亲本自交系是配制杂交种的基础。没有数量足够的亲本配套的自交系,就不能配制出数量充足的杂交种,如果亲本自交系混杂不纯,制成的杂交种质量不高,会降低杂交种应有的增产效果。因此,对亲本自交系的数量和质量要同等重视。基于以上原因,必须冬繁。冬繁可以加快扩繁速度,同时又可以对自交系纯度作进一步鉴 Parental inbred lines are the basis for formulating hybrids. In the absence of a sufficient number of inbred lines of the parents, sufficient quantities of hybrids can not be prepared. If the parental inbreds are impure, the quality of the hybrids produced is not high, which will reduce the yield increase of the hybrids. Therefore, the number and quality of parental inbred lines should be given equal weight. For these reasons, must be winter and winter. Winter and Fan can speed up the expansion of the proliferation, but also for in-line purity can be further Kam