Effects Of Different Rootstocks On Growth And Fruit Quality Of ’Tiangong Moyu’ And ’Tiangong Yuzhu’ Grapevine

Rootstocks play important roles in viticultural countries worldwide.Grafting grapevines onto resistant rootstocks is an effective way to improve berry quality and influence on the growth of scions.‘Tiangong Moyu’ is a new early ripening European-American hybrid grape cultivar with strawberry fragrance and strong resistance.But it has small berry weight and short shelf lifet.‘Tiangong Yuzhu’ is a new Eurasian early ripening cultivar with long oval shape,strong rose fragrance and excellent storage capacity.But it has the weak vigor,small the cluster weight and low yield.In this study,we focus on phenophase,vigor and fruit quality of ‘Tiangong Moyu’ grafted onto five rootstocks,including 1103 P,110R,5BB,SO4 and 3309 M.‘Tiangong Yuzhu’ grafted onto eight rootstocks,including 5BB,110 R,SO4,5C,Dogridge,3309 M,3309C,420 A and frequently-used rootstock Beta.It adopted comprehensive evaluation by principal component analysis,to select the most suitable rootstocks for ‘Tiangong Moyu’ and ‘Tiangong Yuzhu’ grapevine,overcome the defects of ‘Tiangong Moyu’ and ‘Tiangong Yuzhu’ in Zhejiang province,improve the quality of grape cultivars,to guide the production,and promote the healthy and sustainable development of the grape industry in Zhejiang.1.The results that five rootstock-scion combinations of ‘Tiangong Moyu’ and the self-root tree were analyzed by principal component analysis showed that the rank from high to low were: ‘1103P’> ‘110R’> ‘SO4’> ‘CK’> ‘5BB’> ‘3309M’.The comprehensive evaluation score of ‘1103P’,‘110R’ and ‘SO4’ is higher than self-root tree.‘1103P’ was the most suitable rootstock of ‘Tiangong Moyu’ in Zhejiang province.‘1103P’ rootstock-scion combination has delayed veraison period,increased berry weight,strong vigor,dark blue skin,better chewing taste,higher nutrient content.‘110R’ could advance the veraison period of ‘Tiangong Moyu’.‘1103P’,‘SO4’,‘5BB’ and ‘3309M’ could delay the veraison period of ‘Tiangong Moyu’.‘1103P’ and ‘110R’ could increase the berry weight of ‘Tiangong Moyu’.2.The results that eight rootstock-scion combinations of ‘Tiangong Yuzhu’ and the Beta stock-scion combination tree were analyzed by principal component analysis showed that the rank from high to low were: ‘5BB’ > ‘110R’> ‘SO4’> ‘5C’ > ‘Beta’ >‘Dogridge’ > ‘3309M’ > ‘3309C’> ‘420A’.‘5BB’,‘110R’,‘SO4’ and ‘5C’ have higher scores than Beta.‘5BB’ and ‘110R’ improve vine vigor,fruit appearance quality and nutrients of ‘Tiangong Yuzhu’.‘110R’ significantly increase cluster weight and yield of ‘Tiangong Yuzhu’.‘5BB’ and ‘110R’ could be used as suitable grafted rootstocks of ‘Tiangong Yuzhu’ in Zhejiang province.