Development of a Stem-color Mutant Kenaf (Hibiscus cannabinus L.) Cultivar, 'Jeokbong', and Analysis of its Functional Compounds
2018
Ryu, J., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Kwon, S.J., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Ahn, J.W., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Kim, S.H., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Lee, S.Y., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Kim, J.B., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Jo, Y.D., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea | Ha, B.K., Chonnam National University, Gwangju, Republic of Korea | Kang, S.Y., Korea Atomic Energy Research Institute, Jeongup, Republic of Korea
A new cultivar, 'Jeokbong', was developed from kenaf cultivar 'C14' by gamma-ray (300 Gy) irradiation. 'Jeokbong' has several characteristics that distinguish it from its original cultivar, such as stem color (dark purple), leaf color (green purple), and its leaf shape. The flowering date was approximately 70 days after sowing, which was similar to that of the original cultivar. The dry matter yield of 'Jeokbong' was 14.8 ton·ha-1, which was also similar to that of the original cultivar. The anthocyanin composition of stem bark of 'Jeokbong' and three different kenaf cultivars ('C14', 'Jangdae', and 'Hongma300') were determined by HPLC-MS. A single pigment corresponding to delphinidin-3-O-sambubioside was identified in 'Jeokbong', but was not detected in 'C14', 'Jangdae', or 'Hongma300'. The antioxidant and angiotensin converting enzyme inhibitory activity of 'Jeokbong' was approximately 4 times higher compared to the three other cultivars. The crude protein content of 'Jeokbong', 'C14', 'Jangdae', and 'Hongma300' were 9.2, 8.9, 10.5, and 10.6%, respectively. The crude fiber, neutral detergent fiber, and acid detergent fiber contents were not significantly different among the cultivars. These results suggest that 'Jeokbong' contains high levels of functional compounds and has unique ornamental value, and may be useful as a potential source of feed and as a landscape crop.
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