Correlation between mildew and oidium resistance features of the first generation (F1) hybrids of grape
Aim is to examine the mildew-resistance/oidium-resistance interrelation in F1 of grape. Methods. Phytopathological and biometric methods were used. Results. Analyzing meldew-resistance/oidium-resistance interrelation in F1 offspring upon crossing of resistant components with tolerant ones it was found that relation between the indicated traits may vary within broad ranges depending on combinations of crossing. Hybrids derived from different combinations showed distinct correlation coefficients. Conclusions. The results obtained suggest the interdependence of inheritance of the studied traits that mediate resistance to mildew and oidium, and, hence, the possibility of breeding grape varieties showing the group resistance to fungal diseases without chemical protection against mildew and powdery mildew, with good quality crop for use in the breeding and implementation in viticultural practices.
Key words. Vitis vinifera L, grape, resistance, Plasmopara viticola, Uncinula necator, correlation.