Eleven species of Taxaceae and its related taxa were analyzed by RAPD. 15 primers screened from 80 random primers were found to produce clear patterns and 14 of them showed polymorphic. The results generated by utiliz...Eleven species of Taxaceae and its related taxa were analyzed by RAPD. 15 primers screened from 80 random primers were found to produce clear patterns and 14 of them showed polymorphic. The results generated by utilizing UPGMA method to cluster the genetic distances calculated from RAPD data implied:① both of the two genera, Amentotaxus and Pseudotaxus should be included in Taxaceae; it is not necessary to treat Amentotaxus as a separated family;② Taxaceae could be divided into three tribes, Taxeae (including Taxus and Pseudotaxus), Amentotaxeae and Torreyeae;③ it was supported to constructsect. Pectinatae to show the special taxonomic position of Cephalotaxus oliveri in the genus of Cephalotaxus ;④ the 11 species were clustered into three groups corresponding to the Taxaceae,Cephalotaxaceae and Podocarpaceae; Podocarpaceae was more close to Cephalotaxaceae than it to Taxaceae.展开更多
提议贡山三尖杉的新名称Cephalotaxus talonensis Cheng et Feng ex S.G.Lu et X.D.Lang替代不合法的旧名称Cephalotaxus lanceolata K.M.Feng in Cheng et al.(晚出同名)。对比贡山三尖杉和三尖杉Cephalotaxus fortunei Hooker的模式...提议贡山三尖杉的新名称Cephalotaxus talonensis Cheng et Feng ex S.G.Lu et X.D.Lang替代不合法的旧名称Cephalotaxus lanceolata K.M.Feng in Cheng et al.(晚出同名)。对比贡山三尖杉和三尖杉Cephalotaxus fortunei Hooker的模式标本和自然生长状态下的叶片形态,支持将贡山三尖杉处理为种的等级,不赞同Silba(1990)将贡山三尖杉降为三尖杉的变种[Cephalotaxus fortunei Hooker var.lanceolata(Feng)Silba]。文中提供4幅参照图片。展开更多
文摘Eleven species of Taxaceae and its related taxa were analyzed by RAPD. 15 primers screened from 80 random primers were found to produce clear patterns and 14 of them showed polymorphic. The results generated by utilizing UPGMA method to cluster the genetic distances calculated from RAPD data implied:① both of the two genera, Amentotaxus and Pseudotaxus should be included in Taxaceae; it is not necessary to treat Amentotaxus as a separated family;② Taxaceae could be divided into three tribes, Taxeae (including Taxus and Pseudotaxus), Amentotaxeae and Torreyeae;③ it was supported to constructsect. Pectinatae to show the special taxonomic position of Cephalotaxus oliveri in the genus of Cephalotaxus ;④ the 11 species were clustered into three groups corresponding to the Taxaceae,Cephalotaxaceae and Podocarpaceae; Podocarpaceae was more close to Cephalotaxaceae than it to Taxaceae.
基金supported by the National Forestry Public Welfare Foundation of China(Grant no.200804024)the National Natural Science Foundation of China(Grant nos.30770164&30970186)
文摘提议贡山三尖杉的新名称Cephalotaxus talonensis Cheng et Feng ex S.G.Lu et X.D.Lang替代不合法的旧名称Cephalotaxus lanceolata K.M.Feng in Cheng et al.(晚出同名)。对比贡山三尖杉和三尖杉Cephalotaxus fortunei Hooker的模式标本和自然生长状态下的叶片形态,支持将贡山三尖杉处理为种的等级,不赞同Silba(1990)将贡山三尖杉降为三尖杉的变种[Cephalotaxus fortunei Hooker var.lanceolata(Feng)Silba]。文中提供4幅参照图片。
