A new red-fleshed kiwifruit cultivar Huahong 4

Abstract: Huahong 4 is a new tetraploid redfleshed kiwifruit cultivar selected from a crossbreeding. The seedling was derived from a cross between Jinshi 2 and SF0835M in 2009 at Shifang Kiwifruit Base of Sichuan Province. Fine female vines were selected in 2015, grafted and propagated in 2016 and started to be observed. Varieties were selected and applied for variety rights protection in 2019. It is a tetraploid female variety with medium tree vigor, medium short villi on current canes and weak anthocyanin coloration on growing tips, short fusiform lenticels on canes and small yellow lenticels on young leaf petiole with adaxially anthocyanin staining, acuminate leaf tip, heart-shaped base and heart-shaped leaves. The inflorescence type is single, the anthocyanidin staining degree is weak at the calyx crack of the petal base. the base of the petal is arranged and overlapped, the crease of the top is very light, the color of the adaxial side is monochrome and mainly white, the color of the filament is light green, the color of the anther is orange-yellow, and style color is white and it stays at a horizontal state, with each flower having average of 40 styles. Fruit shape is oval, with a slightly blunt and convex beak shape. The calyx ring of the fruit is obvious, and the base of the fruit is circular. There are no persistent sepals, and the degree of protrusion of the lenticels is weak. The skin is light brown, with a moderate amount of short hairs evenly distributed on the surface of the skin. The color is yellow-brown and it is easy to fall off. After ripening, the skin of the fruit is light brown, and the difficulty of peeling off the skin is moderate. The outer flesh is light green, while the inner flesh is purple red. The average fruit weight is 83.7 g, and maximum fruit weight is 104.3 g. Soluble solids content is 15.2%, and dry matter content is 16.6%.Fruit contents 7.95% total sugar, 1.56% total acid and 1.60 g∙kg-1 vitamin C. The fruit development period is 150 d, it matures in mid-September in Deyang area of Sichuan province and it’s a mid-mature variety. The inflorescence belongs to a single inflorescence type, and the budding ability and cane branching ability are strong. It is medium resistant to PSA, and the occurrence of brown spot and scale insects is slight. The resistance and adaptability is strong. The fruit has long storage-life, and cold storage life is 120-140 days. The conditions of suitable cultivation area include annual average temperature >15 ℃, altitude below 1000 meters, and slightly acidic and good drain soil. It can start to flower and bear fruit in the third year with good yield.