THE TRD IN MALE-MICE CARRYING TRANSLOCATI ON IN COMBINATION WITH THE T-HAPLOTYPES

t-complex typical feature of the house mouse 17th chromosome is the hi gh transmission (up to 90-95%) of t-carrying chromosome to heterozygou s +/t male offspring. The influence of Rb1+/+t6, translocation Rb1 (8, 17) Iem at t-haplotype transmission TRD level of heterozygotes Rb1+/t6, Rb1+/+t12, Rb1+/+t(w5), Rb1+/+t(w18) in crossing with females of d ifferent genotypes was studied. Reliable decrease of TRD level in doub le heterozygotes of Rb1 and haplotypes t12, t(w5), t(w18) in compared with the males ++/+t was discovered. For haplotype t6 no differences i n TRD between Rb1+/+t6 and ++/+t6 were recorded. The cause of the obta ined results is discussed.