Physical and genetic maps of the deafwaddler region on distal mouse Chr 6.
The deafwaddler (dfw) mutation, displaying motor ataxia and profound deafness, arose spontaneously in a C3H/HeJ colony and was mapped previously to distal mouse Chr 6. In this study, a high-resolution genetic map was generated by positioning 10 microsatellite markers and 5 known genes on a 968-meioses intersubspecific backcross segregating for dfw [(CAST/Ei(-)+/+ x C3HeB/ FeJ-dfw/dfw) x C3HeB/FeJ-dfw/dfw], giving the following marker order and sex-averaged distances: D6Mit64-(0.10 + 0.10 cM)-Pang-(1.24 + 0.36 cM)-Itpr1-(0.62 + 0.25 cM)-D6Mit108-(0.52 + 0.23 cM)-D6Mit54-(0.21 + 0.15 cM)-D6Mit23, D6Mit107, D6Mit328-(0.72 + 0.27 cM)-D6Mit11-(0.21 + 0.15 cM)-dfw-(0.93 + 0.31 cM)-Gat4, D6Mit55-(0.10 + 0.10 cM)-D6Mit63-(0.31 + 0.18 cM)-Syn2-(0.62 + 0.25 cM)-D6Mit44 (Rho). Female and male genetic maps are similar immediately surrounding the dfw locus, but show marked differences in other areas. A yeast artificial chromosome-based physical map suggests that the closest markers flanking the dfw locus, D6Mit11 (proximal) and Gat4, D6Mit55 (distal), are contained within 650-950 kb. The human homologues of the flanking loci Itpr1 (proximal) and Syn2 (distal) map to chromosome 3p25-p26, suggesting that the human homologue of the dfw gene is located within this same region.
McKee-Johnson
J W
JW
V. M. Bloedel Hearing Research Center, Department of Otolaryngology, University of Washington School of Medicine, Seattle 98195, USA.
Street
V A
VA
Erford
S K
SK
Robinson
L C
LC
Tempel
B L
BL
D000818:Animals; D001259:Ataxia / Q000235:genetics; D002874:Chromosome Mapping; D018244:Chromosomes, Artificial, Yeast; D003433:Crosses, Genetic; D017931:DNA Primers; D003638:Deafness / Q000235:genetics; D005260:Female; D005819:Genetic Markers; D006801:Humans; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D008818:Mice, Neurologic Mutants / Q000235:genetics*; D018895:Microsatellite Repeats; D016133:Polymerase Chain Reaction; D011995:Recombination, Genetic; D012727:Sex Characteristics
D017931:DNA Primers; D005819:Genetic Markers