蜘蛛抱蛋属植物的核型不对称性分析(英文)  

Karyotype Asymmetry of Aspidistra(Convallarieae,Ruscaceae)

作　　者：乔琴[1,2] 张长芹[1] 马永鹏[1,2] 田伟[1,2] 

机构地区：[1]中国科学院昆明植物研究所,云南昆明650204 [2]中国科学院研究生院,北京100049

出　　处：《云南植物研究》2008年第5期565-569,共5页Acta Botanica Yunnanica

基　　金：The National Natural Science Foundation of China(30571137,30770139);The Ministry of Science and Technology of China(2005DKA21006)

摘　　要：报道了蜘蛛抱蛋属(Aspidistra)两种植物的染色体数目和核型,其中河口蜘蛛抱蛋(A.hekouensi)的染色体数目(2n=38)为首次报道,四川蜘蛛抱蛋(A.sichuanensis)染色体数目也为2n=38,但其核型与以往的报道有差别。使用染色体内不对称系数(A1)和染色体间不对称系数(A2)对该属34种植物核型的不对称性进行了分析,结果表明该属植物的核型似乎并没有向不对称性增强的方向演化。Two species of Aspidistra from Yunnan, China, were cytologically studied. The chromosome number of A. hekouensis, 2n = 38, is reported for the first time. The chromosome number of A. sichuanensis, also 2n = 38, was consistent with earlier reports, but the karyotype differs from the previous report. Furthermore, we used two numerical parameters, A1 （intrachromosomal asymmetry index） and A2 （interchromosomal asymmetry index）, to estimate the karyotype asymmetry in 34 species of. The results showed that there is no predominant trend towards an increasing of asymmetry of the karyotype in Aspidistra.

关 键 词：蜘蛛抱蛋 核型不对称性 染色体内不对称系数 染色体间不对称系数 

分 类 号：Q943[生物学—植物学]