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Jeffrey G. Williamson and William O. Cline

2005, Takeda et al. (2008) evaluated the V45 harvester using specially pruned rabbiteye blueberry and southern highbush blueberry ( V. corymbosum hybrids) plants with v-shaped canopies. For rabbiteye, internal bruising and skin splitting were less

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Rogério Ritzinger and Paul M. Lyrene

Open-pollinated southern highbush (V. corymbosum L. hybrids) and F1 (southern highbush × V. simulatum Small) hybrid blueberry seedlings were compared for fertility in a high-density nursery in Gainesville, Fla. Most of the pollen sources in the field were tetraploid southern highbush seedlings. Berries were collected from 100 southern highbush seedlings and from 100 seedlings from southern highbush × V. simulatum crosses. The seeds were extracted and dried on a laboratory bench for several days before weighing. No significant differences were found in seed mass/berry between the two types of seedlings. Although the F1 interspecific hybrids averaged slightly lower in seed mass per berry, this was due to the smaller size of their well-developed seeds, not to poor seed development. The estimated number of well-developed seeds per berry was 35.4 and 39.1 for southern highbush blueberries and their F1 hybrids with V. simulatum, respectively. These results indicate that reduced fertility should not be a problem in using V. simulatum to breed southern highbush blueberries.

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J.R. Ballington, C.M. Mainland, S.D. Duke, A.D. Draper, and G.J. Galletta

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David R. Bryla, Carolyn F. Scagel, Scott B. Lukas, and Dan M. Sullivan

in the soil, and adding more Ca can mitigate this issue. However , application of CaCl 2 and CaSO 4 did not ameliorate the negative effects of NaCl in rabbiteye blueberry or southern highbush blueberry ( V. corymbosum interspecific hybrid

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Creighton L. Gupton, James M. Spiers, and Arlen D. Draper

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Paul M. Lyrene and Wayne B. Sherman

Abstract

Native highbush blueberries (Vaccinium corymbosum L.) from the flatwoods of Alachua County (North-central), Florida and from Highlands County (Central peninsula) were surveyed for chromosome number and crossability with breeding lines derived from northern highbush cultivars. The Alachua County population was predominately tetraploid; a diploid component differed in leaf serration and glandulation. Tetraploid plants were fully cross-fertile with highbush cultivars and breeding lines. Diploid plants from the Alachua County population were cross fertile with both V. elliottii and V. darrowi. V. corymbosum from Highlands County was diploid.

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J.B. Magee, B.J. Smith, C.E. Gupton, and J.M. Spiers

The southern highbush (Vaccinium mostly corymbosum) blueberry cultivars Jubilee, Magnolia, and Pearl River, released by the USDA in 1994, were compared with `Premier' and `Climax', two widely planted rabbiteye (V. ashei) cultivars, on the basis of flowering and harvest dates, yield, and physical and chemical quality parameters. The southern highbush cultivars flowered later and ripened at least 1 week before `Climax', one of the earliest rabbiteyes. `Pearl River' berries had less waxy “bloom” and appeared almost black when fully ripe; they had significantly less anthocyanins than the other cultivars compared. `Premier' was lower in titratable acidity and higher in sugars than the southern highbush cultivars. Although data analysis indicated statistical differences in glucose and fructose concentrations among the other four cultivars, these differences were not pronounced. Based on the quality factors used in this study, the southern highbush cultivars compared acceptably to the rabbiteye cultivars.

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J.R. Ballington', C.M. Mainland, S.D. Rooks, A.D. Draper, and G.J. Galletta

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Jeffrey G. Williamson and D. Scott NeSmith

flower bud removal achieved by several methods on growth of young rabbiteye blueberry plants, and to determine the effect of rate and timing of hydrogen cyanamide sprays on flower bud removal and growth of young southern highbush blueberry plants

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Donna A. Marshall, James M. Spiers, Stephen J. Stringer, and Kenneth J. Curry

Fruit splitting and cracking occurs in rabbiteye and southern highbush blueberries if they receive preharvest rainfall when fully ripe or approaching full ripeness. The splitting can be particularly severe if the rain follows a long period of dry