Pilot Study on Wine Quality of a New Wine Grape Cultivar‘Yewang 20'With Cold Resistance

‘Yewang-20'(Vitis vinifera,V.amurensis)is a new wine grape cultivar with cold resistance.In this study,the quality of its wine with small-amount winemaking was evaluated preliminarily with determination of chemical indexes and sensory evaluation,which was also compared with wines made from other grape cultivars.The results showed that the content of alcohol(13.99%),soluble solid(7.11°Brix)and reducing sugar(3.19g/L)in its wine showed‘Yewang-20'was appropriate for brewing dry red wine.And the total phenolic content(1 127.96 mg/L)of its wine was rich,especially,the anthocyanin content(109.28mg/L)was significantly higher than that of other wines.However,the total acid content(10.67g/L)of its wine was high,which attributed the more contents of tartaric acid(4.54g/L)and malic acid(1.04g/L)from its composition of organic acids.In the respect of sensory quality,the appearance of its wine was prominent,but the aroma,sour,balance,body of its wine performed poorly.The results above indicated,in order to improve the integral quality,the vinification of‘Yewang-20'should be first studied in the following aspects:reducing acidity,increasing tannin and improving aroma.In future,‘Yewang-20'could be promoted as an advantageous wine grape cultivar in the cold regions of China.