Ribosomal DNA in a supernumerary chromosome segment of the grasshopper Oedipoda fuscocincta confirms its origin by translocation

Abstract

Fluorescence in situ hybridization has revealed that the supernumerary chromosome segment (SCS) distaiiy located on the S10 chromosome of the grasshopper Oedipoda fuscocincta is partly composed of ribosomal DNA. Since the only rDNA cluster in the standard genome is located on the M9 chromosome, the present finding lends a clear support for the hypothesis that this SCS arose from translocation of the proximal M9 region containing the rDNA to the distal region of the S10 chromosome.