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Advances in Agriculture
Volume 2017, Article ID 2385106, 7 pages
https://doi.org/10.1155/2017/2385106
Research Article

Effects of Gamma Irradiation on Agromorphological Characteristics of Okra (Abelmoschus esculentus L. Moench.)

1Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
2Department of Crop Sciences, School of Agriculture, University of Cape Coast, Cape Coast, Ghana
3Biotechnology and Nuclear Agricultural Research Institute, Ghana Atomic Energy Commission (GAEC), P.O. Box LG80, Legon, Accra, Ghana

Correspondence should be addressed to Aaron Tettey Asare; hg.ude.ccu@erasaa

Received 25 April 2017; Accepted 5 July 2017; Published 3 August 2017

Academic Editor: Othmane Merah

Copyright © 2017 Aaron Tettey Asare et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cultivation of okra in Ghana is challenged by low yield due to lack of improved varieties. Gamma irradiated okra seeds can generate genetic variability to improve the crop. Samples of 150 seeds, each of okra genotype, UCCC6, were irradiated with 400 Gy to 1000 Gy using cobalt 60 source at a dose rate exposure of 121.58 Gy/hr. There were 40 stands comprising single plant per stand in three replications per treatment in a randomized complete block design outlay. Seedling survival, plant height, number of leaves, stem diameter, number of branches, leaf length and width, days to 50% flowering, number of fruits, length and weight of fruit, number of seeds, and 100-seed weight decreased significantly () with increasing doses of gamma rays. Seedling survival was highest (88%) at 400 Gy, followed by control (81%). However, 600 Gy, 800 Gy, and 1000 Gy had 61%, 41%, and 17% seedling survival, respectively, with LD50 at 720 Gy. Significant () correlations existed between growth and yield components. Optimum growth and yield in okra were induced by 400 Gy but the higher doses had growth retardation effects and the induced variability can be assessed at M2 generation.