Heterosis, potence ratio, phenotypic correlation and path coefficient analysis for grain yield and it's components in barley (Hordeumvulgare L. )

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 study 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.

Heritability, genetic advance, phenotypic correlation and path coefficient analysis for some quantitative traits in two hybrids of maize (Zea mays L.)

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 cropping 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).

Variability, correlation and path coefficient analysis of some yield traits in hybrids of durum wheat (Triticum durum L.)

This study was carried out at Karahta Station of Field Crop Research, General Commission of Agricultural Scientific Researches during 2010-2011 and 2011-2012 cropping seasons in order to determine the phenotypic correlation coefficient between the traits and the path coefficients analysis for the most affected traits in grain yield.

Evaluation of some inbred lines of yellow maize (Zea mays L.) using top-cross method under different environments

Forty-six inbred lines of yellow maize (zea mays L) crossed apically with Al Ghouta variety No. 82 during 2008 growing season at Dir Ala, Dead Sea.

Prediction of combining ability in some maize (Zea mays L.) inbred lines using top-cross method under different environments

This research was carried out to evaluate the combining ability of twentyfive inbred lines of yellow maize and estimate the phenotypic correlation and path analysis of twenty-five top crosses were formed during 2009 growing season at Dir Ala, Dead Sea. Jordan. Their plants were evaluated in Syria during 2009 growing season in three locations (Al Raka, Aleppo and Dir Al- Zor).

Path Coefficient Analysis and Relative Importance of Some Fodder Yield Components in Pearl millet [Pennisetum glaucum (L.) R. Br.]

This study was carried out at Kharabu Station, General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons 2011 and 2012, to estimate phenotypic correlation, and path coefficient of some morphological and green fodder yield components (days to flowering, plant height (cm), number of leaves per plant, number of tillers per plant, and green fodder yield (ton/ha)). Fifteen pearl millet crosses resulted from half diallel mating system between six inbred lines. The experiment was arranged in a randomized complete block design (RCBD), with three replications.