Plant and Soil Science

As a result of the study, it was found that the vernalization requirement duration in soft winter wheat. It has been found that the duration of vernalization requirement of soft winter wheat variety Myronivska Slava is 40 days; according to the sensitivity to the photoperiod, the variety can be characterized as highly sensitive to the duration of the day (lengthening the growing season when growing plants in conditions of artificially shortened duration of the day is 11-15 days). The results of the hybridological genetic analysis involving special test lines in the genotype of the Myronivska Slava variety prove that the dominant allele of the Vrd2 gene reduces the duration of the vernalization period. On threshing out of wheat plants except genes that determine the vernalization requirement, a system of genes that to control the sensitivity of plants to the photoperiod (Ppd) has a significant influence. The soft winter wheat variety Myronivska Slava by genetically determined peculiarities of its development in the early stages of ontogeny, adapted to the natural conditions of cultivation in the Forest-Steppe of Ukraine. For the best preparation of the variety Myronivska Slava until the winter season, it is not necessary to sow its seeds too early in order not to provoke the passing of vernalization requirement before the beginning of the winter period and the transition to generative development with possible warming during wintering, and therefore possible damage to plants.

genes, duration of vernalization period, soft winter wheat, variety, sensitivity to the photoperiod, hybridological genetic analysis