关玉竹染色体形态学研究

Morphological Analysis on Chromosome of Polygonatum odoratum (Mill.) Druce

目的对长白山地区分布的关玉竹体细胞染色体计数,对其进行核形态学研究。方法采用常规压片法。结果关玉竹的染色体数目为2n=20,核型公式为K(2n)=2X=2sm(2SAT)+8sm+10m,属"2B"类型,核型不对称系数为61.71%。结论基于观察结果分析了关玉竹染色体对称程度、类型及染色体组成。关玉竹染色体的随体结构为首次报道。

Objective To study the karyomorphology of Polygonatum odoratum （ Mill. ） Druce. from Changbai mountain. Methods Conventional pressed slice method was employed. Results The chromosomal number of S. chinensis was 2n = 20, the karyotype belonged to ＂2B＂ and was formulated as K（2n） = 2X = 2st ＋ 8sm ＋ 10m, the asymmetry index was K% =61.71%. Conclusion Detailed analysis was consequently displayed on symmetrical degree, chromosomal type and compositions of P. odoratum. The chromosomal morphostructure of P. odoratum was reported for the first time.