3. Investigation of the Variability Of Quantitative Traits in a Hybrid Combination between a Seeded and Seedless Vine Cultivar (Vitis Vinifera L.)

Author: Venelin Roytchev, Todorka Mokreva


The variability of quantitative traits in F1-progeny from a cross between a seeded and a seedless vine cultivar has been investigated by means of Path-analysis. It has been established that both parent cultivars positively influence fertility, cluster and berry sizes, amount of sugars and acids, as well as the duration of certain phenophases. The following indices represent the biggest shares in the relative participation in yield formation: total number of clusters, main shoot fertility coefficient, average cluster mass and total number of fruiting shoots. As regards the total variability of the phenotype in the F1-progeny, the mother cultivar exerts the strongest influence through the shoot fertility coefficient, sugar amount and total number of shoots, while the father cultivar – through the budding-technological maturity, main shoot fertility coefficient, cluster width and total number of buds.

Keywords: Path-analysis, quantitative traits, F1-progeny, vine cultivars.