katoul, a new soybean cultivar for cultivation in golestan province, iran

katoul is a new soybeam cultivar originated from a genotype named d.p.x.3589 imported from the united states of american in 1990. this genotype was examined together with other soybean genotypes and check cultivars in different preliminary and advanced yield traits in gorgan and other research stations during 1999-2002. the mean seed yield of d.p.x.3589 in all these experiments was 3333 kgha-1 which was 748 kgha-1 higher than the yield of check cultivar gorgan 3. in farmer`s fields it also produced 3397 kgha-1 seed yield, 839 kgha-1 more than the check cultivar. in experimental trials and farmer`s fields, d.p.x.3589 was relatively resistant to charcoal rot disease and soybean cyst nematode. this genotype shows a good standing for lodging and shattering and is suitable for mechanized harvesting due to poding in higher nodes of stem and also homogeneity of plants at harvesting time. the other feature of this genotype is a high rate of compensatory in environmental stresses with producing further flowers. d.p.x.3589 was officially registered in iran by the national cultivar release committee of agricultural research, education and extension organization in october 2010 and named katoul, for cultivation in golestan province of iran.