Phenotypic and genetic variability, heritability and genetic advance for quantitative traits of two-rowed spring barley in Forest-steppe of Ukraine

Abstract

The paper covers the results of three-year (2012–2014) studies by statistical genetic parameters of the main economically important quantitative traits in two-rowed spring barley accessions of different ecological origin under environments of the V.M. Remeslo Myronivka Institute of Wheat of NAAS. Phenotypic (PCV) and genotypic (GCV) coefficients of variation were from low to moderate level depending on the trait and year of the study: PCV = 3.69–17.22%, GCV = 3.66–14.73%. The highest values for all years were noted for the grain weight per plant: PCV = 14.32–17.22%, GCV = 12.01–14.73%, the lowest values were noted for 1000 grain weight: PCV = 3.69–5.96%, GCV = 3.66–5.93%. Heritability coefficient in the broad sense varied from H2 = 70.34% for the grain weight per plant to H2 = 98.94% for 1000 grain weight. The highest indices of expected genetic advance as percent of mean (GAM) was noted for the main spike length: GAM = 24.82–26.92%, for grain weight per plant: GAM = 20.74–25.95%, for grain weight per main spike: GAM = 18.87–23.81%. The peculiarity revealed indicated that when reasonable selecting the components of crosses, it is possible to obtain breeding advance of moderate to high level for most traits.