【作者】 瞿小杰； 邹国明； 董然；

【Author】 QU Xiao-jie ZOU Guo-ming DONG Ran (Jilin Agricultural University,Changchun 130118)

【机构】 吉林农业大学园艺学院；

【摘要】 本文以长白山主产的3种橐吾属植物及1种变型为材料,进行染色体和核型研究与分析。结果表明:全缘橐吾(L.mongolica)的核型为2n=2x=58=44m+12sm+2st,核不对称系数59.22%;狭苞橐吾(L.intermedia)的核型为2n=2x=58=32m+26sm,核不对称系数62.89%;蹄叶橐吾(L.fucheri)和多毛蹄叶橐吾(L.form.diabolica)的核型均为2n=2x=58=36m+20sm+2st,核不对称系数分别为61.04%、61.83%。全缘橐吾的核型较原始,而狭苞橐吾的核型较进化。蹄叶橐吾和多毛蹄叶橐吾虽核型公式相同,但染色体长度组成不同,多毛蹄叶橐吾有长染色体,而蹄叶橐吾无长染色体。说明多毛蹄叶橐吾是蹄叶橐吾的变种而不是变型。更多还原

【Abstract】 Three kinds of Ligularia plants and one form from Changbai Mountain are used as materials,For the study and analysis on chromosome karyotypes.the results show that:2n=2x=58=44m+12sm+2st for L.mongolica,index of the karyotypica symmetry (As.k)=59.22%;2n=2x=58=32m+26sm for L.intermedia,As.k=62.89%;2n=2x=58=36m+20sm+2st for L.fischerAs.k=61.04%,2n=2x=58=36m+20sm+2st for L.form.diabolica,As.k=61.83%.The karyotype of L.mongolica is more primitive than others.Although the karyotypica of L.fischeri is the same as L.form.diabolica,the composition of chromosome length is different,L.form.diabolica has the long chromatosome,but L.fischeri has not.the result showed that L.form.diabolica is not the form but the variety of L.fischeri.更多还原