大叶龙胆的染色体核型分析  

Karyotype Analysis in Gentiana Macrophylla

作　　者：沙伟[1] 杨晓杰[1] 白春和 

机构地区：[1]齐齐哈尔师范学院生物系

出　　处：《齐齐哈尔师范学院学报（自然科学版）》1993年第1期23-25,共3页

摘　　要：本文报道了大叶龙胆(Gentiana macrophylla Pall)的核型公式为K(2n)=2X=26=2M+2m+2sm,核型为“2A”型,核型不对称系数为57.73％,染色体相对长度组成为2n=26=2L+12M_2+10M_1+2S,染色体总长度为28.The present paper deals with cytological study of Gentiana macrophylla Pall. The number of somatic chromosomes in root-rips of seedings has beenfound to be 2n = 26,the karyotype formula of Gentiana macrophylla is K(2n) =2X=26 = 2M+22m+2sm,and belongs to'2A' of Stebbins karyotype symmetry. The unsymmetrical karyotype coefficient is 57. 73%.The species chromosome compositionof relative length is 2n = 26=2L+ 12M2+10M1+2S. The total length of the chromosome is 28. 34 μm.

关 键 词：染色体组型 秦艽 龙胆科 

分 类 号：Q949.776.4[生物学—植物学]