青菜是我国南方的主要蔬菜。它和其他多种蔬菜一样,具有较明显的杂种优势。无产阶级文化大革命以来,在毛主席革命路线的指引下,在各级党委的关怀下,江苏、广东等省和本市先后开展了青菜杂种优势利用的研究,并已逐步应用于生产。目前,本市利用青菜的杂种优势,主要是为了防止青菜的病害(病毒病)、冻害,以获得秋、冬青菜的稳产高产。 Green vegetables are the main vegetables in southern China. Like many other vegetables, it has obvious heterosis. Since the Great Proletarian Cultural Revolution, under the guidance of Chairman Mao’s revolutionary line and under the care of party committees at all levels, Jiangsu and Guangdong provinces and municipalities successively conducted research on the utilization of heterosis in vegetables and have been gradually applied to production. At present, the city uses the heterosis of vegetables, mainly to prevent the disease of vegetables (virus disease), frost damage, in order to obtain stable yield and yield of autumn and winter vegetables.