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通过１５个杂交早稻组合生育期、单穴有效穗、每穗总粒数、结实率、千粒重对产量的回归、相关和通径分析［１，２］，认为影响杂交早稻产量的最重要因子为有效穗，其次是每穗总粒数和生育期。本文提出杂交早稻组合应符合“足穗、适粒和中熟”的要求。具体是：分蘖力强，有效穗多（单穴有效穗１０个以上），穗型中等偏大（每穗总粒数１２５粒左右），全生育期１１５ｄ结实率８０％以上，千粒重２６ｇ左右。
Through the regression, correlation and path analysis of 15 hybrid early rice combinations in their growth stages, single-acre effective panicle, total grain number per panicle, seed setting rate and 1000-grain weight per plant, the most important factor influencing the yield of early hybrid rice was Effective panicle, followed by the total number of grains per panicle and growth period. This paper proposes that the hybrid early rice combination should meet the requirements of “full spike, proper grain and medium maturity”. Specifically, the tillering ability is strong, the effective spike is more (more than 10 effective spikes per ear), the spike type is moderately large (about 125 spikelets per spike), the seed-setting rate is more than 80% at 115 days in the whole growth period, and the grain weight is about 26g.