大白菜-结球甘蓝4号单体异附加系的鉴定

大白菜-结球甘蓝异附加系是利用结球甘蓝的优良基因对大白菜进行品种改良的中间材料，在遗传理论研究和育种实践中均具有重要应用价值。本研究以大白菜-结球甘蓝异源三倍体（AAC， 2n=29）与二倍体大白菜（AA，2n=20）回交一代的自交后代为材料，经过细胞学鉴定，从中筛选出大白菜-结球甘蓝4号单体异附加系，对其减数分裂和植株性状进行了观察与调查。该异附加系的获得为研究芸薹属A、C基因组的亲缘关系，以及向大白菜中导入结球甘蓝的优良基因，扩大种质遗传背景提供了基础材料。

Identification of a Chinese Cabbage-head Cabbage Monosomic Alien Addition Line CO-4-1

Chinese cabbage - head cabbage alien addition lines were middle materials to genetic improvement in Chinese cabbage using good genes of head cabbage, and have important value in genetic theory research and breeding practice. In this study, the mosomic addition line named CO-4-1(Chinese cabbage with 4# chromosome from cabbage) from the progenies of AAC(2n=29)×AA(2n=20)was obtained by cytology identification,observed and investigated the PMC meiosis behavior and the field character of the plants.The obtained alien addition lines would be used to explore the relation between A and C genomes, transmitting good genes to Chinese cabbage, genome directionally widening genetic background of Chinese cabbage and increasing genetic diversity.