论文部分内容阅读
1.去杂去劣,提高亲本纯度。杂交种亲本的纯度,决定了杂种一代种子的纯度。混杂或种性退化的亲本生产出来的杂交种子,必然严重混杂。所以,在杂交制种时必须用纯度高、种性优良的亲本种子,这样才能生产出质量高的杂交种子。同时,还必须在育苗床、分苗前、定植前、杂交授粉前根据亲本的特征、特性分次严格选择,去掉不符合亲本标准的植株。保证杂种一代有一个稳定的遗传基础。
Go to miscellaneous inferior, improve the purity of the parent. The purity of the hybrid parent determines the purity of the hybrid seed. Hybrid seeds produced by mixed or degenerate parents are bound to be seriously mixed. Therefore, the hybrid seed production must be high purity, good seed quality parents, in order to produce high-quality hybrid seed. At the same time, must also be in nursery bed, before the seedling, before planting, before pollination according to the characteristics of the parent, the characteristics of the strict selection, remove the plants do not meet the standards of the parent. Ensure that the hybrid generation has a stable genetic basis.