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

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 ( ≤ 0.05) 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 LD 50 at 720 Gy. Significant ( ≤ 0.05) 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 M 2 generation.

Evaluation of SSR and important agronomical characters of promising mutant lines of soybean

“…Based on the yield stability in various environments supported by agronomic characters (number of pods and seeds yield), two promising mutant lines (Biosoy-8 and Biosoy-11) had a high considerable opportunity to be released as improved high yielding soybean varieties with large seeds. These promising soybean mutant lines resulted in this study are in good agreement with previous reports to prove the strength of gamma irradiation to produce new plant varieties (Asare et al 2017;Harsanti and Yulidar 2019). The study clearly demonstrated that the agronomical traits evaluation and molecular variation of promising mutant lines could assist their identification and maximal utilization in the future.…”

Determination of optimal mutagen dosage and its effects on morpho-agronomic traits in putative mutants of ‘amasya’ apple

“…The median TCSA value of the population was 1.68 cm 2 and 4.18 cm 2 in 2014 and 2015, respectively, whereas TCSA was higher in 'Amasya' in both years (3.56 cm 2 and 5.89 cm 2 in 2014 and 2015, respectively) in comparison to others. Mutagens make plants to grow slowly, leading to a reduction in plant height (MALEK et al, 2014;GANAPATHI et al, 2015;ASARE et al, 2017). In this study, both tree height and TCSA showed marked variations among the mutants.…”

“…There might be numerous factors (such as protein synthesis, leaf gas and water exchange) affected by irradiation, which may lead the reduction in tree height (DATTA et al, 2011;LAGODA, 2012;ALI et al, 2016). Also, cell division and cell elongation stages of plants are affected negatively by irradiation (ASARE et al, 2017).…”

Study on the Effects of Gamma Irradiation on Protocorm-Like Bodies of Dendrobium Hybrid against Fusarium proliferatum and Fusarium oxysporum

“…Gujarat Cumin-4 was obtained while the highest dose (500 Gy) resulted in minimum seed germination (9.52%) (Verma et al 2017). Also, plant height, seedling survival, stem diameter, number of leaves, leaf length, number of branches and leaf width of okra decreased significantly with increasing doses of gamma rays (Asare et al 2017). Furthermore, Singh et al (2013) stated that gamma radiation at a low dose of 25 Gy or lower stimulates, while high dose of 100 Gy and above inhibits plant growth and development of wheat cultivar PBW-343.…”