ESTIMATINON GENOTYPIC PHENOTYPIC VARIANCES FOR BARLEY GENOTYPES

Abstract

Twenty four genotype of barley were used in addition to the local variety (black barley), according to random complete block design (R.C.B.D.) with three replications under the rainfed conditions of northern area of Iraq. The characters were studied. These characters are namely: Number of days to 50% anthesis, plant height, spike length, number of grains/spike, 1000-grain weight, number of spikes/m2, biological yield, grain yield, harvest index and. Genotypic and phenotypic variances were highly significant for all the characters. Broad-sense heritability value was high for plant height, number of spikes/m2, number of grains/spike and biological yield and moderate for Number of days to 50% anthesis, spike length, grain yield, harvest index and 1000-grain weight. The expected genetic advance values were low for Number of days to 50% anthesis, Medium for plant height, spike length, grain yield and 1000-grain weight, high for number of spikes/m2, number of grains/spike, biological yield and harvest index, The coefficient to phenotypic and genotypic was low for number of days to 50% and thesis and plant height while moderate for spike length, number of grains/spike, number of spikes/m2, biological yield, grain yield, and 1000-grain weight and high for harvest index.