Studies On The Relationship Between F₁ Evenness Degree And The Yield, And Yield Characters Of Late Hybrid Rice

Reltionships among the yield, among yield, yield component factors and characters and among them and evenness degree of every character were studied with 38 late hybrid rice(Fi). The main results were as follows:1. The results of the real grain yield per plant showed that F1-5, F1-6, F1-7, F1-12,F1-19, F1-31, F1-89, F1-91and F1-97 were over 30g. And their yield was significantly higher than V46(21.8g), F,-31 (38.43g) was the highest.2. The research result on the relationship of evenness degree of every character and the yield, we found: The correlation of evenness degree character and the yield of plant height , plant length panicle number, total grain number per plant and filled grain number per paxide was not significant, but the correlation of evenness degree of plant weight and yield was approxcmately significant. We found: through path analysis, The evenness degree of plant height and the evenness degree of panicle length had significant effect on yield. The factor of the evenness degree of plan height was positice effect, The factor of evenness degree was negative effect.3. The correlation of evenness degree of plant height weight was significantly positive. The correlation of evenness degree and panicle number per plant was significately positivet weakly. The correlation of total number per panicle and filled grain was no significate nagative. The correlatiun of evenness degree of panicle length and yield component was no significant.4. Among yield component factor and the evenness degree of every character paniclelength, the one which contributed the most to the yield in filled grain number per panide, then 1000-grain weight. Panicle number evenness degree of plant length and evenness degree of panicle length.