RASPBERRY BREEDING FOR MECHANICAL HARVESTING IN NORTHERN RUSSIA
Germplasm from the Scottish Horticultural Research Institute and from East Malling Research Station proved the best sources of improved fruit firmness. Hybrids involving R. crataegifolius showed very high resistance to fruit rot and an ability to maintain good fruit quality for 6–12 days after ripening. R. odoratus was used as a donor of field immunity from cane midge (Thomasiniana theobaldy Barns.) and Didymella applanata Sacc.
No raspberry cultivars or hybrids under trial are suitable for machine harvesting in Northern Russia, but the Institute of Horticulture in Moscow and the Institute of Horticulture of Siberia (Altaj area) have promising material.