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Study of Delay Cultivation on Seed Yield and Seed Quality of Canola (Brassica Napus L.) Genotypes

Mahdi Bayat

In order to study the effects of delay cultivation on seed yield and germination parameters in canola, an experiment was conducted in Torbat-Jam region during 2010-2011. The experimental design was a split plot arranged in RCBD with three replications. Three sowing dates (6 September, 7 October and 6 November) were assigned to main plots and three canola genotypes (Hyola 401, Zarfam and Mudena) were randomized to subplots. The results of variance analysis about yield components showed genotypes, sowing dates and their interactions had significant effects on all agronomical traits. Also delaying in culture leads to decrease yield components and seed yield subsequently. However, the remarkable point was that genotypes could affect seed yield more than sowing dates; so seed yield, to change genotype from Hyola 401 to Modena, decreased 40%; whereas to change sowing date from 6 September to 6 November, decreased 10%. The results of variance analysis about germination parameters showed that genotypes, sowing dates and their interaction had significant effects on germination parameters. In other hands, sowing dates were more effective on qualification and seed vigor than genotypes. As a conclusion, genotypes and sowing dates affected seed yield and seed quality significantly, therefore, produced seed of cultivated crops in appropriate date will were more vigorous which will increase canopy and growth rate at next year cultivation.