关键词: 雄性不育细胞质, 雄性不育系, 杂交稻, 变劣效应

Abstract: Three indica sterile lines, K qingA, with high combination ability, K19A, with mid-resistibility to rice blast, and K17A, with high yield of propagation and seed production, have been bred successively by using sterlie giants fron progeny of hybrid between japonica and indica as CMS donor. Subseqently, a series of new hybrid rice combinations with different growth duration have been selected out. Up to date, two combinations were released, two more finished district test, and five more are taking part in district test and productional test. Elementary research showed that the CMS has least negative effect on yield traits of ealy-season hybrid rice, apparently different from those which have been used in rice production. Finally, the valuation of the CMS was discussed.

Key words: MALE STERILE CYTOFLASM, MALE STERILITY LINES, HYBRID RICE, NEGATIVE EFFECT