Estimation of Some Genetic Parameter and Correlation at Several Genotypes of Bread Wheat (Triticum Aestivum L.) under the Effect of Levels of Spraying with Ascorbic Acid

This study was performed to estimation the genetic parameters and path analysis of the quantitative traits in bread wheat (Triticum aestivum L.) under the influence of spraying with ascorbic acid. The field experiment was carried out during the winter season (2019-2020) at the Agricultural Research and Experiments Station of the College of Agriculture at the University of Kirkuk. The split plot design was used, according to complete Randomized Complete Block Design (R.C.B.D) with three replications. Main plots included levels of foliar spray with ascorbic acid using three levels (0, 100 and 200) (mlg. L-1), while the sub-plots included (16) genotypes of bread wheat The study results can be summarized as follows: The values of the variances and the phenotypic and genetic difference coefficients ranged between low and medium for all traits, so in the three spray levels (0, 100 and 200) mlg.L-1.The expected genetic improvement values were found as a percentage of the general average of the studied traits and under three levels of spraying with ascorbic acid (0, 100 and 200), as it is noticed that the values were high for all the studie studied traits and for all levels.The genetic and phenotypic correlation under three levels of spraying with ascorbic acid (0, 100 and 200) was positive and significant between grain yield and each of the biological yield in kg. ha -1, the number of total tillers ( tiller.m-2 ), the number of spikes (m2) and the harvest index% at the spraying level (0 and 100) and the weight of 1000 grains at the level (0 and 200), while the ecological correlation was positive and significant between the grain yield and each of the physiological maturity at the level (0), plant height at the level (100) and the number of grains at level(200).

Anahtar Kelimeler: Bread Wheat, Triticum Aestivum L., Ascorbic Acid

This study was performed to estimation the genetic parameters and path analysis of the quantitative traits in bread wheat (Triticum aestivum L.) under the influence of spraying with ascorbic acid. The field experiment was carried out during the winter season (2019-2020) at the Agricultural Research and Experiments Station of the College of Agriculture at the University of Kirkuk. The split plot design was used, according to complete Randomized Complete Block Design (R.C.B.D) with three replications. Main plots included levels of foliar spray with ascorbic acid using three levels (0, 100 and 200) (mlg. L-1), while the sub-plots included (16) genotypes of bread wheat The study results can be summarized as follows: The values of the variances and the phenotypic and genetic difference coefficients ranged between low and medium for all traits, so in the three spray levels (0, 100 and 200) mlg.L-1.The expected genetic improvement values were found as a percentage of the general average of the studied traits and under three levels of spraying with ascorbic acid (0, 100 and 200), as it is noticed that the values were high for all the studie studied traits and for all levels.The genetic and phenotypic correlation under three levels of spraying with ascorbic acid (0, 100 and 200) was positive and significant between grain yield and each of the biological yield in kg. ha -1, the number of total tillers ( tiller.m-2 ), the number of spikes (m2) and the harvest index% at the spraying level (0 and 100) and the weight of 1000 grains at the level (0 and 200), while the ecological correlation was positive and significant between the grain yield and each of the physiological maturity at the level (0), plant height at the level (100) and the number of grains at level(200).

Keywords: Bread Wheat, Triticum Aestivum L., Ascorbic Acid