Preliminary Genetic Study on the Variation of Fertility Expression of TGMS Gene in Different Genetic Backgrounds

In this experiment, 903365, with low sterility inducing temperature (SIT), 90332S and Annong S1, with medium SIT, 90341S, with high SIT were selected as parents for researching the genetics of variation of fertility expression of TGMS gene in different genetic backgrounds. The fertility expression of F2s and B1s was observed under natural conditions. It was found that the SIT difference between 90336S and 90332S is controlled by two independent dominant genes (L1,L2) and the SIT difference between Annong S-1 and 90341S is controlled by a incomplete dominant gene H. L1,L2 can decrease SIT, but H increase it.