通过探究不同油菜品种对菌核病的抗性以及菌核病对陕西关中地区不同油菜品种产量、品质的影响，为油菜生产提供技术支持，本试验对陕西关中地区不同油菜品种成熟期菌核病田间发病率、病情指数进行了调查，并测定了生物量、籽粒产量、含油量、硫苷含量和芥酸含量等指标。结果表明，不同油菜品种受核盘菌侵害时，田间发病率、病情指数等均存在明显差异；菌核病使油菜生物量降低4.20%~45.15%，籽粒产量降低20.74%~40.51%，含油量降低0.32~3.78个百分点，硫苷含量增加2.83%~40.64%，芥酸含量增加11.02%~87.85%，严重影响油菜产量及品质。参试的8个油菜品种中筛选出秦优797和核油919两个抗菌核病品种，可为陕西关中地区油菜菌核病抗性品种的筛选、推广应用提供技术支撑。

In order to explore the resistance of different rapeseed varieties to Sclerotinia sclerotiorum and the impact of Sclerotinia sclerotiorum on the yield and quality of different rapeseed varieties in Guanzhong, Shaanxi Province, this experiment investigated the field incidence and disease index of Sclerotinia sclerotiorum during the maturity period of different rapeseed varieties in Guanzhong, Shaanxi Province, and measured indicators such as biomass, grain yield, oil content, glucosinolate content and erucic acid content. Results showed that when different rapeseed varieties were attacked by Sclerotia sclerotorum, there were significant differences in field disease incidence and disease index. Sclerotinia sclerotiorum reduced the biomass of rapeseed by 4.20% to 45.15%, the grain yield by 20.74% to 40.51%, and oil content by 0.32 to 3.78 percentage points, respectively, whereas the glucosinol content and erucic acid content were increased by by 2.83% to 40.64% and 11.02% to 87.85%, respectively, which seriously affected the yield and quality of rape. Among the 8 rapeseed varieties tested, 2 varieties resistant to Sclerotinia sclerotiorum, namely Qinyou 797 and Heyou 919, were screened out. This can provide technical support for the screening, promotion, and application of rapeseed varieties resistant to Sclerotinia sclerotiorum in the Guanzhong region of Shaanxi Province.

S565.4；S435.654

陕西省农业协同创新与推广联盟项目(LM202311)。