Abstract
Chrysanthemum zawadskii Herbich is widely distributed from northern Europe to East Asia. It has been reported that various ploidy levels ranging from diploid (2n = 2x = 18) to decaploid (2n = 10x = 90) are distributed in Korea. The diploid populations of C. zawadskii, however, have limited habitats, with only four populations from two locations compared to polyploids that are widely distributed in Korea. During recent biodiversity research on the C. zawadskii complex, new habitats of diploid populations of C. zawadskii not reported earlier in Korea were identified. To understand the speciation mechanism accompanying polyploidization of the C. zawadskii complex, it was necessary to investigate the features of these new populations as to whether they identical to or different from previously reported diploid populations. For this purpose, we identified the number and karyotypes of somatic chromosomes in four new diploid populations and compared the morphological features. It was found that the new diploid populations differed slightly in terms of the size and color of the flowers and in the shape of the leaves, with continuous variations. Representative karyotypes of the new populations were included in previously reported diploid karyotypes, but the numbers and locations of satellite chromosomes differed. In addition, we found that one of them is a sympatric population with different ploidy levels, including diploid, tetraploid, and hexaploid. From these results, it was confirmed that morphological and cytological variations exist among diploid populations in the C. zawadskii complex.
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Claims 5
Claim · model-written summary
New diploid habitats were identified in Korea.
- Taxon
- C. zawadskii
Chrysanthemum zawadzkiie0 - Outcome
- new habitats of diploid populationse0
- Setting
- Koreae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“new habitats of diploid populations of C. zawadskii not reported earlier in Korea were identified”
Claim · model-written summary
New diploid populations varied continuously and slightly in flower size and color and leaf shape.
- Taxon
- Chrysanthemum zawadskiiChrysanthemum zawadzkiit0
- Outcome
- size and color of the flowers and in the shape of the leavese0
- Qualifier
- continuous variationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“new diploid populations differed slightly in terms of the size and color of the flowers and in the shape of the leaves, with continuous variations”
t0“Chrysanthemum zawadskii”
Claim · model-written summary
New diploid karyotypes fell within previously reported diploid karyotypes.
- Taxon
- Chrysanthemum zawadskiiChrysanthemum zawadzkiit0
- Outcome
- Representative karyotypes of the new populationse0
- Comparator
- previously reported diploid karyotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Representative karyotypes of the new populations were included in previously reported diploid karyotypes”
t0“Chrysanthemum zawadskii”
Claim · model-written summary
Satellite chromosome numbers and locations differed.
- Taxon
- Chrysanthemum zawadskiiChrysanthemum zawadzkiit0
- Outcome
- numbers and locations of satellite chromosomese0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“numbers and locations of satellite chromosomes differed”
t0“Chrysanthemum zawadskii”
Claim · model-written summary
One population included sympatric diploid, tetraploid, and hexaploid plants.
- Taxon
- Chrysanthemum zawadskiiChrysanthemum zawadzkiit0
- Outcome
- sympatric population with different ploidy levels, including diploid, tetraploid, and hexaploide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one of them is a sympatric population with different ploidy levels, including diploid, tetraploid, and hexaploid”
t0“Chrysanthemum zawadskii”