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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 3
First page : (443) Last page : (447)
Article doi: :

Gamma Rays Induced Mutation Studies in Marigold Cv. Double Orange in M1 Generation

Latha S.* and P. R. Dharmatti

Department of Horticulture
University of Agriculture Science, Dharwad-580005, Karnataka, India
*Corresponding Author E-mail:
Received: 4.08.2017 | Revised: 15.09.2017 | Accepted: 23.09.2017  



The present investigation was carried out in UAS, Dharwad. Seeds of marigold cv. Double Orange were irradiated with 0, 100, 200, 300, 400, 500 and 600 Grays of gamma rays to induce mutation. Seeds were sown just after irradiation and 30-days old seedlings were transplanted. Reduction in germination percentage, survival percentage, plant height and number of leaves with increase in dose of gamma rays, where as lethality was found increased with increasing doses of gamma rays. In flower characters like flower diameter and number of petals per flower was significantly increased at 600 Gy. While, number of flowers per plant and flower yield per plant was reduced with increase in dose of gamma rays. The maximum frequency of chlorophyll mutants (xantha, chlorina, viridis and albina) and morphological mutants were observed in higher doses (500 and 600 Gray) of gamma rays. Stimulating effect of gamma irradiation on flower characters was observed at 500 and 600 Gray.

Key words: Gamma rays, Mutation, Gray, Irradiation, Lethality.

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Cite this article: Latha, S. and Dharmatti, P.R., Gamma Rays Induced Mutation Studies in Marigold Cv. Double Orange in M1 Generation, Int. J. Pure App. Biosci.6(3): 443-447 (2018). doi: