Analysis of Brassica campestris L.ssp.chinensis（L.）Makino var.tai-tsai Hort Karyotype
SONG Ting-yu1，HAN Wen-yan1，WU Chun-yan1，SONG Shu-yao1，HE Qi-wei2
1College of Horticulture，Jilin Agricultural University，Changchun 130118，Jilin，China|2Institute of Vegetable，Shandong Academy of Agricultural Sciences，Jinan 250100，Shandong，China
Abstract：The chromosome number and kapyotype analysis of Tai-tsai〔Brassica campestris L. ssp. chinensis（L.）Makino var. tai-tsai Hort〕were studied by using root-tip squashing method in order to obtain accurate cytogenetic information．The results showed that the chromosome number of Tai-tsai diploids is 2n=20，and its karyotype formula is K（2n）=2X=20=7M+2T+St，the composition of relative length of chromosome is 2n=20=2L+4M2+4S，and the chromosome karyotype was 2A．
