Evaluation of bee attendance of sunflower Rf-lines

The article presents the results of the evaluation of bee attendance of 53 of sunflower Rf-lines. The most and least bee-attentive genotypes were identified. The dynamics of bee attendance of sunflower plants during the flowering period was evaluated. A two-factor analysis of variance was carried out, which showed that the strength of the influence of sunflower genotype on bee attendance was quite significant – 35 %, while the strength of influence of a year conditions on this trait was only 4 %. Bee attendance of experimental hybrids in combinations with two most bee-attentive paternal lines (VK 23, VK 944) and two least bee-attentive lines (K3619, I6 13033) was evaluated. Paternal lines influence the bee attendance of flowering heads of sunflower hybrids obtained with different maternal forms. At the same time, there is no change in the order of attractiveness for bees in hybrids obtained with paternal forms with different degrees of attraction.