An analysis of the inheritance of the density of the pulp of a berry in a number of varieties of strawberries

Relevance. Currently, there are several approaches to assessing the values of the heritability coefficient. The aim of our study was to assess the donor potential on the basis of the “density of berry pulp” in strawberry varieties.

Methods. In the article are present the results of evaluating of the donor potential of four strawberry varieties – Onda, Belrubi, Florence, Elizabeth II — on the trait «firmness of fruit», according to the values of the heritability coefficient in the narrow sense h2. The calculation of the values of the coefficient of heritability was carried out on the basis of the correlation analysis by the Pearson method. The work was conducted at the experimental station of the Federal State Budget Scientific Institution «North Caucasian Federal Scientific Center of Horticulture, Viticulture, Winemaking» (Krasnodar, Russia).

Results. Spend studies have shown that the predominant additive effect of genetic interactions was noted in the Onda strawberry variety, which showed the values of heritability coefficient h2 in three hybrid selections with their participation, amounting to 0.59, 0.64 and 0.75. For the Belrubi variety in six hybrid selections with his participation is shown the presence of both additive and non-additive gene interactions. Belrubi heritability coefficients is ranged from 0.11 to 0.55. Florence variety, according to the obtained values of the heritability coefficient of 0.23 and 0.43, can show both nonadditive and  additive effects of genes in selections 11-1-15 Belrubi × Florence and 14-1-15 Belrubi × Florence in trait of the firmness of fruit. Non-additive genetic interactions (h2 is 0.14) are also noted for the Elizabeth II variety in the hybrid selection 20-1-15 Onda × Elizabeth II. In accordance with the hereditary potential of donors and sources, due to additive and non-additive interactions of genes and the heterosis effect in hybrid offspring on the trait «firmness of fruit», Onda strawberry variety was selected as a donor and Belrubi was selected as a source.

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