Tag Archives: Genotypic correlation

Genotypic and Phenotypic Correlation and Path Coefficient ‎Analysis for Grain Yield and its Components in Some ‎Sweetcorn (Zea mays L. saccharata) Genotypes

Mohamed Nael Khattab*(1)

(1). Crops Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(*Corresponding author: Dr. Mohamed Nael Khattab. E-Mail: aboalabd876@gmail.com).

Received: 21/05/2019                               Accepted: 06/09/2019

Abstract

A field experiment was conducted at Dmsrkho region, Latakia governorate, Syria, during two seasons 2017 and 2018.  Six genotypes of maize Zea mays L. saccharat were used in this study, i.e: Temptation,Target-A, Sucaria-1 and Sucaria-7- Merritt (USA), and (Faihaa) to study of the  genotypic and phenotypic correlation and path analysis  of yield and its components (number of grains per row, number of rows per ear, 100 kernel weight, ear length, ear circumference), to determine the most common traits of yield and to determine the appropriate selection criteria evidence to improve Sweetcorn. The study showed that the genotypic correlations were higher in most studied traits. The study of genetic correlations were significant and positive in most traits, especially between the fresh yield of the plant with the plant height (rg=0.57**), ear height (rg=0.53**), ear length (rg=0.69**(, ear circumference (rg= 0.83**), number of rows in per ear (rg=0.34**), number of grains per row (rg= 0.72**) and 100 kernel weight )rg=0.66**.( The results showed a high direct effect of the number of grains per row )Genotypic 0.55 and phenotypic 0.53), 100 kernel weight (Genotypic 0.563 and phenotypic 0.451), number of rows per ear  (Genotypic 0.51 and  phenotypic 0.35( and plant height  (Genotypic 0.113 and phenotypic 0.184(, on the individual plant yield because of their strong correlation with it. These traits can therefore be relied as selection criteria to improve grain yield in Sweet corn. The relative importance of the yield variability was (58.67%) because of the fifth aforementioned traits, while the other effects on yield were (41.33%). These five traits are the most important traits that affect the variation in yield in this study

Key words: Sweet corn, Genotypic correlation, phenotypic correlation, genotypic path coefficient, phenotypic path coefficient.

Full paper in Arabic: PDF

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: a.alassaf74@gmail.com).

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

Abstract

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

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: a.alassaf74@gmail.com).

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

Abstract

The experiment was conducted at Tal Hadya and Houmeimeh Agricultural 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 the research was to study the phenotypic, genetic and environmental variability, heritability, genetic and phenotypic correlations. Genotypes were evaluated for plant height, spike length, grain number per spike, thousand grains weight and grain yield, besides some root traits. The results showed a large variability within studied traits. The genetic and phenotypic variances were larger than environmental variance for most traits. The highest value of heritability was 91.12% for plant high. Under dry conditions, plant growth was significantly decreased as measured by all characters. The percentages of reduction, ranged from 66.96 % to 1.90 % for grain yield and grain weight, respectively. The injury index ranged from 2,03 to 0.02 for grain yield and grain weight, respectively. The correlation coefficients among characters were nearly the same in the wet and dry locations. 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 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