SUSCEPTIBILITY OF APRICOT, NECTARINE AND PEACH CULTIVARS AND HYBRIDS TO PLUM-POX VIRUS

The aim of this study was to determine the degree of plum pox virus (PPV) susceptibility of different apricot, peach and nectarine cultivars, and the selection of the resistant ones, as parents in genetic breeding for study to transmit the resistance to the progeny.

Stella cultivar with the susceptibility index O on leaves and fruits, after 16th years from planting; and Manitoba, Kinred, NJA 19, NJA 48, NJA 53, NJA 56, NJA 59, and Sony, with the susceptibility index O, after 9th and 7th years from planting have been used as parents, creating apricot progeny that were investigated in order to determine if it is possible to introduce a good level of resistance of this cultivars into new hybrids.

Seventy-five percent of apricot progeny belong to Stella x Excelsior family (resistant x medium) had O susceptibility index on leaves or fruits.

Magnific 79, Pekin 7–22, C2R1 7T1 25, Navoi, Suncrest peach cultivars and Harko, Fairlane, nectarine cultivars had susceptibility index O on fruits and can be used as genitors in breeding to study how they transmit this feature to the progeny.