Chromosome analysis and mapping of ribosomal genes by one- and two-color fluorescent in situ hybridization in Hinnites distortus (Bivalvia: Pectinidae)

An analysis of metaphase chromosomes of the scallop Hinnites distortus using Giemsa staining, chromosome measurements, silver staining, one- and two-color fluorescent in situ hybridization (FISH) ribosomal DNA (rDNA) probes and 4', 6-diamidino-2-phenylindole (DAPI) banding compatible with in situ hybridization is presented. The 5S rDNA show a conventional tandem arrangement with a repeat unit of about 450 bp and it maps at the pericentromeric region of the long arm of one subtelocentric pair.