Cytotaxonomy of seven species of Epimedium medicinal plants from Chinese

作者 Yan Fulin; He Shunzhi; Xu Wenfen; Li Zhonghong

期刊 Guihaia , 2016,9:36

摘要 In order to provide theoretical basis classification and seed breeding research for the medicinal plants of Epimedium, we studied seven species of medicinal plants of Chinese Epimedium karyotype, using the conventional pressed discmethod, on the basis of related and summary of phase information consult of karyotype analysis. The results showed that the somatic chromosome numbers were 2n=2x=12, the cardinal numbes were x=6. The E. shuichengense, E. glandulosopilosum, E. baojingense, E. wushanense and E. flavum had four pairs of m chromosome and two pairs of sm chromosomes, and karyotype for mul as were 2n=2x=12=8m(2SAT)+4sm, among them, analysis on E. shuichengense and E. glandulosopilosum karyotype was reported for the first time; E. ilicifolium, E. Truncatum 2n=2x=12=6m(2SAT)+6sm. The second pair of chromosomes of E. glandulosopilosum were with the middle satellite, and the first pair chromosome of other species were with the middle satellite. E. glandulosopilosum, E. baojingense, E. wushanense, E. ilicifolium, E. Truncatum and E. flavum belonged to 2A of Stebbins, E. shuichengense belonged to 1A of Stebbins. The results showed that the differentiation degree of Epimedium karyotype was lower, the correlation between geographical distribution, morphological characteristics and karyotype were smaller, and karyotype structure and geographical distribution, morphological characteristics correlation was smaller. Therefore, Epimedium was a more conservative in karyotype evolution of taxa. It was very difficult to identify the barrenwort subordinate species and genetic evolution using the karyotype analysis, even within distant species, its karyotype systematics had limited significance, but in the classification level of genera, karyotype analysis still had larger reference value.