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Morphological and genetic differences between Korean Sugwawon No. 301 and Chinese Huangguan No. 1 strains of Saccharina japonica (Phaeophyceae) in a Korean aquaculture farm

Abstract

We compared the cultivation performance and genetic characteristics of Korean (Sugwawon No. 301) and Chinese strains (Huangguan No. 1) of the brown alga Saccharina japonica at an aquaculture farm in Korea. The number of cortical layer cells and the area of the cortical cells were measured for different size groups (5, 15, 30, 50, 100, 150 cm) of the two strains in a Korean culture farm from January to June 2018. We found better performance of the Sugwawon No. 301 strain in Korean waters, possibly due to increased flexibility as a result of the different cell arrangement of the two strains. The differences in cell shape (spherical or rectangular) and arrangement (irregular or constant layered) of the two strains began to appear at lengths of 50 cm where the Sugwawon No. 301 strain had greater numbers of smaller cells than Huangguan No. 1. In addition we established six sequence simple repeats (SSR) genetic markers that clearly distinguish these two strains of S. japonica. Based on our observations, we speculate that differences in the cell arrangement between strains of S. japonica were determined by genetic variation and morphological properties of the two kelp strains.

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Acknowledgments

The authors thank Won Je Choi and Yeong Ha Kim for the technical assistance for the SSR marker development.

Funding information

This work was supported by a grant from the National Institute of Fisheries Science (R2020008, P2019028) and the Collaborative Genome Program of the Korea Institute of Marine Science and Technology Promotion (KIMST) funded by the Ministry of Oceans and Fisheries (MOF) (20180430).

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Correspondence to Chan Sun Park.

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Hwang, E.K., Choi, J.W., Yoon, H.S. et al. Morphological and genetic differences between Korean Sugwawon No. 301 and Chinese Huangguan No. 1 strains of Saccharina japonica (Phaeophyceae) in a Korean aquaculture farm. J Appl Phycol (2020). https://doi.org/10.1007/s10811-019-02029-8

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Keywords

  • Saccharina japonica
  • Phaeophyceae
  • Cell shape and arrangement
  • Genetic difference