结果表明:在广州早晚季种植的国际水稻研究所育成的IR品种,广义遗传力有相似的倾向,出穗日数、株高、千粒重、10粒谷长、10粒谷宽、谷长宽比均较高。单株穗重遗传变异系数较大。性状相关系数的显著性测定,早晚季趋势相似。相关和通径分析表明:每穗实粒数、有效穗数和千粒重与单株穗重呈正相关,尤以每穗实粒数无论直接作用或间接作用贡献最大。 The results showed that the general heritability of IR cultivars cultivated at the International Rice Research Institute planted in Guangzhou early and late seasons had similar tendency, the heading date, plant height, 1000-grain weight, 10 grain length, 10 grain width and valley length-width ratio were all higher . The coefficient of variation of panicle weight per plant was larger. Significant correlation coefficient of trait determination, early and late season similar trend. Correlation and path analysis showed that there was a positive correlation between seed number per panicle, effective panicle number and 1000-grain weight and panicle weight per panicle, especially for the direct effect or indirect effect per panicle.