山西省种植杂交高粱历史久,面积大,品种多,在农业生产上发挥了重要的增产作用。近年来,由于繁殖体系不够完善,亲本种子混杂退化较严重,使杂种纯度日益降低,大田杂株率相当高,严重地影响着杂种优势 Shanxi Province, hybrid sorghum long history, large area, more varieties, in agricultural production has played an important role in increasing production. In recent years, due to imperfect breeding system, more serious degradation and degradation of parental seeds, the decreasing purity of hybrids and the high rate of heterosis in the field, which seriously affect the heterosis