Ecological plasticity and stability of sunflower varieties in the conditions of the Lower Volga region

Abstract

According to the results of competitive variety trials in 2010–2019, the ecological stability and plasticity of nine sunflower varieties of three maturity groups were studied. The most stable yield varieties Stepnoy 81 and Stepnoy 82, which belong to the extensive group, have been identified. High plasticity had varieties Saratovskiy 20, Saratovskiy 21, Saratovskiy 82, Saratovskiy 85, Saratovskiy 86 and Slastena. These varieties belong to the intensive type and are well responsive to varying growing conditions and are more demanding on a high level of agricultural technology. The information obtained on the ecological plasticity and stability of sunflower varieties can be used in breeding programs to create new varieties, as well as for the rational placement of the studied varieties in the cultivation zones in agricultural production.