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http://dx.doi.org/10.11626/KJEB.2019.37.4.707

Morphological comparison between aquaculture and natural populations for development of the new varieties of Ecklonia cava  

Kim, Seung-Oh (Aquatic Plant Variety Center, National Institute of Fisheries Science)
Heo, Jin Seok (Aquatic Plant Variety Center, National Institute of Fisheries Science)
Hwang, Eun Kyoung (Aquatic Plant Variety Center, National Institute of Fisheries Science)
Hwang, Mi Sook (Seaweed Research Center, National Institute of Fisheries Science)
Lee, Sang-Rae (Marine Research Institute, Pusan National University)
Oak, Jung Hyun (Marine Research Institute, Pusan National University)
Publication Information
Korean Journal of Environmental Biology / v.37, no.4, 2019 , pp. 707-718 More about this Journal
Abstract
Ecklonia cava Kjellman, which has recently gained popularity due to the spread of farming techniques, is expected to be developed in various varieties in the future. There exist increased needs for research on the basis of natural populations and inter-regional morphological variations. We compared the morphology of the aquaculture and natural populations from 16 coastal areas in Korea. The 18 traits found suitable for distinguishing varieties were selected from 14 measurement traits and 4 ratios related to the main morphology and characteristics of primary blade, secondary blade, and stipe. In the cluster analysis, Janggil (E4) and Sorok (S7) showed significant differences from those of the same coastal region. Two groups, including Suyou (Q6, Q8, and Q10) which was the second year of farming, of the rest of the populations from East sea and southern coast were distinguished. Three populations of Jeju were divided into a regional group. In the principal component analysis (PCA), a large number of populations from East sea and Southern coast appeared in the center with aquaculture populations. PC1 and PC2 associated with traits of secondary blade index, stipe length and diameter, stipe length/primary blade length, primary blade length and width, secondary blade number, secondary blade length and width, divided E4, S7 and populations of Jeju region. As a result, the 18 characters of this study were found to be useful as criteria for discrimination of populations with significant differences in each coastal region, and these populations were expected to be candidates for new varieties.
Keywords
Ecklonia cava; morphological comparison; cluster analysis; principal component analysis;
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