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对4个优良普×爆组合连续选优后代F3,F4,F5,BC1S1,BC1S2,BC1S3,BC2S1,BC2S2和BC2S3的爆花率、膨 化倍数、穗粒重和百粒重的分析结果表明:各世代不同组合穗粒重和百粒重的平均值、变异系数以及优于亲本的植株 数均存在较大差异,而爆花率和膨化倍数的差异较小;回交后代连续自交较直接连续自交穗粒重和百粒重有所减小, 而爆花率和膨化倍数增大;各世代所有性状均存在较大变异,且以穗粒重最大,爆花率最小,而且随着选择世代的增 加,穗粒重和百粒重均明显减小,而爆花率和膨化倍数明显增大;各世代爆花率和膨化倍数与爆裂亲本多呈显著或极 显著正相关,而穗粒重和百粒重与亲本多呈显著或极显著负相关。
The results of popcorn ratio, puffing percentage, kernel weight per panicle and hundred kernel weight of F3, F4, F5, BC1S1, BC1S2, BC1S3, BC2S1, BC2S2 and BC2S3 of four elite poplar combinations showed that There was a big difference between the average grain weight and the average grain weight per 100-kernel weight, the coefficient of variation and the number of plants superior to the parent in different generations, but the difference between popping rate and puffing percentage was small. The grain weight per panicle and 100-kernel weight decreased, while the popping rate and puffing ratio increased. All the traits of each generation had large variation, and the grain weight per ear was the highest and the rate of popping was the smallest. The generation increase, grain weight per spike and weight per 100 grains decreased significantly, but the popping rate and puffing percentage increased obviously. The popping rate and puffing percentage of each generation had significant or extremely significant positive correlation with popping parents, Heavy and 100-grain weight and the parents were mostly significant or very significant negative correlation.