Study of Genetic Variability and Traits Correlations in Some Barley (Hordeum vulgare L.) Genotypes under Wet and Dry Conditions in Syria

Abdullatef Ahmad Al-Assaf*(1) Mohammad Shafik Hakim(2) Mohammad Fadi Basmaji(1) and Stefania Grando(3)

(1).  Aleppo Agricultural Research Center, General Commission of Scientific Agricultural Research GCSAR, Damascus, Syria.

(2). Department of Field Crops, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(3). International Center of Agricultural Research in Dry Area (ICARDA), Aleppo Syria.

(*Corresponding author: Eng: Abdullatef Ahmad Al-Assaf. E-Mail:

Received: 14/10/2018                                Accepted: 29/11/2018


Experiment was conducted out at Tal Hadya and Houmeimeh Stations in Aleppo Research Center, General Commission for Scientific Agricultural Researche (GCSAR) during 2008/2009 and 2009/2010 seasons. Forty-three barley genotypes were used with three replications under RCBD design. The aim of search was to study phenotypic, genetic and ecological variability, with heritability, genetic and phenotypic correlations. Genotypes were evaluated for: plant height, spike length, grain number per spike, thousand kernel weight and grain yield, besides some root traits. The results showed a large variability through studied traits. The genetic and phenotypic variances were larger than ecological variance for most traits. The highest value for heritability was 91.12% for plant high. Under dry conditions, plant growth was significantly decreased as measured by all characters. The percentage of reduction, ranging from 66.96 % to 1.90 % was recorded on grain yield and kernel weight, respectively. The injury index ranging from 2,03 to 0.02 was recorded on grain yield and kernel weight, respectively. The correlation coefficients among characters were nearly the same in the wet and dry experiments. Positive and highly significant correlation (r=0.95**) was found between the percentage of reduction and injury index. Using GGE Biplot the genotypes were arranged in three, clearly separated groups that varied in their tolerance to drought stress. The genotypes: 4, 17, 16, 18 and 28 were tolerant to drought stress.

Key words: Barley, Genotypic variation, Genotypic correlation, Injury index, Drought tolerance.

Full paper in Arabic: PDF