3197A是我省配制杂交高粱应用最多的雄性不育系。近年来,由于3197A的混杂退化,直接影响到杂交高粱的增产作用.为了充分发挥高粱杂交优势,必须认真搞好3197A的提纯工作。 3197A的混杂表现是多方面的:如植株高矮不齐、穗形变短变散、穗轴上一级枝梗的轮数变少、顶端枝 3197A is the most commonly used hybrid sorghum in our province. In recent years, due to the mixed degradation of 3197A, it has a direct impact on the yield increase of hybrid sorghum.In order to give full play to the advantages of sorghum hybridization, the purification of 3197A must be done well. 3197A hybrid performance is multifaceted: If the plants are tall and small, panicles become short and scattered, the number of branches on the cob on the cob decreases, the top branch