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本品种是莱阳市种子公司选育的夏白菜一代杂交种。组合为M9203/变21,双亲均为自亲不亲和系,M9203是由夏阳经多代自交选育而成:变21是由小杂56经多代自交选育。该杂交种在1999～2000年全省夏白菜区域试验中,两年平均每1/15公顷产净菜3666.3千克,比对照鲁白13号增产8.2%:在2001年全省夏白菜生产试验中,平均每1/15公顷产净菜2216.5千克,比对照鲁白13号增产9.6%。该杂交种属夏白菜品种,生长期约53天,开展度45厘
This species is Laiyang City seed companies breeding summer cabbage generation hybrids. Combination of M9203 / change 21, both parents are not self-affinities, M9203 by Xia Yang selfing through multiple generations of breeding: Variety 21 is a small hybrid 56 by multi-generation self-breeding. The hybrids in the province of summer cabbage from 1999 to 2000 regional trials, the average annual two-year net yield of 3666.3 kg per 1/15 hectares, compared with the control Lu Bai 13 yield 8.2%: in 2001 the province summer cabbage production test, On average, 2216.5 kg of net food per 1/15 hectare was produced, an increase of 9.6% over the control Lu Bai 13. The hybrids are summer cabbage varieties, the growth period of about 53 days, the degree of 45%