Genetic resistance of cultivated oat and the influence of the mineral nutrition level on stem lodging in Western Siberia

Abstract

The genetic resistance to stem lodging of cultivated oat of the Western Siberian selection with different levels of mineral nutrition in the conditions of the Northern Trans-Urals has been studied. The experimental scheme provided for three new varieties of intensive oat: Talisman, Otrada, Foma. Various levels of the agricultural background were created by applying mineral fertilizers that ensure the planned yield of 3.0, 4.0, 5.0 and 6.0 t/ha of grain. In the course of research, it was found that the Talisman variety has a tendency to lodging at the genetic level. The Otrada variety is able to withstand a yield of up to 5.0 t/ha of grain, Foma – at least 6.0 t/ha. It was revealed that the resistance to lodging has a negative correlation with the length of the upper internode (r=-0.7) and panicles (r=-0.8), as well as a positive correlation with the plant height (r= 0.8). Resistance to stem lodging by 34.3% depends on the level of mineral nutrition, 11.5% - on the genetics of the variety and 6.1% - on the growing season’s weather conditions.