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  • Author or Editor: Max E. Austin x
  • Journal of the American Society for Horticultural Science x
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Abstract

Naphthaleneacetic acid (NAA) treatments were applied to pruned and hedged vigorous plants of rabbiteye blueberry (Vaccinium ashei Reade). NAA application delayed shoot growth and resulted in earlier flowering and ripening of larger-sized fruit. NAA treatments effects lasted up to 3 years.

Open Access
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Abstract

A field planting on a Leefield loamy sand soil of clone T-110, a mature rabbiteye blueberry (Vaccinium ashei Reade.), was subjected to 6 types of fertilizer using various carriers of N and/or different supplements. The rates of fertilizer applied were 0 (no fertilizer), 1 (N at 67.25 kg·ha−1), and 2 (N at 134.5 kg·ha−1) over an 8-year period. Yield and fruit size were responsive to plant age, fertilizer rate, and the rate of annual precipitation. The 6 fertilizer formulations did not vary in their effects on blueberry yield or fruit size.

Open Access

Cultivars of the economically important rabbiteye blueberry (Vaccinium ashei Reade) were differentiated at the DNA level using the technique of randomly amplified polymorphic DNA. Single decanucleotide primers of arbitrary sequence were used to amplify genomic DNA by the polymerase chain reaction. All cultivars tested exhibited a unique set of collective amplified fragments of distinct molecular weight. A blind fingerprinting experiment resulted in identification of unknown samples without ambiguity. We also clarified the genetic identity of two wild selections of rabbiteye blueberry, `Ethel' and `Satilla', which have been maintained as two different selections, hut are considered by some blueberry breeders to be of the same genetic constitution. The technique also verified the probable identity of two cultivars in a commercial blueberry field by comparing their amplified DNA patterns with those of standard cultivars. No variation was observed between the amplification profiles of `Brightwell' and its presumed sport. A cultivar key based on 11 markers amplified by four primers is presented.

Free access

Abstract

Hedging reduced yield and increased fruit size of rabbiteye blueberry (Vaccinium ashei, Reade) for one or 2 years following hedging, but yields and fruit size were similar to unhedged plants after 4 years. The best hedging treatment time was February, with evaluation taking place over a 5-year period following hedging.

Open Access