水稻籼粳亚种间杂种优势的利用途径

THE WAYS OF UTILIZING THE INDICA-JAPONICA INTERSUBSPECIFIC HETEROSIS OF RICE

In the present paper,some ways of directly or indirectly utilizing indica-japonica intersubspecific heterosis of rice,arediscussed.The ways are as follows:A:Indirectly utilizing the indica-japonica intersubspecific heterosis by cultivating new varieties (lines) through indica-japonica hybridization.B:Directly utilizing the indica-japonica intersubspecific heterosis through:a:three-line methodb:chemical emasculation methodc:Photo-(or thermo-) Sensitive Genic Male sterile Rice two-line methodd:apomictic breeding methode:making artificial F_0 seeds of indica/japonica combinationsAnd all of these ways' present situations and developing prospects are also discribed.