SOLATION OF SOURCES OF SELECTIVE SECURITY CHARACTERISTICS AMONG IMMUNE CULTIVARS IN THE GENE POOL OF KRYMSK EXPERIMENTAL-BREEDING CENTRE, BRANCH OF THE RUSSIAN INSTITUTE OF PLANTS GROWING

Based on the results of a long-term study of apple varieties that are immune to scab, apple genotypes are distinguished, superior to others in total yield, both in the first period of fruiting and in full fruiting. Fertility and other pollen parameters of immune varieties - interspecific apple hybrids – have been tested. The quality of the fruits was assessed and the best in mass, skin color, pulp properties, taste, and content of biologically active substances were selected. Recommended varieties of apple for involvement in breeding programs on the basis of – immunity to scab with high yields and given excellent commodity-consumer qualities of the fruit: ‘Goldrush’, ‘Interprise’, ‘William Prite’, ‘Pristine’, ‘Dayton’, ‘Florina’, ‘Renora’, ‘Revena’, ‘Retina’, ‘Reanda’.