ISHS Acta Horticulturae 112: Symposium on Breeding and Machine Harvesting of Rubus
SCREENING FOR FRUIT ROT RESISTANCE IN RED RASPBERRIES AT EAST MALLING |
| Author: | V. H. Knight |
| Abstract:
Red raspberries have been screened for post-harvest fruit rot resistance. Since 1977 a standardized test of fruit stored at 18.4°C and RH95-100% for 72 h has been used. The most promising material is that derived from Rubus occidentalis, R. crataegifolius and R. phoenicolasius. Clonal susceptibility to fruit Botrytis was positively correlated with susceptibility to Cladosporium and Alternaria; other spoilage organisms were infrequent. Fruit rot was positively correlated with fruit weight but the correlations were generally low. There is good potential for selecting rot resistant, large-fruited types. Susceptibility to cane Botrytis was not a reliable guide to fruit Botrytis. Fruit texture was measured in 1978 and 1979 using a raspberry texture meter developed at East Malling Research Station. Clones with high compression and exudation values tended to have less rots but the correlations were low. There was no correlation between texture attributes and fruit Botrytis in 1979. | |
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