ADAPTIVE SELECTION: THEORY AND PRACTICE OF THE SELECTION FOR PRODUCTIVITY

Abstract

The Questions of study "genotype-environmental” interaction are occupy a central place in the development of the theory of Adaptive selection, because such relationship varied and complex as the nature and degree of the manifestation. The selection of the same promising accessions in the realization of their productive properties aimed at the selection of genotypes, for whom the impact of this interaction is minimal. For example, the creation of winter wheat varieties CASAR and Kalach 60 proved that the screening efficiency is dictated by choosing selective background and combination of natural condition, contributing to the assessment of "genotype-environmental” components along the environmental vector created the system of multilokacionnyh tests. Cluster analysis of the 30 varieties of winter wheat yield allowed to group them by the nature of the productive properties realization and to distinguish two groups with high indicators. Kalach 60 with an average yield of 10516.05 pounds per hectare was integrated into the Pearl of the Volga region group. KASAR, with the yield of 9854,66 pounds per hectare, formed its own cluster group, which included selection lines L 52-98, as well as L 40-01 and L 41-01. Significant differences of the varieties were in variability of productive properties, depending on the emerging conditions. The first cluster group varieties are characterized by the more restrained variation in yield than KASAR. A detailed analysis was revealed that the latter varieties significantly reduced the indices in more severe growing conditions, exceeding the first in the years favorable for the moistening regime. In light of this decision on biometric methods used to identify differences on the fenotipicheskom level, the task falls to dissect a quantitative manifestation of biological concepts and increase its informative about the nature adaptation of new varieties on the multidimensionality of the factor. The article gives a detailed description of new winter wheat varieties according to the results of the studies.