Response of Yield, Yield Components and Seed Quality of Some Rapeseed Genotypes (Brassica napus L.) to Plant Density under Rainfed Conditions

This study was conducted at the Sheikh Mohamed location which is far about (25 km) west north Mosul city during [2009][2010][2010][2011] seasons.Three rapeseed genotypes (Tantal, Kroko and Rapol), were tested under three plant density (29629, 44444 and 88888 plants.hectar -1 ) to determine the effect of plant density on the rapeseed (Brassica napus L.) seed yield, yield components and seed quality.The results showed that plant density of 29629 plants.hectar -1 gave the highest mean for characters stem diameter, number of primary branches, number of silique per plant, leaf area, number of seed per silique, weight of thousand seed, and oil, protein percentage in 2009-2010, 2010-2011 seasons, While the plant density of 88888 plants.hectar -1 gave a high mean for plant height in both growing seasons.The genotypes differed significantly in all the related characteristics, the Kroko genotype come over the other genotypes in plant height, stem diameter, number of branches/plant, leaf area, number of silique /plant, number of seed/ silique, 1000 seeds weight (g.) seed yield (ton.ha -1 ), oil, protein percentage of seeds and oil, protein yield (ton.ha -1 )in both growing seasons.The interaction between plant density and genotypes was significant in plant height in 2009-2010 season only, the Kroko genotype with plant density at 88888 plants.hectar-1 gave highest mean for plant height.