Responses of Wheat Genotypes as Affected by Different Sowing Dates

A field experiment was conducted Seed and Plant Improvement Institute, Karaj (Iran) for two seasons, 2007-08 and 2008-09, on farmer’s fields to investigate the effect of two sowing dates; optimum sowing date (1st November) and late sowing date (20th November) on yield and yield components of eight wheat genotypes. The results showed that the optimum sowing produced higher grain and biomass yields, 1000- grain weight, Spike per square meter compared to late sowing. Between grain yield and traits of biological yield, 1000- grain weight and grain per square meter were correlated positively.