Linear relationship of the loci for barring, dermal melanin inhibitor, and recessive white skin on the chicken Z chromosome.
The Z-linked loci barring (B), dermal melanin inhibitor (Id), and recessive white skin (y), and the MN t(Z;1) Z-linked chromosome translocation breakpoint (TB) were tested for linkage relationships. The linear order was found to be B-Id-TB-y, with B distal from the centromere on the long arm of the chromosome, and y mapping closest to the centromere. Calculated map unit values between markers varied depending on the presence or absence of the chromosome translocation. When tested on a normal chromosome, map distance +/- SE between B and Id was 13.7 +/- 2.2, and the Id-y distance was 39.9 +/- 3.0. The B and y loci showed independent segregation. When B and y were tested in the presence of the translocation, the calculated distance between these markers was 29.8 +/- 4.0. The B locus mapped 19.1 +/- 3.5 from TB, and y mapped 16.8 +/- 3.1 from TB.
Bitgood
J J
JJ
Department of Poultry Science, University of Wisconsin-Madison 53706.
D000818:Animals; D002645:Chickens / Q000235:genetics*; D002874:Chromosome Mapping; D008040:Genetic Linkage; D005819:Genetic Markers; D010641:Phenotype; D012730:Sex Chromosomes; D014178:Translocation, Genetic
D005819:Genetic Markers