A new Fortunella crassifiolia cultivar 'Cuimi Kumquat'

Abstract:'Cuimi Kumquat'is a new cultivar which selected from the individual plant of bud mutation of 'Huapi Kumquat' (F.crassifiolia) in 2007 at the orchard.It was initially selected in 2007 for its large fruit, less pulp oil cell, sweet taste, more juice, and few seeds or seedless.Through from the individual plant ofbud mutation of 'Huapi Kumquat'collected scion, grafting was reproduced planting stock.After regionaladaptability testing at three sites, including Heli village, Rongan county, Forestry Bureau Nursery Fieldand Datan village, Liuzhou city over six years from 2008 to 2013, it was finally selected in 2014.This spe-cies is a dwarfing tree, attaining a height of 3-5 m.The tree is vigorous with globe shaped crown and uprighttree gesture.Branches are long.Leaves are obovate, blunt tip, 4.5-9.5 cm long, 2.5-6.5 cm wide, leaf mar-gin entire.Flower is white, 5.6-6.9 mm across, pedicel no villous.Branches of young tree are born 5 times ayear, adult tree are born 3 times a year.Fruit branches are spring shoots, late spring shoots and summershoots.The fruit shape is the oval, skin color golden yellow to orange red, skin smooth, very few oil cell, pulp yellow white color, texture crisp, taste sweet, no spicy taste, more juice, few seeds or seedless, weight20.5 g on average, the largest 35.6 g, fruit shape index of 1.1.Juice rate of 56.9%, edible rate of 99.33%, ta-tol soluble solids content of 23.65%, total sugar of 16.46%, titratable acid of 0.18%, sugar-acid ratio of91.4, vitamin C of 445 mg·kg-1 et al.Quality is excellent.The fruit development period is 160 days to 180 days, and it matures at the late November to the middle December, germination period in early April, flower-ing period in early June to early July on Rong'an county in Guangxi province (north latitude 24°46' to 25°34', east longitude 109°13' to 109°47') .It is resistance to drought, hardy and desert, etc.And resistance to Citrus canker disease, Citrus decline disease and Huanglong disease, etc.The fruit has very long storage-life, cold storage life is 6 months and shelf life is over 90 days.Suitable cultivation area is the kumquat cultiva-tion area.This variety can bear fruits next year after planted, has high yield potential.Orchard shouldchoose red soil which is slope, or flat, and has ability of moisture and fertilizer retention.Spacing betweenrows are 3 m×4 m.When spring shoots turn green, based on the degree of strong and weak of tree vigor, treetrunk ring cut 1-2 times, each time 1-2 laps.Flowering sprayed BA+GA 800 times at a time.In early No-vember, canopy covers film, in order to prevent the dehiscent fruit, or fruit drop, and delayed harvest.