【摘要】 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。更多还原

【Abstract】 Through summarizing the evolution tendency of 21 rice varieties developed in 4 different periods, the development tenedncy of the agronomic traits were studyed by means of correlative analysis. Result showed that plant weight, growth period, the number of kernel perspike, and thousand kernels weight were increased, plant height and spike length have a tendency of increase, while the number of spike per plant and fertility rate stay unchanged. The result of correlative analysis is basically in accordance with the traits evolution tendency. It is suggested that the rice breeding program in East Hebei should be focused on thousand kernels weight in addition to increasing the number of kernels per spike.更多还原