The study of ecological flexibility and adaptability of black current varieties in conditions of Kirov region

The researches had been held in 2015-2021ss in FSBSI FARC of the North-East (FEDERAL STATE BUDGET SCIENTIFIC INSTITUTION “FEDERAL AGRICULTURAL RESEARCH CENTRE”). The studied objects were 36 varieties of black current collection of 2013 planting year. The check variety was Vologda. The aim of the researches is to estimate black currant varieties for productivity, fruiting stability, sustainability and adaptability in conditions of Kirov region. The most common technique to estimate productivity of the varieties is comparison with the check variety. 13 varieties were referred to the most numerous group of high productive (4.7-14.3 t/ha), including the varieties of FARC of the North-East, such as, Benefis (Benefit) and Sputnick (Satellite). The coefficient of productiveness stability (S) and the coefficient of adaptability (CA) were calculated for detection of adaptive varieties in conditions of the region. On the coefficient of productiveness stability (S) in conditions of Kirov region, the black current varieties with maximum demonstration of this feature were distinguished: Fortuna (Fortune) (0.86), Arcadia (0.83), Mulatka (Mulatto) (0.83), Dobriy Dzhin (A Kind Jenie) (0.82), Alivas (0.79) and the check variety Vologda (0.77). The estimation of the adaptability coefficient (CA) allows distinguishing 16 black current varieties with high adaptability (101280 % on average over 7 years). The coefficient of regression (b_i) shows how far the amount of harvest varies in changing environmental index per unit and characterizes flexibility of the variety. 10 flexible, high-intensity varieties, which coefficient of regression was 6.8-1.4, were identified. The technique, which was suggested by S. N. Shcheglov, allows the combination of productivity and sustainability. The applying of the technique permitted to distinguish 13 varieties with above the average productivity among the whole complex of varieties (more than 4.5 t/ha). As a result of the research, the following black currant varieties were emphasized: Benefis (Benefit) which was differed in high productiveness stability, average fruiting stability, high flexibility and adaptability; Sputnick (Satellite) and Naslednitsa (Inheritress), which combined high productiveness stability, high flexibility and adaptability. The adaptive varieties of the intensive type Cherniy Zhemchug (Black Pearl) and Nezhdanchik showed high but instable productivity during the years. The productive varieties Arcadia (the selection of FARC of the North-East) and Dobriy Dzhin (A Kind Jenie) were prominent for high fruiting stability and adaptability.

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