Ecological plasticity and stability of zoned and promising varieties of winter crops in the conditions of the Middle Volga region

The article presents four-year (2015-2018) results of testing varieties of winter crops of various ecological and geographical origin, zoned and promising for the Samara region. Ecological plasticity and stability of varieties by the method of S.A. Eberhart and W.A. Russell (1966). As a criterion for evaluating varieties in the existing agrometeorological conditions, the indicator grain yield was used. The study studied the varieties of different breeding centers of the Russian Federation