Tardy feathering locus (t) located on chromosome 1 in the chicken.

The locus for tardy feathering (t), a recessive autosomal rate of feathering mutation, had been previously suggested to be on chromosome 1 in the chicken. Tests using both pea comb (P) and the breakpoint (B) of a chromosome translocation involving chromosome 1 (MN t(Z;l] verify that t lies on the long arm of chromosome 1, and shows linkage of 41.7 +/- 2.2 map units, with P located on the short arm.