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Effect of Gamma Irradiation on the Germination and Growth of Astragalus membranaceus  

Kim, Dong-Hwi (National Institute of Crop Science, RDA)
Park, Hee-Woon (National Institute of Crop Science, RDA)
Park, Chun-Geun (National Institute of Crop Science, RDA)
Sung, Jung-Sook (National Institute of Crop Science, RDA)
Seong, Nak-Sul (National Institute of Crop Science, RDA)
Publication Information
Korean Journal of Medicinal Crop Science / v.16, no.4, 2008 , pp. 238-241 More about this Journal
Abstract
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 $100{\sim}600$ 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 $200{\sim}300$ Gy ($LD_{50}$) were recommend for mutation breeding.
Keywords
Astragalus membranaceus; Y-ray; Mutation; Germination; Survival rate; Growth;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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