Inheritance of the Pale-Green Leaf Marker and Sterility Trait in Photo-Thermo Sensitive Genie Male S

<正> P/TGMS (photo-thermo sensitive genie male sterility) lines with pale-green leaf color have been developed in japonica rice. The marker trait is used as an assistant selection in the production of the two-lines system hybrid rice for the improvement of F, seed purity. A joint inheritance study of both leaf color and male sterility is presented for P/TGMS line with pale-green leaf color. The segregation ratios for leaf color in the F2 populations of the three crosses showed 13 : 3 and 15 : 1 at early and late sowing stages (April 26 and June 23) respectively, implying that the leaf color is controlled by two genes with fertility gene as dominant. Sterility level is higher in the early sowing stage than that in the late sowing. The inducement of male sterility is closely related to longer day-length and higher temperature at the developmental stages of young panicle. The genes to govern the leaf color and male fertility are inherited independently.