Resistance to Diseases and Environmental Flexibility of Summer Rapeseed in Trans-Urals

摘要

The studies characterize the resistance and environmental flexibility of summer rapeseed breeds when cultivating in terms of nonfallow predecessors on fertilized and unfertilized ground in forest steppe of Trans-Urals. The following breeds demonstrated complex resistance to fusarial head blight and root rot depending on the watering conditions: Nadyozhniy 92 and SibNIIK 198. The yield of summer rapeseed breeds increased after mineral fertilization: for standard breed by 1.1 q/ha, for other breeds by 2.2-4.6 q/ha. The following breeds belong to the group of widely adaptive without mineral fertilization: Ratnik, Nadyozhniy 92 and SibNIIK 21,while on fertilized ground breeds Nadyozhniy 92 and SibNIIK 21 were characterized as highly environmentally flexible. The yield of crude fat and cake of Ratnik breed amounted to 764.4 and 1217.1 kg/ha, respectively. The yield of fat and cake for other breeds reduced to 575.5 kg and 866.3 kg, correspondingly. The content of erucic acid in the oil of the majority of breeds remained exceptionally low, from 0.10 to 0.13%, while the content of glucos-inolates altered for different breeds from 15.68 to 27.61 μmol/g of oil cake.