Evaluation of spring barley samples in the competitive variety testing in the Central Yakutia

There have been presented the results of spring barley samples in the competitive variety testing. The evaluation was based on the length of a vegetation period and grain yield. Yield structure depends primarily on productive tillering, ear weight, and 1000-grain weight. The purpose of the current work was to study and evaluate spring barley samples in the competitive variety testing in the Central Yakutia. The study was conducted in the experimental plots of the Yakut SRIA at the breeding station in 2020-2022. The objects of the study were four samples from the competitive variety testing nursery. The variety Tammi was the standard of the trial. It is an ultra-early maturing variety with moderate drought tolerance and loose smut resistance. Sowing was carried out on the designated dates, according to the standard scheme. There was a fourfold repetition. Soil fertility was assessed in the biochemistry laboratory. The soil was permafrost permafrost-affected, taiga-pale and solodized. The weather conditions varied in temperature and precipitation. As a result of the study, the samples in the competitive variety testing varied in the length of a vegetation period, averaging from 68 to 78 days. The mean productivity of the spring barley samples ranged from 2.8 to 3.8 t/ha over the studied period. Productivity of the standard variety Tammi averaged 3.5 t/ha. The trait ‘1000-grain weight’ of the tested varieties ranged from 38.8 to 48.8 g. The sample Dygyn formed mall grains of 38.8 g, while larger grains of 48.8 g were produced by the sample E-68. The productive tillering capacity of the studied samples ranged from 2.1 to 3.1. The highest productive tillering capacity was observed in the sample Dygyn (3.1).