Complex assessment of genotypes of soft winter wheatby features structurally and functional organizations of productivity signs

The analysis of the relationship between anatomical and morphological features of soft winter wheat, their relationship with plant productivity help to determine the directions of the selection work. To determine the nature of the dependence, a collection of the varieties and selection lines of soft winter wheat has been studied, which included 49 samples of different ecological, geographical and genetic origin. The cluster and factor analysis of the samples has been performed, which allowed to obtain a comprehensive assessment of the set of the studied features. By placing the varieties in the space of the two main factors of the structural and functional organization of the morphoanatomical features of productivity, we can get a clear idea of the differentiation of samples by two main systems - ear productivity and photosynthetic and conductive systems. According to the results of the cluster analysis, five groups of soft winter wheat varieties have been identified according to the complex of plant productivity elements. Each of these clusters is a separate morphobiological type and is characterized by the specific level of development of the individual elements of productivity. Key words: soft winter wheat, anatomical structure of stem, factor analysis, cluster analysis, donor and acceptor system.