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结球大白菜用母株采种能严格选择,缺点是母株贮存期长,易染病,成本高,采种量不稳定。采用小株、娃娃籽采种法,成本虽低,但不能进行性状选择,长期使用易引起混杂退化。又由于大白菜是异花授粉作物,单株不易结实,田间发现优良突变单株,也无法保存后代。扦插法采种可以解决上述诸矛盾。1980年我们用冬贮的玉青白菜为材
Brassica campestris seed production can be strictly selected, the disadvantage is that the mother plant long shelf life, easy to disease, high cost, the amount of instability. The use of small plants, baby seed mining method, the cost is low, but can not be trait selection, long-term use can easily lead to mixed degradation. And because cabbage is cross-pollinated crops, the plant is not easy to fruiting, found in the field of fine mutants, but also can not save offspring. Seed cutting method can solve the above conflicts. In 1980 we use winter storage of green cabbage for the material