用分期播种法和系×测验系法分别测定了 4个主穗小穗数在 2 5～ 2 9个的多小穗小麦品系的多小穗性的稳定性及其在杂种一代中的表现 ,结果表明 ,4个多小穗品系的主穗小穗数年度间变化不大 ,多小穗性表现稳定 ,在杂种一代中 ,4个品系的多小穗性均存在一定的杂种优势 ,呈部分显性遗传 ,显性度因材料、组合不同有较大差异 ( 0 .0 892～0 .60 0 0 ) ,其中SW94 3 0 92 1、90 2 71为一般配合力较优的多小穗基因资源 The multi-spikelet stability of 4 spikelets with spikelet number from 25 to 29 and their performance in hybrids were determined by staging sowing method and pedigree × test method. The results showed that the spikelets of four spikelets did not change much during the years, and the stability of many spikelets was stable. In the hybrid generation, the four spikelets showed some heterosis, The dominant heredity and the dominant degree have great difference (0. 0892 ~ 0. 60 0 0) due to different materials and combinations. Among them, SW94 3 0 92 1, 90 2 71 is the more spikelet gene with better general combining ability Resources