The present investigation was conducted during 2010/2011 and 2011/2012
growing seasons at Karahta station for field crops research, General
Commission for Scientific Agricultural Researches (G.C.S.A.R.), Syria. Forty
five hybrids F1 produced using
a half diallel cross among ten bread wheat
(Triticum aestivum L.) genotypes, in 2010/2011 season, were evaluated during
2011/2012 season in order to study som of the genetic parameters for grain
yield per plant, its components, some morphophysiological and quality traits to
determine the basic criteria for selection.
A half diallel set of crosses among six highly diverse barley (Hordeum
vulgare L.) genotypes were evaluated at Karahta Research Station, General
Commission of Scientific Agricultural Research (GCSAR), during 2010-2011
and 2011-2012 seasons to stud
y heterosis, potence ratio, correlations among
traits and path coefficient analysis for number of spikes per plant, number of
grains per plant, number of grains per spike, biological yield ,and grain yield
per plant. Heterosis effects for seed yield ranged from%-89.52 (T-6669×S-6303)
to%16.99 (Arabi abiad mohsan×S-6689) and from%-49.94 (L-6711×S-6689)
to %-1. 35 (Arabi abiad mohsan×S-6689) relative to mid and better parents
respectively. Potence ratio values ranged from 1.14 (number of spikes per
plant) to 3.50 (biological weight) indicating that non-additive gene action was
more important in controlling all studied traits. Correlation coefficients among
traits indicated that seed yield was positively and significantly associated with
each of number of spikes per plant (0.289), number of grains per plant (0.832),
number of grains per spike (0.587), and biological yield (0.708) traits. Path
coefficient analysis indicated that number of grains per plant trait had high
positive direct effects on grain yield.
The experiment was carried out at two planting dates in a Randomized
Complete Blocks Design with three replications at Maize Research Department,
General Commission for Scientific Agriculture Researches (G.C.S.A.R.)
Damascus, Syria, during two cro
pping season 2011 and 2012 to study the
phenotypic and genotypic coefficients of variation, heritability, genetic advance,
phenotypic correlation and path coefficient analysis for grain yield per plant,
its components and the height of plant and ear of two maize hybrids (IL.292-06
× IL.565-06, IL.459-06 × IL.362-06).
