تقويم سلالات و هجنها التبادلية النصفية و الفعل الجيني المسيطر في الصفات الكمية للذرة الصفراء

الملخص EN

Seven inbred lines of maize (Zea mays L.) 1-(Agr183), 2- (ZM47W), 3-(CML494), 4-(IK58), 5-(ZP505), 6-(ZP670) and 7-(ZP197) were put in diallel cross hybridization according to Griffing's second method during autumn season in 2014.

Parents and their diallel cross hybrids were planted in Albosabah village, Tuz district, Salahuddin governorate during spring season in 2015 for an evaluation and study the parents' and their diallel cross hybrids behaviour genetically and phenotypically.

The studied characteristics were number of days to male and female flowering, plant height, number of ears per plant, number of grains per ear, weight of 300 grain and plant yield.

Results of the study showed superiority of parent (3) in plant height, number of ears per plant, 300 grain weight and plant yield.

However, parent (4) showed superiority in number of grains per ear in addition to their influences of general combining ability in all characteristics except 300 grain weight.

The hybrid (1x5) exceeded in number of grains per ear, weight of 300 grain, plant yield.

Furthermore, it had significant impacts for specific combining ability in a desired direction for all studied characteristics except number of ears per plant.

The hybrid (1x6) and (2x7) surpassed in number of ears/plant all characteristics except number of ears per plant and number of grains per ear.

The characteristics were controlled by sovereign gene action, and the uniqueness of the superior hybrids and parents in their means and its influences for specific and general combining ability as well as genetic distance among parents led to a desired gene action for a biggest number of characteristics.

It is possible to conduct experiments for more than one season, location, to evaluate and knowing the stability of the mentioned hybrids to be approved in future.