Hyun, Y.D.Kim & H.C.Shin (Asteraceae Bercht. & Presl) is recently
described as a natural hybrid species between A. and A.
and is known to be endemic to Island in Korea, which exhibits unique
flora with many endemic species. In this study, we determined chromosome
numbers, and genome sizes of three species. Chromosome counts showed that three species were all diploid with the chromosome number of 2n = 18 of which A. is first reported here. analysis
illustrated that the basic number of x
= 9 was confirmed from all species. The chromosome sizes ranged from 4.24 μm (in A. ) to 12.14 μm (in A. ) in length, and all
species possessed a pair of SAT-chromosome. As for asymmetry,
of three species were classified into symmetry classes of Stebbins
as 2A and 3A with a high proportion of and submetacentric
chromosome pairs. Genome sizes of A.
, A. ,
and A. were analyzed
using flow cytometry (FCM), estimating 3.926pg (±0026),
3.534pg (±0061), and 2.977pg (±0012), respectively. Although, the in flowering
plants is known to be common from natural population or cultivation, homoploid
hybridization, which is a hybrid without change in chromosome
number, is relatively rare. If A.
is a natural hybrid species, it may be derived from homoploid
hybrid speciation. Our FCM data show the potential for A. to be a natural hybrid, but further investigation is
needed as our results target limited populations and individuals.