Use of Vaccinium octoploids to facilitate 4x-6x gene transfers |
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Authors: | R G Goldy P M Lyrene |
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Institution: | (1) Fruit crops Department, University of Florida, 32611 Gainesville, Florida, USA;(2) Present address: Horticulture Department, North Carolina State University, Box 7609, 27695-7609 Raleigh, NC, USA |
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Abstract: | The use of an 8x Vaccinium produced through doubling a tetraploid hybrid with colchicine was studied as a means of facilitating gene exchange between V. corymbosum L. and V. ashei
Reade. Analysis included meiotic observations and crossability studies of the 8x plant, as well as attempting to develop 6x breeding lines. Meiotic analysis revealed the presence of micronuclei in Telphase II products and polyspory in sporads. In the crossability studies five 4x highbush plants were pollinated with 8x o2 4x pollen. Data gathered included: % fruit set, average weight/fruit, average number of seeds/fruit, average number of seedlings/pollination, and number of 6x seedlings. Octoploid pollinations were significantly lower than 4x pollinations in all parameters. One 6x plant was produced from the 4x-8x crosses but was found to be mitotically unstable, having somatic cells with chromosome numbers ranging from 48 to 168. |
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Keywords: | Vaccinum ashei rabbiteye Vaccinium corymbosum highbush blueberry blueberry interspecific hybridization |
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