CONNECTION YIELDING CAPACITY OF SPRING WHEAT WITH ELEMENTS OF PRODUCTIVITY IN ARID CONDITIONS BURYATIA
The results of study of productivity and its elements at the 8 zoned grades and 2 selection numbers of spring wheat, derived iBuryat Agricultural Research Institute in condition dry steppe Buryatia, ar presented. Variable basic element structure and size their contribution in formation yield was identified by conducting ructural and correlation analysis. Varieties were tested in dry conditions without application mineral fertilizers. Variation studied traits on average for year's research (2005-2013) on 55.4 % it was conditioned by the influence condition vegetation. At the same time sowing in the second decade of May, the average for the period of research productivity middle-grades was higher than that of middle - 10.7 %. The main contribution to the yield variability wa added weather conditions of vegetation periods (years) - 76.4 %, and the degree of influence of the varietal characteristics accounted for only 10.3%. Moisture content critical periods growth and development plant predetermined high level yield. Variet features largest contribution of individual structural element in variation yield was educed. The leading role in shaping the productivity in virtually all samples belong to plant height, genotypic variability which amounted to 27.0 %, and 1000 grain weight, and grain weight from the ear. The number of grains per ear and productivity contribute significantly to the yield variability grades Lutescens 937, Aruna, Buryat bristlecone and room L-952. The number of productive stems has a major influence on the formation of yield varieties Buryat 79 and Buryat 34. Plant height and number of grains per ear can serve as indicators of a good drought resistance and productivity in arid conditions region.