结球甘蓝1号和4号染色体双三体及其初级三体的分离与鉴定  

Identification of the Double Trisomic and Its Primary Trisomics in Cabbage

作　　者：祝海燕[1] 张成合[1] 申书兴[1] 王东平[1] 郭丽娟[1] 

机构地区：[1]河北农业大学园艺学院,保定071001

出　　处：《园艺学报》2005年第4期695-697,共3页Acta Horticulturae Sinica

基　　金：河北省自然科学基金项目(300108)

摘　　要：在结球甘蓝同源三倍体与二倍体杂交子代中,获得了1个2n+2的非整倍体植株,经细胞学鉴定和核型分析,确认该2n+2植株为1号和4号双三体,并由此进一步分离鉴定出了1号和4号两个初级三体。1号初级三体的主要特征是植株矮小,株高仅为正常二倍体的1/3左右;4号初级三体的主要特征是花期提早,较正常二倍体提早约14 d。1号和4号两个初级三体n+1雌配子的传递率分别为8.89%和11.54%。An aneuploid plant with 2n ＋ 2 = 20 chromosomes was obtained from progenies of 3 × 2x in cabbage. By meiosis observation and karyotype analysis, the aneuploid plant was showed a double trisomicswith extra chromosomes No. 1 and No. 4 which come from this double trisomics, the primary trisomic-1 and primary trisomic-4 were obtained. The two primary trisomics were obviously different in plant hight and anthesis. The transfer rate of n ＋ 1 female gametes was 8.89% in trisomic-1 and 11.54% in trisomic-4.

关 键 词：甘蓝 双三体 初级三体 

分 类 号：S635.1[农业科学—蔬菜学]