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Abstract Detail



Systematics Section/ASPT

Chung, Gyu Young [1], Oh, Byoung-Un  [2], Chung, Kyong-Sook [3], Lee, You-Mi [4], Park, Myung Soon [1], Nam, Bo Mi [1].

Chromosome number diversity of Asteraceae and its evolutionary significance in floristic diversity of Korea.

Asteraceae exhibit great species diversity and economic importance, containing about 1,620 genera with more than 23,500 species worldwide. In South Korea, about 290 species in 95 genera occur, the largest family in Korean vascular plants. We investigated somatic chromosome numbers of 121 Korean native Asteraceae taxa to figure out chromosome number diversity and elucidate evolutionary significance of the diversity in the most diverse family of Korean flora. The somatic chromosome numbers in Korean Asteraceae vary from 2n = 10 (Cirsium schantarense Trautv. & C.A.Mey., Cardueae; Crepidiastrum chelidoniifolium (Makino) Pak & Kawano, Crepidiastrum denticulatum (Houtt.) Pak & Kawano, Sonchus oleraceus (L.) L., Lactuceae) to 2n = 144 (Miyamayomena koraiensis (Nakai) Kitam, Astereae). Greatest chromosome variation is found in tribe Astereae (2n=18-144). Inculeae and Senecioneae exhibit only ploidy in several levels although most tribes demonstrate multiple levels of ploidy associated with aneuploidy as well. Herbaceous Cardueae species have only diploids and aneuploids. Somatic chromosome number variations are strengthened in herbaceous perennials, correlating with high species diversity. In this study, we report somatic chromosome numbers of Asteraceae in Korea including fourteen new counts and discuss their taxonomic, phylogenetic significance to understand floristic diversity of the family in the Korean peninsula.


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1 - Andong National University, Medicinal Plants Resources, 1375 Gyeongdong-ro, Andong, Gyeongbuk, 760-749, Korea
2 - Chungbuk National University, Biology, 52 Naesudong-ro, Heungdeok-gu, Cheongju, Chungbuk, 361-763, Korea
3 - Jungwon University, Medicinal Plant Science, 85 Munmu-ro Goesan-eup, Goesangun, Chungbuk, 367-700, Korea
4 - Korea National Arboretum, Division of Forest Biodiversity, 415 Kwangreung Soomokwon-ro, Soheul-eup, Pocheon, Gyeonggi-do, 487-821, Korea

Keywords:
chromosome number
cytotaxonomy
polyploidy
Asteraceae
Korean flora.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PSY049
Abstract ID:882
Candidate for Awards:None


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