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通过江苏省杂交晚粳与常规晚粳4轮(年)区域试验结果的对比分析,研究了穗粒结构和产量形成特点。结果表明:杂交晚粳稻相对于常规晚粳稻,每穗实粒数、株高和生育期都有竞争优势,千粒重和结实率不存在差异,但有效穗明显低于常规晚粳。相关分析表明,杂交晚粳产量与分蘖率、每穗实粒数和结实率呈0.01水平显著正相关,与株高、穗数呈0.05水平显著正相关。
Through the comparative analysis of the regional experiment results of late japonica hybrid rice and conventional late japonica rice in Jiangsu Province, the characteristics of grain structure and yield formation were studied. The results showed that the hybrid late japonica rice had competitive advantages in seed number, plant height and growth period per panicle compared with that of conventional late japonica rice. There was no difference between 1000 - grain weight and seed setting rate, but the effective panicle was significantly lower than that of conventional late japonica rice. Correlation analysis showed that there was a significant positive correlation between the yield of late japonica hybrid rice and the tillering rate, the number of grain per spike and the seed setting rate of 0.01, which was significantly and positively correlated with the plant height and spike number of 0.05.