Lack of recombination between the Z-linked silver feather pattern locus and the break point of a chromosome translocation: a second occurrence.

A mating was conducted to test the linkage relationship between the Z-linked silver locus (S) and the NM 7659 t(Z;1) chromosome translocation. No recombinants between the break point and S were recovered (n = 187). A previous study had shown no recombination between the S locus and the MN t(Z;3) chromosome translocation. The proximity of these two break points and the endogenous retrovirus ev21 may indicate an unstable DNA segment in this region.