光敏感雄性不育性状由强感光型向弱感光型粳稻的转育研究

强感光型的光敏感雄性不育（Pms）水稻农垦58s与早熟粳稻杂交，F#-2群体有约0.09%的植株表现完全败育和Pms。这些植株的F#-4家系雄性败育水平依然分离，其中仅一个株系表现雄性不育彻底。继之对其感光性进行选择后，笔者选育出C407s。它兼有穗分化对光周期不敏感及雄性育性对光周期敏感的双重特点。研究结果表明，Pms性状向弱感光性粳稻的转育是可行的。

THE TRANSFER OF Pms IN JAPONICA RICE VARIETIES FROM STRONGLY SENSITIVE TYPE OF FLOWERING RESPONSE TO PHOTOPERIOD INTO THE WEAKLY SENSITIVE TYPE OF RICE

Having crossed with the counterpart of Pms (i.e. photoperiodic sensitive genic male sterile ) rice, Nongken 58s with strongly sensitivity of flowering response to photoperiod, and several early maturing cultivars of japonica varieties, only about 0.09% of plants have shown full Pmst that were selected from the F_2 population. Although all F_4 familial lines of these Pms plants or most of their plant lines were continuously segregated at different sterile levels, yet there was single plant line having exhibited uniform with fully sterility among the plants. Afterwards observing and selecting on the sensitivity of flowering response, in the final issue, we have bred C407s with both weakly sensitive character of flowering response and strongly sensitive behaviour of male fertility to photoperiod.The results reveal that the expression or extent of Pmst is possible or feasible in the japonica rice which possesses weak sensitivity of flowering response to photoperiods.