淫羊藿属十二个种的核型  

Karyomorphology of Twelve Species in Epimedium (Berberidaceae)

作　　者：盛茂银[1] 陈庆富[1] 

机构地区：[1]贵州师范大学生物技术与工程学院植物遗传育种研究所

出　　处：《云南植物研究》2007年第3期309-315,共7页Acta Botanica Yunnanica

基　　金：贵州中药现代化专项基金(黔科合农字[2005]5052号)

摘　　要：用细胞压片法对12个淫羊藿属(Epimedium)植物的根尖有丝分裂进行了观察,并对其核型进行了比较研究。结果表明:这12种淫羊藿在核型上基本相似,都有1对中间随体染色体,而且都为对称核型。粗毛淫羊藿(E.acuminatum)、印江淫羊藿(E.yinjiangense)、单叶淫羊藿(E.simplicifloum)、巫山淫羊藿(E.wushanense)、光叶淫羊藿(E.myrianthum)、宝兴淫羊藿(E.davidi)、罗甸淫羊藿(E.luodianense)、木鱼坪淫羊藿(E.franchetii)、箭叶淫羊藿(E.sagittatum)、E.pubigerum、高山淫羊藿(E.alpinum)等11个种的核型公式均为2n=2x=6m(2SAT)+6sm,而黔岭淫羊藿(E.leptorrhizum)的核型公式为2n=2x=8m(2SAT)+4sm。结果显示12种淫羊藿的体细胞染色体数目均为2n=12,基数X=6;都属于对称核型、都有1对中间随体;染色体均为m、sm两种类型。The karyotypes of twelve barrenwort species were studied by means of the cytological observation of root-tips. The results show that their karyotypes are similar to each other, with one pairs of middle satellite chromosomes and symmetric karyotype. Among them, the karyotype formulas of Epimedium sagittatum, E. myrianthum, E. acuminatum, E. wushanense, E. simplicifloum, E. yinjiangense , E. luodianense , E. davidi , E. pubigerum , E. franchetii and E. alpinum are 2n = 2x = 6m （2SAT） ＋ 6sm, and E.leptorrhizum 2n = 2x = 8m （2SAT） ＋ 4sm. Results of karyotypes analysis supported the opinion of the barrenwort is very conservative in evolution, Our karyotype study suggested that genus Epinedium should be the oldest group in the family of Berberidaceae.

关 键 词：淫羊藿 核型 系统关系 

分 类 号：Q943[生物学—植物学]