A half-diallel set of crosses involving nine white early inbred lines of maize
were evaluated at the two locations Sakha and Sids. The objectives were to estimates
the type and relative amount of genetic variance components and their interaction with
the environment for tasseling date, ear position, late wilt resistance, number of
ears/100 plant, 100-kernels weight and grain yield/plant. Genetically analyzed by the
procedures developed by Griffing (1956) method-2 model-1 . Mean squares of locations (L) were significant for all studied traits. The
significance of genotypes and their partitions parents (P), crosses (C) and P vs C
(heterosis) were detected for all studied traits except ( P vs C) for ear position. The
mean squares of interaction between genotypes and their partitions with locations
were significant for all studied traits except C x Land P vs C x L for 100-kernel weight.
Both additive and non-additive genetic effects were controlling the genetic system for
all studied traits. The additive genetic effects played an important role in the
expression of all studied traits except grain yield/plant. The interaction between GCA
and SCA with location were significant for ali studied traits except SCA x location for
100-kernel weight. The parental inbred lines Sd-62E and Sk-6056 seemed to be the best
combiner for grain yield/plant. Sk-6054 and Sk-4051 were the best for earliness. Sd-
62E and SO-7E were the first comber for late wilt resistance.The highest desirable
SCA effects were detected in the crosses; (Sd-7E x Sk-4051), (Sd-7E x Sd-34E), (Sk-
34E x Sk-4054), (Sk-4051 x Sk-6056), (Sd-62E x Sk-4054) and (Sd-34E x Sk-6056)
for grain yield/plant and most studied traits.