The main fruit trees of Vietnam are orange, mandarin, lemon and pomelo trees that have a long history of development and have been planted throughout the ecoregions nationwide. In the past many decades, citrus fruit remains one of the key export products and demand of domestic consumption is very large (Hoang Ngoc Thuan, 2004). The study of development of citrus fruit trees in our country had been officially developed since the 30s of the previous century. Increasingly, domestic and foreign authors are interested in research and development of orange trees and mandarin trees in Vietnam.