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综合冀东水稻四个推广时期21个代表品种农艺性状的演变趋势,用灰色关联度分析法对性状间变化态势的异同及相互影响程度的分析表明:单株产量、全生育期、穗粒数和千粒重大幅度增加;株高和穗长趋向增加;单株穗数和结实率变化不大。关联度分析结果与各性状演变的趋势基本一致。指出今后冀东水稻产量育种应在增加穗粒数的基础上主攻千粒重。
Based on the trend of agronomic traits of 21 representative cultivars during the four popularization stages of Jidong Rice, the analysis of the similarities and differences and the mutual influence between the traits by gray relational analysis showed that: the yield per plant, the whole growth period, the number of grains per spike And 1000 grain weight increased significantly; plant height and spike length tended to increase; the number of panicle per plant and seed setting rate changed little. The result of correlation analysis basically agrees with the trend of evolution of each trait. It is pointed out that in the future, the yield and breeding of rice in Jidong should focus on the 1000-grain weight on the basis of increasing the number of grains per ear.