Adaptability of barley varieties in terms of fat content in grain under conditions of Krasnoyarsk forest-steppe

Abstract

The aim of the study was to analyze possible relationship between fat content in grain of barley varieties and level of their stability for this biochemical trait. The work involved 15 varieties of hulled barley, which were grown for three years in conditions of the Krasnoyarsk foreststeppe (Minino farm, Emelyanovsky district, the Krasnoyarsk Territory). Climatic conditions in the research years differed significantly in terms of temperature and precipitation during the growing season. After harvesting plants, fat content in barley grain was measured by the chemical method according to GOST 13496.15-97. For barley varieties, two parameters of ecological plasticity (coefficient of variation; stress resistance index) and four stability parameters (indicator of level and stability of variety; homeostatic parameter; stability factor; index of selection value of variety) were calculated according to the indicated biochemical trait. It was found that Simon and Pallidum 4727 had the lowest value of plasticity and the highest value of stability (and, accordingly, the minimum sum of ranks) in terms of fat content in grain for the conditions of the Krasnoyarsk forest-steppe. G 18619, G 19589 and Dygyn were least valuable in terms of adaptability parameters with the maximum sum of ranks. It was shown that barley varieties with a higher fat content in grain were characterized by increased values of all stability parameters for this trait, and the indicated positive relationship was statistically proven for the Cs parameter. The result obtained shows that through the successful selection of barley for the maximum stability of grain fat content trait, oil content will not decrease.