B. Dyulgerova*, N. Dyulgerov, M. Dimitrova-Doneva
Institute of Agriculture, 8400 Karnobat, Bulgaria
Abstract. A total of 23 varieties of 2-rowed spring barley were grown in two successive seasons of 2011 and 2012 to study variability, heritability and genetic advance for 5 characters – spike length, spikelet number per spike, grain number per spike, grain weight per spike and 1000 grains weight. Significant differences were observed among the varieties regarding all the traits studied. Genotypic and phenotypic coefficients of variability were higher in 1000 grains weight than other traits. Estimates of heritability ranged from 66.62% for grain number per spike to 89.35% for 1000 grains weight. Heritability coupled with high genetic advance was observed for 1000 grains weight and spikelet number per spike indicating the importance of these traits in selection and crop improvement.