EVALUATION OF QUALITATIVE PARAMETERS OF SYNTHETIC WHEAT GENOTYPES SOWN UNDER DROUGHT CONDITIONS

Most synthetic wheat samples are widely used in the international breeding program to obtain new varieties in the future. To this end, various research projects are being carried out in the country. At present, the Genetic Resources Institute of NASA conducts extensive research to study the yield, ripening period, disease resistance, resistance to drought and salinity conditions of various wheat samples. The research work was carried out at the Jalilabad Regional Experimental Station of the Research Institute of Crop Husbandry. 68 synthetic hexaploid wheat genotypes were used in the research work. In these samples, mainly protein, essential amino acids - lysine and tryptophan, yield (1 m2) were studied. The analysis of protein content was carried out according to the Kjeldahl method, and the determination of tryptophan content from non-essential amino acids was carried out according to A. Yermakov, N. R. Yarosh and lysine according to A.S. Museiko and A. F. Sysoev. According to the 3-year average result, the protein content of these genotypes varied on average from 9.1 to 18.7% under drought conditions. Among them, samples with a high protein content were selected and essential amino acids – lysine, tryptophan and yield indicators were also determined. Compared to St. Akinchi 84 (15.9%), the results revealed in 20 synthetic hexaploid wheat genotypes were higher. Japan 59 J-3 was recorded as the sample with the highest protein content, and the grain protein content was 18.7%, lysine 1.53%, and tryptophan content 0.55%. As a consequence, samples with high biochemical parameters were identified. Synthetic wheat samples with high parameters can be used in breeding programs to obtain new high-quality varieties and forms. As a result of our analysis, it was found that in most samples with high protein content, the protein content is inversely correlated with the amount of lysine and directly correlated with the tryptophan content. This coincides with the results obtained by many researchers.