摘要
金花茶是山茶属的珍稀植物,目前在我国广西南部已发现20个种和变种,但做过染色体核型研究的仅有5个种。本文首次报道凹脉金花茶(Comellia impressinervis)的核型,并结合显脉金花茶(C. euphlebia),金花茶(C. chrysantha),小金花茶(C. microcarpa)的核型作了分析比较,意在为研究金花茶的来源。
This article deals with the comparison of karyotype of 4 species of Camellia sect. Chrysantha. The karyotype of Camellia impressinervis is reported here for the first time. The karyotype formula, according to Levan et al., is K(2n) = 20m+ 4sm+ 2 st. The somatic chromosomes in root-tip cell of C. impressinervis, C. chrysantha, C. microcarpa hare been found to be 20 with median, 8 with submedian and 2 with subterminal constrictions. Upon a comparison of the karyotype of these three species, the arrangement of the chromosomes are different. The relative length of chromosome varies according to species, and C. microcarpa with a wider range. While in C. euphtebia 18 with median, 12 with submedian and without subterminal constrictions. Therefore these 4 species of sect. Chrysantha are karyotypically dissimilar.According to Stebbins' karyotypic asymmetry, C. impressinervis, C. euphlebia, C. chrysantha belong to '2 A' type and C. microcarpa belongs to ' 2 B' type.
出处
《广西植物》
CAS
CSCD
北大核心
1991年第2期157-161,共5页
Guihaia
关键词
山茶属
金花茶
核型
Camellia
Species of Sect. Chrysantha
Karyotype
