Studies About The Relationships Between The Evenness Degree And Yield Characters Of Hybrid Early Rice

Relationships among the yield among yield yield component factors and characters and among them and evenness degree of every character were studied with 32 medimru late-maturing hybrid rice. The results were as follows.1 The results of the multiple comparisons of yield showed that the grain yield per plant of F1-l22, F1-147 and F1-120 was the higher, and their indexes of every character were the average and superior level, and they had more characters of good evenness degree, So they owned a good application perspective and were worth of being further studied.2 Filled grain per paxicle,1000-grain weight, plant height, and panicle number per plant had significant effect on yields Panicle Length was highly significantly positive correlations with filled grain number per panicle, total grain number per panicle, 1000-grain weight and plant height?And it was highly significantly positive correlation between filled grain number per panicle and total grain number per panicle, seed setting rate and plant height, and between total grain number per panicle and plant height?3 These combinations, suchasF1-11 F1-45 F1-86 F1-88 F1-122 F1-147and Fi-120, had morn characters of good evenness degree, and further higher grain yield per plant, but other combinations; such as F1-17 F1-27 F1-36 and F1-107, had less characters of good evenness degree and relatively lower grain yield per plant4 The correlation of evenness degree of plant height and grain yield per plant was significantly positive, and the correlation of evenness degree of panicle length and grain yield per plant was approximately significantly positive, but evennessdegree of other characters had no significant effect on the grain yield per plant5 The correlation of evenness degree of every character and the yield component factor was not significant, except that evenness degree of panicle number per plant was significantly negative correlation with seed setting rate6 Among yield component factors and evenness degree of every character, the one which contributed the most to the grain yield per plant in filled grain number per panicle then 1000-grain weights seed setting rate evenness degree of plant height, panicle number per plant and evenness degree of panicle length...