中药黄连3种基原植物的核型研究  

Chromosome characteristics of three Coptis species

作　　者：向刚[1] 傅体华[1] 范巧佳[2] 

机构地区：[1]四川农业大学农学院,四川雅安625014 [2]四川农业大学动物科技学院,四川雅安625014

出　　处：《中国中药杂志》2010年第11期1367-1371,共5页China Journal of Chinese Materia Medica

基　　金：国家自然科学基金项目(30370770);四川省学术技术带头人基金项目;国家级特色专业农学专业建设项目

摘　　要：目的:寻找3种黄连起源及三角叶黄连生长地点(区域)狭窄的原因。方法:对3种黄连进行细胞染色体形态、结构和数目研究。结果与结论:3种黄连染色体基数为x=9,均属于C-type染色体,但三角叶黄连的染色体明显比其他2种黄连略大;味连Coptis chinensis和峨眉黄连C.omeinensis染色体均为二倍体(2n=2x=18),三角叶黄连C.deltoidea染色体为同源三倍体(2n=3x=27)。可以解释三角叶黄连种子不育原因及其种群相对独立性和生长分布地点(区域)较狭窄;同时通过染色体等分析初步推断味连和峨眉黄连来源于共同祖先,三角叶黄连产生的途径为某一未知物种通过未减数配子与正常配子的融合产生的。In the present paper,three Coptis species,collected from Sichuan and Chongqing,China,were used for karyotypic analyses.The results indicated that both C.chinensis and C.omeinensis were diploid with chromosome 2n=2x=18,and C.deltoidea was an autotriploid with chromosomes 2n=3x=27,which explained why this species was morphologically so isolated from other species and its sterile and narrow distributing regions.The relationship between C.chinensis and C.omeinensis based on chromosome data was discussed.The probable origin of C.deltoidea was also suggested.

关 键 词：黄连 染色体 核型分析 

分 类 号：R282.7[医药卫生—中药学]