Abstract
The genotypical potential of strawberry varieties is the basis for the implementation of economically valuable crop indicators in specific growing conditions. Assessment of the variability of productivity traits and quality of berries is one of the key directions in many modern studies on the selection and variety study of garden strawberries. The goal of this work was to assess strawberry varieties by a complex of characteristics of the yield structure and fruit quality, taking into account their genotypic characteristics, as well as to identify of their hereditary potential in regional cultivation conditions. The analysis of long-term data on 17 varieties of strawberries has been carried out. Using the methods of two-way analysis of variance, contributions of the principal components and Ward’s cluster analysis, an assessment was made of the variability of the taken into account traits in strawberry varieties. Combining the studied varieties into groups made it possible to identify the best forms by the valuable traits. A high responsiveness to the cultivation conditions in the Krasnodar region was established for the varieties Nelli, Alba, Florence, Elegia, Honeoye, Onda and Vima Xima in accordance with their genotypic potential.
Highlights
Using the methods of two-way analysis of variance, contributions of the principal components and Ward’s cluster analysis, an assessment was made of the variability of the taken into account traits in strawberry varieties
The high level of quantitative values of economically valuable traits, taking into account the ecologically conditioned adaptability of garden strawberries, is directly related to the selection of varieties with the highest values of valuable traits, and to the selection of promising genotypes according to the ratio of their hereditary potential and phenotypic manifestation of the studied indicators [4,5,6]
The applied genetic and statistical methods for assessing varieties by a group of traits and several independent factors are traditionally based on models of analysis of variance with the calculation of several variance variances, as well as on multivariate mathematical procedures, which include the method of principal components and cluster analysis, which involves the use of direct empirical values of the considered characteristics, and quantitative indicators of variation for each of the studied forms
Summary
The high level of quantitative values of economically valuable traits, taking into account the ecologically conditioned adaptability of garden strawberries, is directly related to the selection of varieties with the highest values of valuable traits, and to the selection of promising genotypes according to the ratio of their hereditary potential and phenotypic manifestation of the studied indicators [4,5,6]. Taking into account the adequate specificity of the graphic display of the formed groups of varieties according to the principle of minimum intragroup and maximum intergroup variance, the use in cluster analysis, in addition to direct quantitative indicators of traits, the values of internal variances, reflecting the reaction rate of each studied genotype to growing conditions for individual traits, seems appropriate for assessing the closeness of the phenotypic manifestation of the complex of the studied traits to the varietal characteristics of the strawberry genotypes
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