四川省新育成中籼迟熟杂交稻经济性状及产量分析研究

Correlation Analysis of Economic Character and Yield of New Mid-mature Hybrid Rice Combination (Indica) in Sichuan Province

对2006～2009年通过四川省审定的26个中籼迟熟三系杂交稻组合的经济性状和产量进行了分析,并研究了经济性状和产量间的相关关系。结果表明:26个组合的有效穗为15.21万/667m2、穗着粒为165.59粒、结实率为78.29%、千粒重为28.76g、稻谷产量为530.83 kg/667m2、增产率为5.24%。在26个组合中仅有一个组合的增产率达到超高产增产指标。在各项指标中有效穗与穗着粒数呈极显著负相关,穗着粒与千粒重呈极显著负相关,结实率与增产率呈极显著正相关。因此,在四川生态条件下,要进一步突破水稻产量水平,在保持一定的田间容穗量的基础上,应该主攻穗粒数和粒重,特别是在现有其它经济性状不变的条件下,提高结实率对提升育成品种的产量水平非常重要。

The economic character and yield of the 26 mid-mature hybrid rice combinations which had passed Sichuan province＇s approval were analyzed in 2006-2009.The results indicated： the average valid panicle was 152.1 thousands/667m2,the average No.of grains per panicle was 165.59,the average seed setting rate was 78.29 %,the average 1000-grain weight was 28.76 g,the average yield was 530.83 kg/667m2,the average stimulation ratio was 5.24 %.Among these 26 mid-mature hybrid rice combinations,only one hybrid rice combination reached the super high-yielding targets.The valid panicle and the No.of grains per panicle,the No.of grains per panicle and the 1000-grain weight were all negatively and highly significant.The seed setting rate and the stimulation ratio had very significantly positive relation.The conclusions was drawn that under ecological condition in Sichuan,it was important that the No.of grains per panicle and the grain should be improved to get high yield weight under the basis of holding a certain amount of the valid panicles.Especially under the basis of keeping the number of the other economic characters,the seed setting rate was increased and could enormously enhance the yield.