Abstract:
This experiments of this Research were conducted to study effect of the gamma
irradiation doses on four genotypes of maize (Zea mays L.) (Var-113, Hudiba-1,
Hudiba-2 mug45). The maize genotypes were subjected to four doses (50, 100,
150 and 200GY) of gamma irradiation including control. One laboratory and
two field experiments were conducted. The laboratory experiment was
conducted to study the germination percentage, shoot, root and shoot to root
ratios of the germinated seedling. The results of the laboratory experiments
revealed that the growth of the four genotypes was decreased with increasing of
gamma irradiation doses. The field experiments were conducted at two
locations Shambat, College of Agricultural Research studies and Madeni, the
experimental farm of Agricultural Research Corporation. During the summer
season of 2014, the design of the experiment was a Randomized Complete
Block Design (RCBD) with three replications. All the maize treated seeds with
gamma irradiation were used in the field experiments. Different growth and
yield characters were measured. The results revealed the failure of germination
of all treated seed of the four genotypes except (zero and 50GY) doses.
Significant results were obtained between the two doses (zero and 50GY), the
genotypes and their interaction for most of the studied characters. This
significance could be of a great value in any maize breeding program. The
results of this study revealed that the availability of using gamma irradiation in
any maize breeding program in the future.
