Faculty Research 1990 - 1999
Genetic mapping of 18S ribosomal RNA-related loci to mouse chromosomes 5, 6, 9, 12, 17, 18, 19, and X.
Document Type
Article
Publication Date
1996
Keywords
Chromosome-Mapping, DNA-Ribosomal, Female, Male, Mice, Mice-Inbred-C57BL, RNA-Ribosomal-18S, SUPPORT-U-S-GOVT-P-H-S, X-Chromosome
First Page
886
Last Page
889
JAX Source
Mamm Genome 1996 Dec;7(12):886-9
Abstract
The organization of ribosomal RNA genes (rDNA) in the genome of the mouse varies significantly from one strain to another, but has been shown to follow the pattern of clusters of tandem repeats located at chromosome ends, often associated with cytological nucleolus organizer regions. The number of copies of the repeat unit at each locus also varies. A probe for the 18S ribosomal RNA sequence on Southern blots reveals both high copy number bands and fainter bands indicative of low repeat number. We have mapped a number of newly identified low-copy-number rDNA loci in C57BL/6J, in addition to placing some of the NOR-associated rDNA repeats on the Jackson interspecific backcross (BSS) map. We suggest that additional low-copy-number loci may remain to be mapped, and that the evolution of rDNA loci in the genome may include the proliferation of single copies by retroinsertion or other mechanisms.
Recommended Citation
Rowe LB,
Janaswami PM,
Barter ME,
Birkenmeier EH.
Genetic mapping of 18S ribosomal RNA-related loci to mouse chromosomes 5, 6, 9, 12, 17, 18, 19, and X. Mamm Genome 1996 Dec;7(12):886-9