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36个组合14个主要经济性状的研究结果表明:籼粳稻亚种间杂种一代普遍具有明显优势,不同组合、不同性状优势有较大差异。株高、有效穗、穗长、着粒数、单株总重、单株粒重和全生育期等性状均显著超过大值亲本;其中着粒数、单株总量、有效穗、株高均超过对照汕优63和沪科3号并达极显著水平;实粒数和结实率均极显著低于高亲值和对照;相关和通径分析表明:杂种一代单株产量主要受株高、穗长、实粒数、结实率和单株总重的制约,而以结实率的直接影响最大。
The results of 36 combinations of 14 major economic traits showed that the inter-subspecies hybrids of indica and japonica generally have obvious advantages in different combinations and different traits. The characters of plant height, effective panicle, ear length, grain number, total weight of plant, grain weight per plant and whole growth period were all significantly higher than those of the large parent. Among them, the number of grains per plant, the effective panicle, the plant height Both of them surpassed that of Shanyou 63 and Huke 3 and reached the extremely significant level. The seed number and seed setting rate were significantly lower than those of the high-value-pair and control. Correlation and path analysis indicated that the yield per plant of hybrid was mainly affected by plant height , Spike length, seed number, seed setting rate and total plant weight, but the direct impact of seed setting rate was the largest.