| Home | E-Submission | Sitemap | Editorial Office |  
top_img
Korean J. Pl. Taxon > Volume 48(4); 2018 > Article
Korean Journal of Plant Taxonomy 2018;48(4): 278-288.
doi: https://doi.org/10.11110/kjpt.2018.48.4.278
Cytotype distribution and ecology of Allium thunbergii (= A. sacculiferum) with a special reference to South Korean populations
Baasanmunkh SHUKHERDORJ1, Ju Eun JANG1, Martin DUCHOSLAV2 , Hyeok Jae CHOI1
1Department of Biology and Chemistry, Changwon National University, Changwon 51140, Korea
2Plant Biosystematics and Ecology Research Group, Department of Botany, Faculty of Science, Palacký University, CZ-783 71 Olomouc, Czech Republic
Correspondence :  Hyeok Jae CHOI ,Email: hjchoi1975@changwon.ac.kr
Received: April 3, 2018  Revised: October 12, 2018   Accepted: December 8, 2018
Abstract
Polyploidization plays an important role in generating the current high diversity of plants. Studies of the distributional patterns of diploid and derivative polyploid races have provided important insights into the evolutionary process and cryptic speciation by polyploidization within and between closely related taxa defined on the basis of their morphology. Allium thunbergii and A. sacculiferum, occurring throughout eastern Russia, eastern China, Korea, and Japan, are examples of closely related species with unsolved taxonomic relationships. A total of 97 and 65 individuals from 26 and 13 populations of A. thunbergii (including var. thunbergii, var. deltoids, and var. teretifolium) and A. sacculiferum, respectively, were studied to determine their ploidy. The geographic structure and habitat differentiation of the cytotypes were also analyzed. The main cytotype of A. thunbergii was diploid (92.3% in total; the rest were tetraploids). In contrast, the majority of A. sacculiferum plants were tetraploids (69.2% of the total; the rest were diploids). No populations of the studied taxa harbored both cytotypes. Allium thunbergii was more often found at higher elevations than A. sacculiferum, and it tended to occur more frequently on rocky slopes and below forests in mountainous areas. On the other hand, A. sacculiferum occurred at forest margins and in lowland pastures. The cytotypes differed with respect to the elevation; diploids were found more frequently at higher elevations than tetraploids. The results of this study and additional biosystematics data indicate that the morphological characteristics of A. thunbergii and A. sacculiferum may be influenced by polyploidization and by their adaptation to various habitat conditions and that A. thunbergii and A. sacculiferum do not clearly fulfill the requirements of any species concept. Consequently, we propose that A. sacculiferum be considered as an additional synonym of A. thunbergii. Additionally, Allium thunbergii var. deltoides is unified into A. thunbergii var. thunbergii.
KeyWords: Allium thunbergii, Allium sacculiferum, cytotype, polyploidy, habitat differentiation
Editorial Office
Korean Journal of Plant Taxonomy
Department of Life Sciences, Hallym University, Chuncheon 200-702, Korea
TEL: +82-33-248-2095   FAX: +82-33-256-3420    E-mail: kjpt1968@gmail.com
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © Korean Society of Plant Taxonomists. All rights reserved.