THE CHARACTERISTICS OF YIELD OF SOFT WINTER WHEAT COMMERCIAL SORTS OF DIFFERENT ECOLOGICAL-GENETIC ORIGIN UNDER THE CONDITIONS OF NORTH-EAST FOREST STEPPE OF UNRAINE

The analysis of hydrothermic regime within 2012-2013 vegetative years under the conditions of north-east forest steppe of Ukraine is presented. It gives an opportunity to assess the patterns of soft winter wheat of different ecological-genetic origin according to the potential yield and to define the norm of reaction. With the help of two-factor variance analysis it is proved that statistically the sort genotype influences significantly the growth of grain yield. The soft winter wheat yield varies greatly depending on weather conditions of vegetative year. The highest level of average yield in the researches the patterns formed in 2014 – 771 g/sq.m., with variation from 1336 g/sq.m. (max) to 282 g/sq.m. (min). The best results were observed during three years of researches in the most sorts which refer to forest-steppe ecotype, namely – Sviatkova, Lehenda myronivschiny, Svitanok myronivschiny, Pysanka, Myronivska 65, Lisova pisnia and others