University of Khartoum

The Effect Of Gamma Irradiation On Growth And Yield Of Okra ( Abelmoschus Esculentus L. Moench)

The Effect Of Gamma Irradiation On Growth And Yield Of Okra ( Abelmoschus Esculentus L. Moench)

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Title: The Effect Of Gamma Irradiation On Growth And Yield Of Okra ( Abelmoschus Esculentus L. Moench)
Author: Abdulrahman, Elyas Mohamed Eisa
Abstract: An experiment was carried out in the Demonstration Farm of the Faculty of Agriculture, Shambat ( lat.15o 40\\\\\\\"N, long.32 o 32\\\\\\\' E and elevation 375m above sea level) to study the effect of irradiation treatments of two okra cultivars on growth and yield components. A split-plot design was used. Seeds of two okra cultivars namely, Regalwizzina and Khartoumia from recently harvested season were irradiated by different doses of gamma rays (100, 150, 200, 250 and 300 Gy) each of 500 seeds. Parameters studied included emergence percentage, seedling survival, number of leaves per plant, plant height, stem diameter, number of days to 50% flowering, flowers and pods number per plant, fertility percentage, pod weight, number of seeds per pod and 100 seed weight. The results showed that cultivars varied significantly in their response to irradiation treatments, as the doses 150, 200 and 250 Gy have a highly significant effect on seedling emergence and survival. On the other hand, the effects of irradiation doses on number of leaves per plant of the two cultivars were not significantly different. However, there was significant difference among the irradiation doses. The low levels of irradiation doses significantly increased the leaf number while the high levels did the reverse. The effects of irradiation doses on plant height of the two cultivars was not significantly different. The irradiation doses on plant height showed no significant difference in the first five weeks from planting, but from the 6th week up to the 9th week, they showed highly significant differences. The results of stem diameter (cm) collected at intervals of 30, 45 and 60 days showed significant difference between the two cultivars. The irradiation dose of 300 Gy was only significantly affected (negatively reduced stem diameter) in 30 and 45 days, whereas after two month no significant differences were recorded. As for the number of days to 50% flowering, there was significant difference between the two cultivars. The treatments as well as their interactions showed highly significant difference. The results of the number of flowers and pods per plant showed no significant difference between the two cultivars at the first two weeks of full blooming, whereas in the subsequent weeks they showed significant difference. On the other hand, the irradiation doses and their interactions showed significant difference in flowers and highly significant difference in pods number. For the number of branches per plant and reproductive branches, the results showed no significant difference between the two cultivars in number of branches/plant, while the number of reproductive branches showed significant difference. However, the irradiation doses as well as their interactions showed highly significant difference. The results of fertility percentage showed no significant difference between the two okra cultivars. However, the irradiation doses as well as their interactions showed highly significant difference.. At the end of the experiment, the results of pod weight (g), number of seed per pod and 100 seed weight (g) showed no significant difference between the two varieties, whereas, the irradiation doses and their interactions showed highly significant difference in their effect on the number of seed per pods and 1000 seed weight.
URI: http://khartoumspace.uofk.edu/handle/123456789/11895
Date: 2015-06-14


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