УРОЖАЙНОСТЬ КОЛЛЕКЦИОННЫХ ОБРАЗЦОВ ГОЛОЗЕРНОГО ОВСА В УСЛОВИЯХ СЕВЕРНОГО ЗАУРАЛЬЯ

Results are given from studies on productivities of 213 hulless oat accessions. The studies were conducted under conditions of Northern Trans-Ural region in 2012–2015. It was found that the yield formation in hulless oat accessions was 48.6 percent determined by growing conditions. A negative effect of high average daily air temperatures during growing period was observed. Correlation between yield and precipitation was negative (r = – 0.46, r = – 0.64) under extreme conditions, and positive (r = 0.34, r = 0.17) in favorable years. There was observed a positive correlation between productivity and effective heat sum (r1= 0.11–0.96, r2= 0.23–0.83). There was found a negative correlation between productivity and hydrothermic coefficient during the sprouting-panicle earing period (r1= – 0.37…– 0.99), and positive correlation during the earing-wax ripeness period (r2= 0.47–0.79). Correlation between productivity and the sprouting-panicle earing period was positive (r = 0.82–0.83) under sufficient warm availability, soil moisture reserves and abundant rainfall. There was found a positive correlation between the sprouting-panicle earing period and productivity of the plant, productivity of the panicle, thousand-kernel weight, and the number of kernels in the panicle. There was observed a positive correlation between the earing-wax ripeness period and productivity of the panicle (r = 0.42–0.96), the number of florets per panicle (r = 0.35–0.64) and thousand-kernel weight (r = 0.35–0.82). There were determined the main yield attributes of hulless oat varieties grown in Northern Trans-Ural region: productivity of the plant, the numbers of florets and kernels per panicle. There were selected promising variety specimens to be used in breeding for productivity: K-15014, Levsha (Kemerovo Region); K-15339, Progress (Omsk Region); K-10233, Local (Germany), and others.