Keywords
Cimicifugeae
China
chromosomes
karyotype
Russia
How to Cite
Abstract
A comparative karyomorphological analysis was performed on Actaea acuminata, A. asiatica, and A. erythrocarpa. The karyotype of A. acuminata was re-examind; its formula proved to be 2n = 16 = 10m + 2sm + 2st + 2t. This species’ karyotype was found to differ from that of A. spicata (2n = 16 = 10m + 4sm + 2t), thus allowing us to propose a species status of A. acuminata in contrast to the subspecies status (previously suggested by Compton): A. spicata var. acuminata. Karyotype structure of the analyzed A. asiatica from Shandong Province matches previously obtained data for Yunnan Province in China and corresponds to 2n = 16 = 10m + 4sm + 2t. The chromosome set of A. erythrocarpa was investigated in five regions of Russia; its structure proved to be similar among all the analyzed populations and is described by formula 2n = 16 = 10m + 4sm + 2t, consistently with previous findings about this species in Western Siberia. There are differences among the populations in the number and localization of secondary constrictions. A conclusion was made about conservatism of karyotype structure within the genus Actaea.
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