J Syst Evol ›› 1981, Vol. 19 ›› Issue (3): 298-303.
• Research Articles •
1. It was observed that somatic chromosome numbers of four species of the genus
Panax L. are as follows: Panax japonicus 2n=24, P. notoginseng 2n=24, P. ginseng
2n=44 and P. quinquefolius 2n=48. The somatic chromosome numbers of P. japonicus
from Lushan and Jinggangshan (Jiangxi Province, China) is different from that of
Japanese population (2n=48). The chromosome numbers (2n=24) of P. notoginseng is
2. The P. japonicus, one of the diploid species, which has the widest geographical
distribution is perhaps the more primitive type among the living species of Panax.
While, the P. ginseng and P. quinquefolius, the tetraploid species, are more advanced
types than the diploid species. The conclusion from cytotaxonomy is thus different
from that of chemical taxonomy.
3. The cytological analysis together with the geographic distribution of this four
species shows that the Southwestern China is the modern distribution center, also the
most variational center, and perhaps the center of origin for the genus Panax L.
Yang Di-Qing. The cyto-taxonomic studies on some species of Panax L.[J]. J Syst Evol, 1981, 19(3): 298-303.
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