조생종 고품질 포도 품종 ‘옥랑’ 육성

Breeding of a Black Table Grape Cultivar ‘Okrang’ (Vitis sp.) with Early Maturity and High Quality

‘Okrang’ is a grape cultivar, obtained from an interspecific (Sheridan × Campbell Early) cross and it was preliminarily selected in 2002. After regional adaptability tests under the name of ‘Poyeon-03’ at seven sites from 2003 to 2009, it was finally selected in 2009. Its mean date of bud break, at Okcheon was 17 April, full bloom occurred on 29 May, and optimum harvest time is late August, which is almost 40 days earlier than ‘Sheridan’. It has a low to moderately vigorous growth habit and medium intensity of anthocyanin coloration on main veins on upper side of the mature leaf. Its Bunch size excluding peduncle is medium and berry is apt to a little loose. Mean cluster weight is 300 g and mean weight of berries is 3.4 g. The mean total soluble solids concentration is 16.9 °Bx, which is higher than that of ‘Sheridan’ (16.6 °Bx). The skin color is black with abundant fox aroma and berry shattering is low. Sensory quality tests showed that red wine made from ‘Okrang’ grapes was superior to that made from ‘Sheridan’ grapes.