity
D017931:DNA Primers; D004275:DNA, Ribosomal; D004276:DNA, Satellite