Karyomorphology of eighteen species of genus Epimedium (Berberidaceae) and its phylogenetic implications
Karyomorphology of eighteen species of genus Epimedium (Berberidaceae) and its phylogenetic implications
复制标题
DOI：
10.1007/s10722-010-9556-6
复制
发表时间：
2010-12-01
影响因子：
2
通讯作者：
Tian, Xing-Jun
中科院分区：
文献类型：
--
作者：
Sheng, Mao-Yin;Wang, Ling-Jiao;Tian, Xing-Jun
本文报道了18种淫羊藿属植物的核形态。在18种植物中，8个分类群的核形态均为首次报道，它们分别是：E.ecalcaratum、E.pauciflorum、E.lishihchenii、E.dolichostemon、E.pudingense、E.baojingense、E.Yingjiangense和E.Shuichengense。除盈江龙眼2n=4x=24外，其余物种的染色体数目均为2n=2x=12。四倍体在淫羊藿属中首次报道。本研究所研究的淫羊藿属植物均具有统一的核型，除细根淫羊藿外，其余均为中着丝粒和亚中着丝粒染色体，其中第六对染色体为亚远中着丝粒染色体。染色体对1或2的短臂近端常有次生皱缩现象。所有被调查物种的核型对称性均为相对原始的1A、2A或3A。讨论了小檗科淫羊藿属植物的种类、属下和属间关系。
The karyomorphology of 18 Epimedium species were reported in this study. Among 18 species, the karyomorphology of eight taxa, namely E. ecalcaratum, E. pauciflorum, E. lishihchenii, E. dolichostemon, E. pudingense, E. baojingense, E. yingjiangense and E. shuichengense were reported for the first time. The chromosome numbers of all species studied are 2n = 2x = 12, except E. yingjiangense 2n = 4x = 24. Tetraploid was reported in genus Epimedium for the first time. All the Epimedium species, investigated in the present research, have a uniform karyotype with two types of chromosome, metacentric and submetacentric, except E. leptorrhizum and E. sagittatum, of which the sixth pair of chromosomes were subteleocentric. A secondary constriction was commonly found on the proximal side of the short arm of the chromosome pair 1 or 2. The karyotype symmetry of all investigated species was relatively primitive 1A, 2A or 3A. The speciation, infrageneric and intergeneric relationship of Epimedium in Berberidaceae were discussed.