【摘要】 翅果菊属Pterocypsela植物为我国重要的民族传统中药,具有较高的药用和食用价值。本研究报道了台湾翅果菊P.formosana和高大翅果菊P.elata染色体数目和核型,其中前者为首次报道,后者与先前报道一致。结果表明台湾翅果菊和高大翅果菊的体细胞染色体数都是2n=18,前者核型公式为2n=2x=18=4m+14sm,后者为2n=2x=18=2m+8sm+8st,该属植物染色体基数为x=9,二倍体,核型类别均属于"2A"型。首次报道了翅果菊属植物染色体核型不对称指数AI。通过体细胞染色体计数和染色体核型分析了该属在莴苣亚族的亲缘性,及属内物种间的系统进化关系。本研究是运用染色体资料在菊科药用植物系统分类和进化方面的尝试,为该科药用植物的鉴定、新药的亲缘筛选及良种培育提供细胞学依据。更多还原

【Abstract】 Pterocypsela is a very important traditional Chinese medicine from the tribe Cichorieae of Asteraceae.Mitotic chromosome numbers and karyotypes are reported for P. formosana and P. elata from Hunan and Hubei province,China.The former is new and the latter provide confirmation of previous reference.All P. taxa are diploidy with 2n=18 and their basic number is tentatively suggested as x=9.Karyotype of Pterocypsela is 2A and P. formosana with a karyotype formula of 2n=2x=18=4m+14sm,and 2n=2x=18=2m +8sm+8st for P. elata.It is the first time to report the AI value for Pterocypsela in this paper.Cytological data of chromosomal numbers and karyotypes were used to discuss the close relationships of the Pterocypsela genus and the taxonomy of the medicinal plants.更多还原