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采用包括基因型×环境互作效应的加性显性加性×加性上位性遗传模型,分析了籼粳杂交穗部性状杂种优势的两年资料.结果表明,7 个穗部性状的杂种优势既由基因型控制也受环境( 年份) 互作效应影响.主穗粒数、主穗长、一次和二次枝梗总长和着粒密度表现较强的正向群体平均优势,而一次和二次枝梗数则表现显著的负向优势.基因型×环境互作预测结果表明,主穗粒数、主穗长、一次枝梗总长在两年中的环境互作表现正效应,一次和二次枝梗数则为负效应,着粒密度和二次枝梗总长表现不同方向的效应.利用IR6615837(P1) 、IR6560085(P2) 、明恢63(P4) 和R669(P6) 进行杂交配组,其杂种后代易获得重穗型的穗部结构,可在超高产育种中加以利用.
Two-year data on the heterosis of panicle traits in indica-japonica hybrids were analyzed using additive-dominance-additive × additive epistasis models including genotype × environment interaction effects. The results showed that the heterosis of seven panicle traits was affected both by genotype control and by environment (year) interaction. Main spike length, main spike length, total length of primary and secondary branches and grain density, but the number of primary and secondary branches showed a significant negative advantage. The results of genotype × environment interaction show that the environmental interaction of main spike grain number, main spike length and total length of primary branch had positive effect in two years, the number of primary and secondary branches was negative effect, grain density and Secondary branch total length of the performance of different directions. The hybrid combinations of IR6615837 (P1), IR6560085 (P2), Minghui63 (P4) and R669 (P6) were used to obtain the panicle structure of the panicle type in super hybrid rice Use it.