| 1 Fertility, outcrossing habits of 7 indica cytoplasmic male sterile(CMS) lines(D62A. D63A. D64A, D23A, G46A. Jin23A, Zhenshan97A) and the correlation and path analysis of 6 characters related to outcrossing seed-setting rate were studied. The main results showed:(1) Fertility. The seed-setting rate of self-pollination of 7 CMS lines in Wenjiang and Lingshui were zero. Pollen fertility identified by I2-KI showed the degree of pollen sterility of 7 CMS lines were 100% in Wenjiang.(2) The habits of panicle drawing and flowering. The panicle drawing of 6 CMS lines were faster than CK(Zhenshan97A) except for G46A, D64A was the fastest. As the single panicle flowering duration was concerned, Zhenshan97A was longest, D64A was shortest, but G46A was longest for a single plant in flowering duration, D64A was shortest, too. D63A, G46A, Zhenshan97A and Jin23A had a obvious high flowering time, G46A was especially, the rate of its spikelets flowering in this time was 26.58% in a day. D62A, DMA and D23A had not high flowering time. In percentage of spikelets flowering before noon, D63A was highest(58.93%), secondly was D23A, G46A, Zhenshan97A and Jin23A were lower. The spikelet flowering rate of D62A, D63A, D64A and D23A were higher than Zhenshan97A. The spikelet indehiscent rate of Jin23A and G46A were higher than others. The dead spikelet rate of G46A was the highest.(3) Spikelet traits. Spikelet opening time of Zhenshan97A(4.18h) was longest. The order of other 6 CMS lines in the sequence of decending was G46A. D62A, D63A, D64A D23A, JIN23A. The order of distance of opened spikelet tips in the sequence of decending was D62A, D63A, D64A, JIN23A, D23A Zhenshan97A G46A. Two of them, Zhenshan97A and G46A, their distance of opened spikelet tips were shorter than that of restorer lines (Shuhui368 and Minghui63), but the difference was non-obvious. Opening angle of spikelet of 7 CMS lines were lower than restorer lines, but they all beyond 28.(4) Stigma exserted rate and stigma vigour. The order of stigma exserted rate of 7 CMS lines in the sequence of decending was D62A, Jin23A, D23A, D63A, Zhenshan97A, D64A and G46A. Single stigma exserted rate was higher than double stigma exserted rate in themselves. In the first day of flowering, the stigma vigour of 7 CMS lines were the most strongest, their seed-setting by pollinated were over 80%. From then on, the stigma vigour descended quickly. The coefficient of stigma vigour of D62A, D63A, D64A, D23A, G46A, Jin23A, Zhenshan97A in order was 1.78, 1.63, 1.91, 1.68, 1.70, 1.58, 1.65.(5) The order of outcrossing seed-setting rate of 7 CMS lines in the sequence of decending was: D62A, D63A, D23A, Jin23A, D64A, G46A, Zhenshan97A.(6) Economic traits. In the situation of non-application of "920", unemerged spikelet rate of 7 CMS lines were 100%. The unemerged panicle rate of 7 CMS lines were high innon-application of "920" and the unemerged panicle rate of D62A D63A, D64A. D23A, G46A. Jin23A, Zhenshan97A in order was 9.17%. 18.08%. 12.39%. 17.55%, 15.82% 18.47%. 19.39%. In the number of flowering spikelet, Zhenshan97A was most, in the sequence of decending of others was D62 A. G46A. D64A. Jin23A. D23A. D63A.(7) The correlation and path analysis of 6 characters related to outcrossing seed-setting showed that stigma exserted rate and opening angle were extremely significant positive correlation to outcrossing seed-setting rate, their correlation coefficient was 0.963 and 0.936 respectively. The correlation of outcrossing seed-setting rate and other traits had no significant. The direct effect of stigma exserted rate to outcrossing seed-setting rate was the biggest, the path coefficient was 0.8383. The path coefficient of spikelet opening time to outcrossing seed-setting rate was 0.4132, but its indirect effect through other characters was negative on the whole. As a result, the correlation of spikelet opening time to outcrossing seed-setting rate was negative. The direct effect of opening angle of spikelet and spikelets flowering before noon to outcrossing seed-sett...
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