种子质量在生产中起着重要的作用 ,它直接影响优良品种的推广应用。因此要保证白菜杂一代种子纯度 ,应从以下几方面注意把关 :1　种源方面保证有该品种的原种或原原种 ,它是种子纯度的关键。原种在保存过程种 ,要做到标记清楚 ,不同的自交系之间隔离要安全 ,保存场所宜干燥、低 Seed quality plays an important role in the production, which directly affects the popularization and application of fine varieties. Therefore, in order to ensure the purity of the hybrid seed of cabbage, attention should be paid to the following aspects: 1 species source to ensure that the species or the original species, it is the key to the purity of the seed. Seed species in the preservation process, to be clearly marked, different inbred lines isolated to be safe, the storage place should be dry, low