The new table grape cultivar 'Shine Muscat' is a diploid derived from Vitis labruscana Bailey and V. vinifera L. It has large yellow-green berries, crisp flesh texture, muscat flavor, high soluble solids concentration and low acidity.
Its seedless berries can be commercially produced by applying gibberellic acid treatment to flower and fruit clusters in full bloom and 10 to 15 days after full bloom, respectively. Like the grape cultivar 'Kyoho', its vine and fruit clusters seem to be fairly tolerant to fruit ripe rot, downy mildew, and powdery mildew although it is sensitive to anthracnose.
Shine Muscat' resulted from a cross of Akitsu-21 and 'Hakunan' (V. vinifera) made in 1988. Akitsu-21 is a hybrid of 'Steuben' (V. labruscana) × 'Muscat of Alexandria' (V. vinifera). The original vine was primarily selected in 1997 in a NIFTS vineyard at Akitsu, and was tested as selection Akitsu-23 in 30 locations of 27 prefectures under the Ninth Grape Selection National Trial initiated in 1999. It was ultimately selected, and released as 'Shine Muscat' in 2003, and registered as No. 13,891 under the Plant Variety and Seed Act of Japan in 2006.
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