ISHS Acta Horticulturae 290: Genetic Resources of Temperate Fruit and Nut Crops
BLACKBERRIES AND RASPBERRIES (RUBUS) |
| Authors: | Derek L. Jennings, Hugh A. Daubeny, James N. Moore |
| Abstract:
The genus Rubus, of the Rosaceae family, contains a large number of highly variable and heterogeneous species which occur in all parts of the world except the desert regions; they are most numerous in the northern hemisphere. In most species the plants are shrubs with biennial canes which vary in habit from erect to trailing. Most of them are deciduous but a few are evergreen and those of the Cylactis sub-genus are annual. In most raspberries and blackberries the canes are biennial, producing vegetative growth in the first year (primocanes), and bearing fruit in the second year (floricanes). Raspberry cultivars whose canes bear fruit at the end of their first year's growth are described as primocane fruiting. In all species, the flowers usually have five sepals and petals, numerous stamens and numerous carpels that are whorled around the receptacle. Their method of reproduction is extremely versatile, combining systems of sexual and sub-sexual (pseudogamous) methods of reproduction by seed. | |
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