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‘Grosz Krone’ is a tetraploid table grape cultivar with purplish black skin, resulted from a cross of ‘Fujiminori’ and ‘Aki Queen’ made in 1998. The original vine of ‘Grosz Krone’ was initially selected in 2002 in a vineyard at Akitsu, and was tested as selection Budou Akitsu 30 under the 13th Grape Selection National Trial initiated in 2010. It was released as ‘Grosz Krone’ in 2017, then registered as No. 28086 under The Plant Variety and Seedling Act of Japan in 2020. The vine vigor is strong. Sprouting and flowering times are 1 day and 2 days later than ‘Kyoho’ in the national trial. Time taken to trim flower clusters was the same as ‘Kyoho’, but that to trim berries is shorter than ‘Kyoho’. Harvest time of seedless fruit is the same as ‘Kyoho’ but 4 days earlier than ‘Pione’. Berry weight averages 19 g, larger than ‘Kyoho’ and ‘Pione’ in seedless fruit production. Soluble solids concentration averages around 18.4 %, similar to those of ‘Kyoho’ and ‘Pione’. Titratable acidity averages 0.46 g/100 ml, significantly lower than that of ‘Kyoho’. Flavor is foxy. Berry skin cracking sometimes occurs depending on years and locations. Seedless berries can be produced by GA treatment, but streptomycin treatment before anthesis is needed for complete convert to seedless berries. Berry skin color is attractive purplish black. Berry skin shows good coloration compared to ‘Kyoho’ and ‘Pione’ even in warm region of south west districts in Japan. Therefore, ‘Grosz Krone’ is expected to be a suitable cultivar for adapting to warmer climate., ‘グロースクローネ’は,1998年に‘藤稔’に‘安芸クイーン’の交雑を行い,そこから得た実生から選抜された,紫黒色の大粒ブドウである.2010年からブドウ第13回系統適応性検定試験に供試し,2017 年2 月の果樹系統適応性・特性検定試験成績検討会で新品種候補にふさわしいとの合意が得られ,2020 年8 月14 日に第28086 号として種苗法に基づき品種登録された.樹勢は強い.発芽期は‛巨峰’より1日,開花期は‘巨峰’より2日遅い.満開～満開3日後と満開10～15日後にジベレリン25ppmに花(果)穂を浸漬処理することにより無核果生産できるが,安定した無核果生産にはストレプトマイシンの利用が望ましい.花穂整形労力は‛巨峰’並み,摘粒労力は‘巨峰’より少ない.果実成熟期は‘巨峰’とほぼ同時期であり,‘ピオーネ’より4日程度早い.果粒重は19 g程度,糖度は18.4%程度,酸含量は0.46g/100ml程度である.裂果性は‘巨峰’や‘ピオーネ’よりやや多い.無核栽培における含核数は0.10個/粒で,‘巨峰’と同程度である.果皮色は紫黒色で,気温が高い夏秋季の西南暖地においても‛巨峰’や‘ピオーネ’と比較して安定して良好な着色が得られる.高温下でも着色が容易なため,‛巨峰’や‛ピオーネ’において着色不良が発生しやすい西南暖地での普及が見込まれる.

Sun Verde' is a tetraploid table grape cultivar released by the National Agriculture and Food Research Organization Institute of Fruit Tree Science (NIFTS) in Japan. It has large yellow-green berries, high soluble solids concentration, and low acidity. The berries can be converted to seedless ones by applying gibberellic acid, first to flower and fruit clusters in full bloom and once again at 10 to 15 days after full bloom. 'Sun Verde' resulted from a cross of 'Dark Ridge' and 'Centennial' made in 1993 at Akitsu, NIFTS. The original vine was initially selected in 2002 in a vineyard at Akitsu, and was tested as selection Akitsu-25 at 33 locations in 32 prefectures under the 11th Grape Selection National Trial initiated in 2004. It was released as 'Sun Verde' in 2010, and registered as No. 20821 under The Plant Variety and Seedling Act of Japan in 2011. The seedless fruit of 'Sun Verde' ripens in late August to early September at Akitsu. Its ripening time was similar to 'Kyoho' and 4 days earlier than 'Pione' in the national trial. Berry weight averaged 11.3 g, similar to 'Kyoho' in seedless fruit production in the national trial. The berry has no distinctive flavor and its flesh is easy breakable and firm. Skin character is medium between slip and tight. Soluble solids concentration and titratable acidity averaged around 19.7% and 0.44 g/100 ml, respectively in the national trial. Soluble solids concentration is significantly higher than in 'Kyoho' and 'Pione', whereas titratable acidity is significantly lower than in 'Kyoho'. Astringency of the flesh is not sensed. Berry skin cracking is rare. The degree of shatter of berries from clusters at full maturity is similar to 'Kyoho' and 'Pione'. Shelf life is short, similar to 'Kyoho' and 'Pione'. The 'Sun Verde' vine is vigorous but seems to possess lower cold hardiness than 'Kyoho'. Flower cluster should be trimmed and berries thinned to obtain attractive fruit clusters as in most of the commercial cultivars in Japan. Cluster trimming and berry thinning require moderately long and medium time, respectively.

Queen Nina' is a tetraploid table grape cultivar released by the National Agriculture and Food Research Organization Institute of Fruit Tree Science (NIFTS) in Japan. It has large red berries, high soluble solids concentration, and low acidity. The berries can be converted to seedless ones by applying gibberellic acid to flower and fruit clusters in full bloom and again at 10 to 15 days after full bloom. 'Queen Nina' resulted from a cross of Akitsu-20 and 'Aki Queen' made in 1992 at Akitsu, NIFTS. Akitsu-20 is a hybrid selection of 'Benizuiho'×'Hakuho'. The original vine was initially selected in 2002 in a vineyard at Akitsu, and was tested as selection Akitsu-27 in 36 locations of 34 prefectures under the 11th Grape Selection National Trial initiated in 2004. It was ultimately selected, and released as 'Queen Nina' in 2009, and registered as No. 20733 under The Plant Variety and Seedling Act of Japan in 2011. The seedless fruit of 'Queen Nina' ripens in late August to early September at Akitsu. Its ripening time was 7 days and 4 days later than 'Kyoho' and 'Pione', respectively, in the national trial. Berry weight averaged 17.6 g in seedless fruit production at Akitsu. The berry has a mild foxy flavor, easy breakable, firm, and juicy flesh. Soluble solids concentration and titratable acidity averaged around 20.6% and 0.40 g/100ml, respectively in the national trial. Soluble solids concentration is significantly higher than in 'Kyoho' and 'Pione', whereas acidity is significantly lower than in those cultivars. Astringency of the flesh is not sensed. Some berry skin cracking has been observed depending on location and year. Berry set and the degree of shatter of berries from clusters at full maturity are similar to 'Kyoho' and 'Pione'. Shelf life is almost similar to 'Kyoho' and 'Pione'. The 'Queen Nina' vine is moderately vigorous and seems to possess lower cold hardiness than 'Kyoho'. Flower cluster should be trimmed and berries thinned to obtain attractive fruit clusters as in most of the commercial cultivars in Japan. Those modifications require moderately long and medium time to made, respectively, similar to 'Kyoho' and 'Pione'.