摘要
白豆杉Pseudotaxus chienii(Cheng)Cheng是我国裸子植物特有属之一,雌雄异株。根尖细胞染色体分析表明:雌株有一对异形性染色体,异配性别,属ZW型;雄株是同配性别,属ZZ型。雌株的核型为2n=2x=24=22m(2SAT+ZW)+2T,雄株的核型为2n=2x=24=22m(2SAT+ZZ)+2T。 Giemsa C-带显示,Z染色体长短臂均具端带,W染色体不显带。
Pseudotaxus chienii (Cheng) Cheng is one of endemic genera of gymnosperms in our country, h is dioecious. Through the chromosomal analysis in the cells of root tip, it is shown below: The female plant has a pair of heteromorphic sex chromosomes. It is heterogamctic-sex and belongs to Z W type. The male plant is homogametic-sex and belongs to Z Z type. The karyotypic formula of the female plant is 2n = 2x = 24 = 22m(2SAT + ZW)+2T, while that of the male plant 2n = 2x = 24 = 22m(2SAT ZZ)+2T.The Giemsa C-banding is shown that both the long arm and short arm of Z chromosome have telomeric band and W chromosome shows no band.
基金
国家自然科学基金
关键词
白豆杉
性染色体
染色体组型
Pseudotaxus chienii, Sex Chromosome, Karyotype, Banding Pattern
