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采用春化和长光照处理技术,大白菜每年可加3～4代。这一技术虽能加快世代繁育速度,但不利于大白菜经济性状和抗病性选择。为使加代与选择同步进行,根据极早熟大白菜对低温及光照要求不严格的特点,近几年我们进行了以下极早熟大白菜加代选育技术的研究。一、试验方法选用生长期50天左右的极早熟大白菜品种及自交材料闽4和新乡3039,秋季分期播于大田和露天温室,使其在自然条件下生长。当大田白菜包球紧实后移至露天温室,露天温室同期植株就地留种,立冬以后加盖温室玻璃,尔后随着外界温度的
The use of vernalization and long light processing technology, cabbage can add 3 to 4 generations per year. Although this technology can speed up the generation of breeding speed, but not conducive to economic traits and disease resistance of Chinese cabbage selection. In order to make the Canadian generation and selection simultaneously, according to the extremely precocious cabbage on the low temperature and light requirements are not strict features, in recent years we conducted the following very early maturity of Chinese cabbage plus the selection and breeding technology research. First, the test method Selection of very mature 50 days growing season of very early maturity cabbage varieties and self-bred materials Min4 and Xinxiang 3039, autumn staged in field and open-air greenhouse, so that it grows under natural conditions. When Daejeon Cabbage ball tightly after the move to the open-air greenhouse, open-field greenhouse in situ plant species in the same period, after the winter stamped greenhouse glass, then as the outside temperature