ESTIMATION OF VARIANCES, CORRELATIONS AND HERITABILITY FOR SEVERAL NEW GENOTYPES OF BREAD WHEAT IN TWO ENVIRONMETS OF NINEVA GOVERNORATE

Twenty new bread wheat genotypes in addition to the local variety Abo-Graib 3 were evaluated in Nienavah governorate for Al-Rashidia and Rabeeah locations. The characters studied were: number of days to flowering, plant height, spike length, number of spikelets/spike, number of grains/spike, number of spikes/m2, yield and biomass yield, harvest index, 1000 grain weight and protein percentage. The genotypes were significantly different for all the characters except for the number of spikelets/spike. Phenotypic and genetic variances were significant for all the characters. Genetic correlation was significant between grain yield and harvest index for both locations. Broad-sense hertability estimates were high for protein percentage and low for plant height, grain yield, biological yield, harvest index and 1000 grain yield for both locations.