ASSESSMENT OF AGRICULTURALLY IMPORTANT FEATURES OF WINTER AND SPRING TRITICALE COLLECTIONS (X TRITICOSECALE WITTMACK)

The total collection comprises 1795 accessions (788 spring and 947 winter var.). The results concern 4-year studies on the population of 136 varieties of winter triticale and 155 spring triticales, carried out in the years 1986-1989. The analyzed winter and spring triticales showed high resistance in field conditions, to Erysiphe graminis, Puccinia recondita, Puccinia graminis; however, they were highly susceptible to the fungus Septoria nodorum. The value of the analyzed quantitative characteristics and their range of variability varied in the years. The highest variability was found for the weight of grains per ear (V = 26.4 %; V = 24.2 %) and for the number of grains per ear (V = 22.6 %, V = 17.6 %). The value of these characteristics depended to a large extent on an environmental factor (h2 = 0.42, h2 = 0.36). The weight of grains per ear was highly correlated with the number of grains per ear, both in spring and winter forms (r(xy) = 0.51, r(xy) = 0.59). There is a negative correlation between the protein content in grain and the number and weight of grains per ear (r(xy) = -0.39, r(xy), = -0.40) but the correlation with the weight of 1000 grains was low and insignificant (r(xy) = -0.09).