Abstract: The BC₁ progenies derived from allotriploid hybrid (AAC) and diploid Chinese cabbage (AA) were used materials. The Chinese cabbage-cabbage monosomic alien addition line introduced chromosome 3 of cabbage was identified by karyotype analysis of root tip. The results from specific SSR markers for cabbage linkage groups compared with Chinese cabbage showed that the introduced cabbage chromosome in Chinese cabbage-cabbage monosomic alien addition line was grouped into linkage group 03. During reproductive growth, the monosomic alien addition line height is short, the flowering branch is gracility and lodging, the pollen regularity, the pollen activity and seed set ratio are low. And there are a series of abnormal phenomena in meiosis of PMCs, such as chromosome unbalanced separation, backward chromosomes, and so on..

Key words: Chinese cabbage, cabbage, monosomic alien addition line, karyotype analysis, SSR, characters