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对“十二五”期间四川省审定的51个高产型中籼迟熟三系杂交稻组合的经济性状和产量进行了分析,并研究了经济性状与产量间的相关关系。结果表明,这51个组合的平均有效穗数为13.89万/667 m~2、穗着粒数为176.87粒、结实率为80.99%、千粒重为29.52 g、稻谷产量为547.22 kg/667 m~2、增产率为5.36%。单产与有效穗数和增产率呈极显著正相关,与穗长、穗着粒、结实率和千粒重相关性均不显著;有效穗数与穗着粒数、千粒重呈极显著负相关,与穗长呈显著负相关;结实率与千粒重呈显著负相关。因此,在四川省这样的生态条件下,要进一步突破水稻产量水平,应在保持一定单穗质量的基础上,平衡协调穗、粒结构,适当增加有效穗数。针对不少品种结实率不高的问题,提出了提高新育杂交稻结实率的主要途径。
The economic traits and yield of 51 high yield mid-season indica late maturing three-line hybrid rice combinations approved in Sichuan during the “12th Five-Year Plan” period were analyzed and the correlation between economic traits and yield was studied. The results showed that the average effective panicle number of the 51 combinations was 138,900 / 667 m ~ 2, the number of panicle was 176.87, the seed setting rate was 80.99%, the grain weight was 29.52 g, the yield of paddy was 547.22 kg / 667 m ~ 2 , Yield increase rate of 5.36%. There was a significant positive correlation between yield per panicle and yield, and no significant correlation with yield, spike length, grain weight per plant, seed setting rate and 1000-grain weight. There was a significant negative correlation between effective panicle number and spike grain weight and 1000-grain weight. Length was significantly negative correlation; seed setting rate and 1000-grain weight was significantly negatively correlated. Therefore, under the ecological conditions such as Sichuan Province, to further break through the rice production level, we should balance the spike and grain structure and increase the effective panicle number on the basis of maintaining a certain single ear quality. Aiming at the problem that the seed setting rate of many varieties is not high, the main ways to improve the seed setting rate of Xinyu hybrid rice were put forward.