A new Citrus cultivar ‘Gui Wild Shanjingan'

Abstract: ‘Gui Wild Shanjingan'is a new citrus cultivar found in Luohua mountain of Pingfeng village, Malu town, Dongxing city, Guangxi Zhuang Autonomous Region. It belongs to Rutaceae family and HongKong kumquat (Fortunella hindsii Swingle) . Since 2013, through three years investigation on its botanicaland biological characteristics and fruit quality, we found that its genetic traits were stable. SSR molecularmarkers were performed on the plant materials of‘Gui Wild Shanjingan'and 6 other citrus varieties to an-alyze their phylogenetic relationship. The results showed that‘Gui Wild Shanjingan'was a new citrus cul-tivar with specific bands which was different with the other tested cultivars, and it was reviewed and approved by the Guangxi Committee of Corp Variety Registration in June 2015. This species is a dwarfingshrub tree. The tree is low-vigorous with spheroid crown and upright tree gesture. The trunk present grey-brown color, branches are slender and dense with few spines. Leaf is long elliptic, 6.27 cm long, 1.90 cmwide, apex acute, margin smoothly, surface dark green. Complete flower is white with a small size, it has 5petals with ligulate shape, 5 pieces of sepals. Fruit is mainly round, has yellow peel and light ware surface.The average fruit weight is 4.50 g; The average transverse diameter is 20.3 mm and the average longitudinal diameter is 19.8 mm, fruit shape index is 0.98. 1-7 seeds per fruit, the oval-shaped and monoembryonic seeds contain deep green cotyledon. The proportion of pulp is less with lacking in juice and acid-bittertaste. The edible rate is 87.1%, the average total soluble solids content is 10.6%, the titratable acid contentis 4.50%, and vitamin C is 374.0 mg·L^-1. The fruit matures from early November to January of the nextyear in Dongxing area. Adult result tree germinate in early April every year, periodic flower bud differentia-tion with different growth potential of spring shoots. The flowering time is in the early June, and occurredmultiply. It can bear fruit several times throughout one year. It is resistant to drought and cold, tolerant tomost disease, especially to canker. Pot culture or orchard should choose neutral sandy soil which is flat andhas ability of moisture and fertilizer retention; base fertilizer should be applied enough in winter; pruningincludes pinching, bending and back spune, aiming at controlling tree size and maintaining tree vigor.‘Gui Wild Shanjingan'can overcome nucellus embryo obstacle to be a model plant of the fruit trees because of the characteristics of single embryo and short juvenile period. So it has the potential value in cit-rus breeding and genomic research. Its root, leaf and fruit also can be used as medicine.