Progress in plant tolerance to the fungal disease Sclerotinia in breeding experiments on winter oilseed rape

Summary Sclerotinia sclerotiorum is a pathogen which causes disease of oilseed rape. Severe plant infection contributes to decrease in the quality crop. It therefore important pay attention whether hybrids are highly tolerant this fungal at early stages breeding. In study, question interest there has been progress increasing tolerance new pathogen. Three years breeding experiments (2014, 2015, 2017) included analysis. Each year, three five were carried out, with several dozen varieties and standards. series was repeated locations. Because degree assessed on scale (from 1 – highest 9 least infection), analysis out using an ordinal logistic model. noted that earlier standard varieties’ probability had smaller range (empirical 0.5–0.83) than last analyzed year 0.33–1.00). The results show 2014 2015 exhibited significantly higher Sclerotinia, but 2017 none better standard. Perhaps selection eliminated less varieties. However, be able draw more general conclusions, it would necessary repeat study controlled conditions (a greenhouse), where level spores their effect plants could controlled. Obtaining will enable reduction production costs, since no need monitor infestation occurs use corresponding protection products.