关键词: 杂交水稻, 整精米率, 遗传分析, 杂种优势, 通径系数分析

Abstract: 6×6 incomplete diallel cross was carried out for studying the inheritance of the head rice rate. The results showed that the head rice rate was mainly governed by the additive gene effects and determined by the female parents. Its broad and narrow heritabilities were 65.23% and 45.88% respectively.The correlations between the head rice rate and the brown rice rate were significantly positive, but the head rice rate and the kernal length, the head rice rate and the chalky rice percentage were significantly negative. The results of path analysis suggested that direct path coefficients from the bro brown rice rate, the kernal length and the chalky rice percentage to the head rice rate were 0.4260, -0.5967 and -0.7548, respectively. The way to develap hybrid rice combinations with desirable head rice rate is also discussed in this paper.

Key words: HYBRID RICE, HEAD RECE RATE, GEMETIC ANALYSIS, HETEROSIS, PATH COEFFICIENCY ANALYSIS