Study of world wheat collection intended to create new varieties under the conditions of the Nakhchivan Autonomous Republic of Azerbaijan

During 497 bread wheat accessions from 21 countries belonged to four botanical varieties were studied by us. In the years of experiment duration of the vegetation period of varieties was investigated, 390 or 78.5% of accessions were middle-ripening for the maturity time, 70 or 14.1% were early-ripening and 37 or 7.4% were late-ripening. Winter hardiness and drought resistance of accessions were also studied. 61 accessions with the high winter hardiness and 31 accessions with drought-esistance were defined. It was determined, that the drought negatively affects the formation of reproductive organs, decreasing productivity by 25-60%. 82 bread wheat accessions with high productivity were determined. In our experiments the productivity ranged on the average, from 20.0 to 79.5 c/ha. It was revealed, that the addition of herbicides sharply reduced the number of weeds and increased the yield in winter bread wheat. The increase in the yield in average was 18.0%. The grain quality of bread wheat accessions was also investigated. It was determined that, depending on the individual features of varieties the content of gluten in the grain varied within wide range: on the average it ranged from 18.8 to 50.7% in studied accessions.