Variation of glucosinolates in vegetable crops of Brassica rapa L. ssp. pekinensis |
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Authors: | Jae Kwang Kim Sang Mi Chu Sun Ju Kim Dong Jin Lee Si Young Lee Sun Hyung Lim Sun-Hwa Ha Soon Jong Kweon Hyun Suk Cho |
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Affiliation: | aNational Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea;bNational Institute of Horticultural and Herb Science, Rural Development Administration, Eumseong 369-873, Republic of Korea;cCollege of Bio-resources Science, Dankook University, Cheonan 330-714, Republic of Korea |
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Abstract: | Glucosinolates of Chinese cabbage (Brassica rapa L. ssp. pekinensis) from Korea were characterised to determine the total glucosinolate content and the diversity amongst glucosinolates; 24 varieties were analysed. The profiles of 14 glucosinolates identified from the leaves were subjected to principal component analysis (PCA) to evaluate the differences among varieties. The Kori, Sandun and e-Norang varieties separated from the others based on glucosinolate concentration. Genetically modified Chinese cabbage containing the bar gene could not be separated from non-genetically modified varieties. Glucobrassicanapin, 4-methoxyglucobrassicin, gluconapin and glucobrassicin in Chinese cabbage were confirmed as the main glucosinolate compounds. The Kori, Sandun and e-Norang varieties appear to be good candidates for future breeding programmes since they have a high glucosinolate content. The presence of indolic glucosinolates in all varieties should be studied more extensively because they are the precursor of indole-3-carbinol, a potent cancer chemopreventive agent. |
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Keywords: | Brassica rapa L. ssp. pekinensis Chinese cabbage Glucosinolate Principal component analysis Substantial equivalence |
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