Abstract
We present data on the effects of three chromosome 17 deletions on transmission ratio distortion (TRD) and sterility of several t-haplotypes. All three deletions have similar effects on male TRD: that is, Tdel/tcomplete genotypes all transmit their t-haplotype in very high proportion. However, each deletion has different effects on sterility of heterozygous males, with TOr/t being fertile, Thp/t less fertile, and TOrl/t still less fertile. These data suggest that wild-type genes on chromosomes homologous to t-haplotypes can be important regulators of both TRD and fertility in males, and that the wild-type genes concerned with TRD and fertility are at least to some extent different. The data also provide a rough map of the positions of these genes.
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