Abstract:

In order to study the effect of the gametocidal chromosome, crosses were made between wheat-rye sustitution lines H-13(1R/1D), H-24(5R/5A), H-33(6R/6A) and Chinese spring - gametocidal chromosome disomic addition lines, CS-DA2C(derived from Ae.cylindrica), CS-DA3C(derived from Ae. triuncialis).The results showed that the chromosome 3C has completed gametocidal action in H-13 and H-24, but its gametocidal action in H-33 is uncompleted, it has almost normal rate of seed set. This result indicate that the different genetic background of wheat-rye sustitution lines has great effect for the gametocidal action, possibly the H-33 line has the suppressor gene to the gametocidal action of 3C chromosome. When the H-33 line as female parent, the obvious difference of the rate of selfcossed seed set of F1 is showed between two gametocidal addition lines, indicating that the gametocidal action of 2C and 3C is different in the same background of wheat-rye alien sustitution lines, possibly the two gametocidal chromosomes carry different gametocidal genes.These results provide a good basis for further developing wheat-rye translocation lines.