扁茎黄芪染色体的核型分析

Karyotype Analysis of Astragalus complanatus Chromosome

扁茎黄芪Astragalus complanatus染色体的核型分析结果表明:体细胞染色体数目为2n=16,核型公式为K(2n)=16=10 m+6 sm,染色体相对长度组成为2 n=16=6M_2+10 M_1,核型不对称系数为59.79％,属于“2A”型,染色体总体积为50.62 μm^3。

Micrograph were used to analyse the number, karyotype and volume of chromosome of Astragalus complanatus. The normal diploid 2n = 16, karyotype formula based on Levean publication (1964) was K(2n) = 16 = 10m + 6sm. According to the method of S. R. Guo, the chromosome relative length was 2n = 16 = 6M2 + 10M1, which belonged to 2A type according to the Stebbins karyotype classification. The total length of chromosome groups was 33.05um, total length of long arms was 19.76 um, from Arano' s method the AS. K % was 59.79% .The total volume of chromosome was 50.6um3 .