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文章分析了44个亚种间杂交组合的简单相关、偏相关和通径系数。评价了优良组合的杂种优势率。结果表明,单株产量与单株有效穗数和单穗粒重有极显著的正偏相关。纠正了简单相关分析中的某些假象相关。通径分析认为单穗粒重对单株产量的直接效应最大。在44个组合中,有9个组合的单株产量比对照汕优63增产20％以上,最高的增产97%。亚种间杂交稻以大穗型为主,提高结实率是亚种间杂交稻新组合选育的关键措施。
The article analyzed the simple correlation, partial correlation and path coefficient of 44 subspecies hybrid combinations. The excellent combination of heterosis rates was evaluated. The results showed that there was a significant positive correlation between single plant yield and panicles per plant and grain weight per panicle. Corrected some artifacts in simple correlation analysis. Path analysis showed that the direct effect of grain weight per plant on the yield per plant was the highest. Among the 44 combinations, the yield of 9 combinations increased more than 20% and the highest increased 97% compared with the control Shanyou 63. Inter-subspecies hybrid rice is dominated by large panicle type. Increasing the seed setting rate is the key measure for new combinations of inter-subspecific hybrid rice.