国产12种乌头属和18种翠雀属植物的细胞学研究(英文)

Cytology of 12 species in Aconitum L. and of 18 species in Delphinium L. of the tribe Delphineae (Ranunculaceae) from China

研究了 1 2种乌头属AconitumL .和 1 8种翠雀属DelphiniumL .植物的染色体。在 1 2种乌头属植物中 ,除粗花乌头A .crassiflorum为四倍体 (2n=4x =3 2 )外 ,其他种类都为二倍体 (2n =2x =1 6 ) ,中甸乌头A .piepunense中有B染色体存在 ,牛扁亚属Aconitumsubgen .Lycoctonum的二倍体植物与乌头亚属Aconi tumsubgen .Aconitum植物的染色体在大小和形态上有明显区别 ;所有 1 8种翠雀属植物都为二倍体 (2n=2x =1 6 ) ,其染色体在大小和形态上极为相似 ,但与乌头亚属的染色体易于区别。翠雀属植物的核型不对称性程度明显高于乌头属植物 ,因此从染色体证据来看 ,翠雀属要比乌头属进化。

Cytology of 12 species in Aconitum L. and of 18 species in Delphinium L. of the tribe Delphineae (Ranunculaceae) from China have been investigated. Only A. crassiflorum is a tetraploid with the chromosome number of 2n=32, and all the other Aconitum species studied are diploids with 2n=16. In A. piepunense, up to six B-chromosomes were observed. All the Delphinium species are diploids with 2n=16; their karyotypes are very similar among the species, and are distinctly distinguishable from those of Aconitum species with respect to the chromosome size, chromosome morphology and karyotype asymmetry. From a cytological view, Delphinium seems to be more advanced than Aconitum, as the karyotypes in Delphinium are more asymmetric than those in Aconitum.