Institute of Agriculture

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Access type: UnknownAuthor: search.filters.author.Venelin Roychev

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    INVESTIGATION OF THE CORRELATIONS BETWEEN QUANTITATIVE TRAITS WHICH DETERMINE YIELD IN THE VINE CULTIVAR BOLGAR AND THE HYBRID COMBINATION BOLGAR X RUSSALKA 1
    (Goce Delcev University of Štip, 2020)
    Venelin Roychev
    ;
    Dushko Nedelkovski
    ;
    Klime Beleski
    The correlations between quantitative traits, which determine yield in the vine cultivar Bolgar and F1progeny of the hybrid combination Bolgar x Russalka 1 have been investigated through Path analysis. It has been found that there are no highly significant traits for the formation of yield from this cultivar, for which the correlation coefficients, direct and total indirect influences have positive values. Positive correlations have been reported between the two parent cultivars and F1 progeny for the traits: shoot and fruiting shoot fertility coefficient, cluster width, total number of shoots, fruiting shoots and clusters. All studied fertility coefficients in the cultivar Bolgar exert positive direct influences, determined by moderate correlations, on the seedlings from F1 progeny. The correlations of the other traits and the influence of separate parent cultivars have positive or negative values, which can be used in the selection of valuable elite forms.
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    POTENTIAL AND POSSIBILITIES OF REBO – NEW GRAPEVINE VARIETY (Vitis vinifera L.) IN GROWING CONDITIONS IN REPUBLIC OF NORTH MACEDONIA
    (Goce Delcev University of Štip, 2019)
    Dushko Nedelkovski1
    ;
    Klime Beleski
    ;
    Goran Milanov1
    ;
    Venelin Roychev
    ;
    Violeta Dimovska
    Rebo (Rigotti 107-3) is a vine variety that originates from Trentino, North Italy. It was selected by the researcher Rebo Rigotti by crossing the varieties Merlot x Terlodego at the agriculture and forest experimental station in S. Michele all’ Adige. According to the literature the idea of the breeder was to produce new variety that would be similar to Merlot but more resistant to cold climate conditions. Our idea to plant Rebo in Macedonia was to grow this variety on sites with higher altitude locations that are difficult for growing Merlot. The vineyard for this study is located in the north part of Macedonia on the mountain German near the town of Kriva Palanka, area typical for growing frost resistant varieties. In this research paper we analyzed the mechanical structure of the grape cluster and berries, the quantity of sugar and titratable acids in the grapes. In the wine we analyzed the quantity of total phenols, total anthocyanins, wine colour (CI;H), total flavan-3-ols and standard chemical analysis of the wine