What is the best tree to graft yellow fruit?

Mainly produced in Xingyi City, Guizhou Province, it is a sweet orange variety with early and medium maturity. It is named after the local common name sweet orange is yellow fruit. Most of them are distributed in river valleys and mid-level platforms at an altitude of 750 ~ 1 100 meters. The temperature in the producing area is relatively high, with an annual average temperature of16.1~18.2℃ and an annual accumulated temperature of ≥ 10℃ of 4933 ~ 6033℃. The relative humidity is about 82%, the annual precipitation is more than 1 150 mm, and the soil is purple sandy soil and yellow soil, with good surface structure, deep and fertile soil layer and rich potassium. The produced yellow fruit is spherical or oblate, with a longitudinal diameter of 6.25 cm, a transverse diameter of 7.4 1 cm, an average fruit weight of 179.65 g, an orange-red or orange-red peel, well-developed oil cells and bright and clean color. The pericarp is 0.47 cm thick and the nucleus is small. Half full, soft center, petals easy to peel off. The pulp is tender and slag-melting, sweet and sour, thin skin, juicy, fruity and slightly fragrant. Edible parts account for 66 ~ 72% of the whole fruit weight. Every 100 ml of fruit juice contains 6.00 ~ 8.89 grams of sugar. 0.5 ~ 1.26g acid and 9.0 ~ 12.0% soluble solids. Guo Huang is mainly eaten fresh, and it can also be made into fruit juice and drinks. According to the Records of Xingyi County, Guo Huang has been planted in Xingyi area for more than 350 years.

Huanglong Guo Huang in Xingyi area has the best quality. Qinglong sweet orange is characterized by huge fruit, thin and soft skin, golden color, ignorance and sweetness, moderate sweetness, refreshing fragrance, more juice and fewer seeds, and storage resistance. It is a good product for promoting digestion and regulating the stomach. There are many kinds of sweet oranges in Qinglong, including sweet orange, summer orange, navel orange, cotton orange and blood orange.