A new early ripening flat nectarine cultivar ‘Zhongyoupan 5’

Abstract：Flat nectarine peach combine with flat shape and nectarine glabrous surface, more convenient and more beautiful color for consumer. There was only one local plat-nectarine cultivar in 80’s in 20 century in China. From that time, Flat-nectarine has been an important peach breeding objective in Zhengzhou Fruit Research Institute.‘Zhong Youpan 5’is an early ripening flat nectarine peach. It’s seeding was derived from a cross between‘99-7-14’and‘Zhen 1-3’in 2007. The female parent‘99-7- 14’is an advanced nectarine seeding, it come from‘Beijing 3-2’cross with‘Fire Pearl’. The male parent‘Zhen 1-3’is a good yellow flat nectarine superior line. The pollination was done in 2007. The seeding is gotten by embyro culture and raise seedling in greenhouse. All seedings were planted in open field with density of 1.0 m×4.0 m at the early of May in 2008. The advanced seeding‘07-3-38’was selected in 2011, then it is top-worked in Wenxian county in Henan province. It has a big size in early ripening varieties, average 130 g and the biggest reaches 200 g. The fruit is covered nearly 100% red flush. The SSC is more than 14.0%, and flavor is good with high sugar and low acid. The flesh is yellow, texture is half non-melting. Flower is pink, showy, pollen fertile. In Zhengzhou, the early blooming date period is in late March. Fruit ripens in later of June and the fruit development period is about 85-90 days. Compared to‘Jinxia Youpan’,‘Zhong Youpan 5’has earlier ripening date, and lighter cracking fruit. Summer and winter pruning management should balance stronger tree vigor. Heavy thinning flowers and young fruits are must be done to improve fruit quality. Fruit bagged is suggested to get more beautiful surface. It can been pick up until fruit well ripen in tree. It was gotten royal license in 2019.