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for management of BB and in a breeding program as sources of resistance in the development of new cultivars. Materials and Methods Isolation and storage of the pathogen. Three strains of X. axonopodis , designated by year of isolation

primocane-fruiting blackberries. In my discussion, I highlight potential value of primocane-fruiting blackberries, provide background on the origin of this type of fruiting habit, and comment on breeding challenges that have been identified in their early

faster accumulation of useful mutations at relatively low costs for breeding programs ( Van Harten, 1998 ). Such treatments were first discovered by Muller in 1927. He discovered that irradiating Drosophila melanogaster with X-rays caused a massive

108 POSTER SESSION (Abstr. 357–361) Breeding and Genetics–Woody Ornamentals

28 ORAL SESSION 1 (Abstr. 001–005) Breeding and Genetics–Floriculture I

131 ORAL SESSION 40 (Abstr. 298–305) Breeding/Vegetable Crops

and Darrow, 1959 ; Sharpe and Shoemaker, 1958 ; Woodell and Valentine, 1961 ). In the southern highbush blueberry breeding program at the University of Florida, many tetraploid hybrids have been produced using diploid V. darrowii 's tendency to

coloration are available. We review the advances in grapefruit cultivar development, the efforts toward breeding novel, potentially desirable cultivars through conventional breeding, induction of mutations through irradiations, and other biotechnological

131 ORAL SESSION 40 (Abstr. 298–305) Breeding/Vegetable Crops

96 WORKSHOP 13 New and Exciting Advances in the Breeding of Ornamental Plants