Contrasting the normal karyotype of the diploid Chinese cabbage-pe-tsai,the 25S rDNA hybridization signals were located near the end of 1L,the central section of 2L,the centromere region of 3L and 4L,and the satellite of chromosome 10,respectively.

• 对应于大白菜中期染色体形态图,确定5对25S rDNA信号分别分布在大白菜1号染色体长臂(1L)的近末端,2号染色体长臂(2L)的近中部,3号和4号染色体长臂(3L、4L)的近着丝点处和10号染色体的随体上,信号强度为10号>2号>3号和4号>1号;