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黑斑病[Ａｌｔｅｒｎａｒｉａｂｒａｓｓｉｃａｅ(Ｂｅｒｋ.)Ｓａｃｃ.]是近年来在我国北方流行的大白菜真菌病害,开展大白菜抗黑斑病育种已成为当今生产与科研中一项紧迫的任务。根据体细胞无性系变异的理论,植物的离体组织在分化成愈伤组织的过程中,细胞染色体的数目或结构会
Alternaria (Alternaria brassicae (Berk.) Sacc.) Is a fungal disease of Chinese cabbage that is endemic to northern China in recent years. It has become an urgent task in modern production and scientific research to carry out the breeding of Chinese cabbage against black spot. According to the theory of somaclonal variations, the number or structure of the chromosomes of a cell during its differentiation into callus