仲彬草属6个物种的核型与进化研究  

Syudy on Karyotypes and Evolution of 6 Species in Kengyilea

作　　者：张利[1] 周永红[2] 郑有良[2] 张颖[2] 刘世贵[1] 

机构地区：[1]四川大学生命科学学院,成都610064 [2]四川农业大学小麦研究所,都江堰611830

出　　处：《四川大学学报（自然科学版）》2003年第2期361-366,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金 (3 0 2 70 0 99) ;四川省教育厅;科技厅重点项目资助基金

摘　　要：作者对仲彬草属中 6个物种进行了核型分析 ,其核型属于 1B或 2B型 ,除K .batalinii外 ,染色体中均未发现随体 .同时 ,根据Stebbins的核型进化理论和分支系统学的编序、赋值方法 ,对核型的 4个重要性状进行了分析 ,揭示了仲彬草属 6个种的进化水平 .结果表明在这 6个仲彬草物种中进化程度较低的是K .rigidula ,其次为K .gobicola ,而K .mutica ,K .hirsuta ,K .kokonorica和K .The karyotypes of 6 species All the karyotypes belong to 1B or 2B. No satellites have been found except K. batalinii. Furthermore, according to Stebbins' theory of the karyotypic evolution as well as using the method of coding of cladistics, 4 significant characters, the ratio of the longest chromosome to the shortest, the arm ratio in mean, the index of the karyotypic asymmetry and the proportion of chromosome with arm ratio >1.70, were analysed, the evolutional levels of the 6 species were also affirmed. The results indicate that: in the 6 species of Kengyilia, K. rigidula is a relatively primitive species, K. gobicola is relatively advanced species, K. mutica、K. hirsuta、K. kokonorica and K. batalinii are relatively more advanced species.

关 键 词：仲彬草属 核型 进化程度 进化水平 分支系统学 染色体 

分 类 号：Q343.22[生物学—遗传学]