Three blueberry progenies from crosses of large-fruited X large-fruited parents were significantly larger in fruit size than 3 progenies from crosses of large-fruited X small-fruited parents. Mean fruit sizes of the 3 large-fruited X small-fruited populations were equal to the fruit size of the smaller fruited parents in each cross, indicating that small fruit size is a dominant character. Large fruit size is not linked with low yield.
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Draper et al. (1969) studied this question.