关键词: 云杉[45NK], 核型[45CF], 双向不对称系数, 生物学意义

Abstract: The work deals with the karoyomorphlogical data of Picea Dietr. plants in China. It is discussed whether there are relations hips between the karyomorphological variations and evolution of 15 species of spruce in China, there is the biological signification on the classification and photo geographic distribution about the origin to devolopment of the species. And the analysis on the forestry signification about the reserve of the forest germ plasm resourses, breeding and selection of the regenarative species are also discussed. A suggestion is put forward for the first time that Ba.k% parametor of karyotypic asymmetry of bath arm ratio in mean and ratio of longest to shortest of chromo-somes should used to the analysis on genus and species of plants.

Key words: PICEA, KARYOTYPE, BA.K%, BIOLOGICAL SIGNIFICATION