Evaluation of some agro-morphological traits diversity inIranian bread wheat genotypes

Variation of traits is a primary need of any plant breeding effort that involves the naturalevolution and causes sustainable crop production under different environments. Fifty six breadwheat genotypes grown during the growing season of 2012/2013 were evaluated for variabilitycharacteristics for eighteen traits i.e., stem diameter, plant height, leaf number, leaf length, leafwidth, tiller number, internode length, peduncle length, spike length, floret number, spikelet number,grain number, awn length, grain diameter, grain length, number of days to flowering, thousand seedweight and grain yield. Significant differences were observed for all the traits studied, indicatinga considerable amount of variation among wheat genotypes for each trait. The estimates of thecoefficient of variation (CV) were high for grain yield and number of tillers per plant. Spike lengthvaried from 8.95 in G28 to 4.74 in G40, while genotype G20 had the maximum floret number (19).According to thousand seed weight, genotype G55 had the maximum thousand seed weight (45.57g) and genotype G4 had the maximum grain yield performance (6936.3 kg ha^-1). The information ondiversity among the agro-morphological traits of the studied wheat genotypes will be helpful to plantbreeders in constructing their breeding materials and implementing selection strategies.