ISHS Acta Horticulturae 262: V International Symposium on Rubus & Ribes
BREEDING RUBUS CULTIVARS FOR WARM TEMPERATE CLIMATES |
| Authors: | H.K. Hall, L.R. Brewer |
| Abstract:
Maritime climates as in New Zealand are moderated by the neighbouring ocean, and severe extremes of temperature are rare. Winter damage to Rubus is uncommon, and summer temperatures are infrequently high enough to affect fruit quality. Humidity is high in many areas encouraging large fruit development. However fruit rots are often severe, and cool temperatures at flowering reduce fruit set in some genotypes. The greatest difficulty encountered is lack of winter chill, giving rise to poor and sporadic bud break in springtime. Most tetraploid blackberries, most red raspberry cultivars and many of the polyploid blackberries from the Pacific Coast of the United States are not adapted for this reason. The best adapted cultivars include ‘Smoothstem’ and ‘Thornfree’ tetraploid blackberries, ‘Marcy’ red raspberry, and ‘Boysen’, ‘Young’, ‘Olallie’ and ‘Aurora’ hybrid berries. | |
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