원예과학기술지 (Horticultural Science & Technology)

  • 제34권2호
  • /
  • Pages.294-304
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  • 2016
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  • 1226-8763(pISSN)
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  • 2465-8588(eISSN)
한국원예학회 (Korean Society of Horticultural Science)
권호 표지
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Genetic Diversity and Phylogenetic Relationships between Chinese Cabbages [B. campestris (syn. rapa) L.] and Cabbages (B. oleracea L.) in Korea

  • Sun, Yan-Lin (School of Life Sciences, Ludong University) ;
  • Zheng, Shi-Lin (School of Life Sciences, Ludong University) ;
  • Park, Kyong-Cheul (Deaprtment of Agricultural Life Science, Kangwon National University) ;
  • Choi, Ki-Young (Deaprtment of Controlled Agriculture, Kangwon National University) ;
  • Kang, Ho-Min (Deaprtment of Horticulture, Kangwon National University) ;
  • Hong, Soon-Kwan (Deaprtment of Bio-Health Technology, Kangwon National University)
  • 투고 : 2015.09.21
  • 심사 : 2016.03.23
  • 발행 : 2016.04.30
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초록

Members of the genus Brassica, which are known as oil crops or cruciferous vegetables, are widely cultivated in Canada, Australia, Asian and Europe. Because Brassica species have high yields, are well adapted to their environments, and are self-incompatible, the germplasm is abundant. Previous studies have reported abundant genetic diversity even within Brassica subspecies. In Korea, fresh cabbage leaves are eaten with roast meat, and to meet the current popular demand, new varieties are being increasingly bred. To determine the genetic diversity and relationships among the cabbage vegetables in Korea, we evaluated the genetic variation of 18 accessions based on 5S and 18S ribosomal RNA (rRNA) gene sequences. We detected many variable nucleotide sites, especially in the 5S rRNA gene sequences. Because the length of the 18S rRNA gene might influence the dissimilarity rate statistics, we used both the 5S and 18S sequences to analyze the phylogenetic relationships. S7 (B. oleracea) showed the most distant phylogenetic relationship with the other Brassica species. Interestingly, B2 (B. oleracea), B15, and B18 (B. campestris) have three different types of leaf profiles, and were divided into one group, and the other Brassica species formed another group. Statistical analysis of interspecies and intraspecies genetic distances revealed that B. campestris L. showed higher genetic diversity than B. oleracea L. This work provides additional data that facilitates the evaluation of the genetic variation and relationships among Brassica species. The results could be used in functional plant breeding programs to improve Brassica crops.

키워드

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