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KMID : 1098420080160040238
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Korean Journal of Medicinal Crop Science
2008 Volume.16 No. 4 p.238 ~ p.241
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Effect of Gamma Irradiation on the Germination and Growth of Astragalus membranaceus
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Kim Dong-Hwi
Park Hee-Woon
Park Chun-Geun
Sung Jung-Sook
Seong Nak-Sul
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Abstract
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Astragalus membranaceus have used as a medicinal herb and food in Korea. It is limited its harvest by diseases, pests and climate, therefore the main objective of Astragalus membranaceus breeding is the development of varities with the resistance for them. We used mutation breeding to obtain the genetic resources with the resistance for them. Pocheon, the local variety of Astragalus membranaceus, was treated with different levels Y-ray of Gy. There were investigated the sensitivity on germination and survival rate, plant height and the other characters. Germination rate from 4th day after sowing was significantly decreased above the 300 Gy as compared to the control. Compared to control, the decrements of survival rate were 32, 43, 63, 72, 84 and 89% for 100, 200, 300, 400, 500 and 600 Gy, respectively. The sensitive characters to Y-ray were plant height, number of branches per plant and survival rate, and the insensitive characters were number of leaves, length of leaf, and width of leaf. Plant height, number of branches per plant and survival rate seemed to be appropriate characters to decide the radiosensitivity, and radiation doses of Gy () were recommend for mutation breeding.
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KEYWORD
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Astragalus membranaceus, Y-ray, Mutation, Germination, Survival rate, Growth
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