Planting date effect on yield, seed yield, growth index and phonologic traits canola (Brassica napus L.) Genotypes in Ahvaz condition

Determine the most suitable genotype and planting date for Canola, an experiment based on a split plot in randomized complete block design with three replications was conducted during Farm 2005-2006. Four planting dates, 15 and 30 November, 15 and 30 November in the main plots and four genotypes (Hyola401, PP401, R.G.S.003, Option 500) in the subplots were studied. Analysis of variance showed that grain yield, yield components and total dry matter were significantly affected were planting date. Planting date of November 15 was superior characteristics. Genotypes studied also in terms of yield and its components and other traits, significant differences were noted. The highest and lowest yield hybrid Hyola401 respectively with 2.61 tons per hectare and with genotype Option500 1.51 ha belonged. First planting date of all physiological parameters studied compared to other planting date was best. Hybrid Hyola401 due to being more leaf area index (3.51), total dry matter (1249 g/m2), CGR (21 g/m2.day1), NAR (7 g/m2 day1) and RGR (0.064 g/g1.day1) the highest yield (2805 kg/ha1), respectively. The results of this study Hyola401 hybrid planting in semi-November planting date is recommended for the Ahvaz region.