线纹香茶菜狭基变种和线纹香茶菜细花变种的染色体核型分析

摘要

[ Objective] This study aimed to conduct the karyotype analysis of R. Lophanthoides var. Gerardianus and R. Lophanthoides Hara var. Graciliflorus chromosomes. [ Method ] Vigorously growing shoot tips of R. Lophanthoides var. Gerardianus and R. Lophanthoides Hara var. Graciliflorus were stained for section preparation to observe and analyze the chromosomes. [ Result ] Karyotype formula of R. Lophanthoides var. Gerardianus isK(2n) = 2x = 24 = 18m + 4sm, suggesting that this species belongs to category 2A of Stebbins; karyotype formula of R. Lophanthoides Hara var. Graciliflorus is K(2n) =2x =24 = 16m + 8sm, suggesting that this species belongs to category IB of Stebbins. [Conclusion] R. Lophanthoides var. Gerardianus is more primitive compared with R. Lophanthoides Hara var. Graciliflorus.%[目的]对线纹香茶菜狭基变种[ Radbosia lophanthoides var.gerardianus (Benth.) Hara]和线纹香茶菜细花变种[Radbosia lophanthoides Hara var.graciliflorus (Benth.) Hara]的染色体进行核型分析.[方法]分别对线纹香茶菜狭基变种和线纹香茶菜细花变种生长旺盛的茎尖进行染色,压片后对它们的染色体进行观察和分析.[结果]线纹香茶菜狭基变种的核型公式为K(2n) =2x =24=18m+4Sm,属2A型.线纹香茶菜细花变种的核型公式为K(2n) =2x =24=16m +8Sm,属1B型.[结论]线纹香茶菜细花变种比线纹香茶菜狭基变种更进比.