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1981和1982年共对600余个小麦单交组合进行了F_1杂钟优势的调查,并对其产量性状作了回归分析。结果表明:1、单株生产力、单株穗数、每穗粒数和干粒重都普遍存在着明显的各类正向优势,其中以单株生产力的优势最强;2、在构成单株生产力的三因素中,单株穗数的正向杂种优势、超亲优势和超标准优势最高,干粒重各类正向优势所占比例最大,主穗粒数的各类正向优势均相对较低;3、单株生产力及其构成三因素的各类优势在不同组合间有着很大差异,尤以单株穗数杂种优势的变化幅度最大,这些表现又多与其双亲平均值存在着极显著的正相关。
In 1981 and 1982, more than 600 wheat single crosses were investigated for the superiority of F 1 chrysanthemums, and regression analysis was made on their yield traits. The results showed that: 1, There were obvious positive advantages in productivity per plant, spikes per panicle, grains per spike and dry weight. Among them, the advantage of single plant productivity was the strongest. Among the three factors of productivity, the positive heterosis, super-pro-heterosis and super-standard heterosis per panicle had the highest, the positive predominance of dry weight was the largest, and the positive heterosis of main panicle number was relatively Lower; 3, the productivity of each plant and its composition of the three types of advantages in different combinations have great differences, especially in the panicle per plant heterosis variation range, these performance more with their parents there is a pole Significant positive correlation.