SOFT WINTER WHEAT VARIETY YUVIVATA 60 AS A PERSPECTIVE FOR GRAIN PRODUCTION AND SELECTION FOR ADAPTABILITY AND SUSCEPTABILITY TO PHOTOPERIOD

Abstract

Soft winter wheat variety Yuvivata 60 has been characterized according to its economically valuable indices. Its morphological features and biological characteristics have been described. The uniqueness of the Yuvivata 60 genotype has been determined. It is related to a number of ontogenetical peculiarities, ecological and adaptive mechanisms: high ecological plasticity of plants due to genetical heterogeneity that proves inhomogeneity of phenetic markers – spectres of proteins-gliadins, high crop capacity of grain (with the potential of 10 tonnes/hectare) due to high reproductive ability, viz.: multifloweredness (up to 60 flowers in an ear), multispiculateness (up to 23) and ear grain content (96%); high quality of grain (with the amount of protein up to 16%, gluten up to 34%); forming a strong root system (prolonged coleoptile – up to 6 cm, deep and branched bedding of primary and secondary radicles in spring with optimal sowing terms between 25–30 September); medium photoperiod susceptibility and highly active renewal of spring bunch-formation (the variety of prolonged daylight hours); synchronic development of spring shoots (low percentage of aftersprings, earless stems); high photosynthetic productivity of crops (7 g/m2/day conditioned by continuous functioning of the leaf apparatus of the first and second layers, awns and ear); resistance to lodging side by side with medium-growth and high crop capacity of the grain due to a strong and incrassate stem; high resistance to sprouting within the ear (caused by a long latent period); resistance to pests and pathogenic agents of fungus infections, viz. septoriose, yellow stripe rust and various kinds of brand (8–9 points), medium resistance to leaf and stem rust, as well as oidium (5–7 points); high resistance to anomalies of climatope in the autumn-winter and spring-summer periods (drought resistance 8–9 points, winter and frost resistance above average – 7 points). Keywords soft winter wheat, high crop capacity, agricultural and ecological peculiarities, economically valuable characteristics, donor of determining insusceptibility to photoperiod.