FROST RESISTANCE OF VARIETIES AND LINES OF WINTER SOFT WHEAT

One of the main reserves for increasing the production of winter wheat grain is the introduction of highly productive varieties. For varieties of winter wheat, sharp fluctuations in t in early spring are very dangerous, when during the day it rises to 10°C, and at night it drops to -10°C. In winter, winter wheat varieties freeze at -17 ... - 19°C without snow cover, and with it it can withstand up to -25°C. Evaluation on the basis of winter hardiness is the ability of plants to withstand a complex of adverse factors during overwintering.