... focusly cultivate at Lai Vung - Dong Thap, Phung Hiep - Hau Giang, Tra On - Vinh Long, Cai Be - Tien Giang, Cang Long - Tra Vinh and scattered in some provinces (Do Minh Hien, 2008) [2]. 1.2 ... orange, Tau lime and Hanh). This result allows to propagate rapidly seedless Duong mandarin No. 1 and No.2 by grafting on 3 types of rootstock (Mat orange, Tau lime and Hanh), planted in regions ... and progeny scion grafting plants. - Three different cultural regions (Dong Thap, Can Tho, Vinh Long) in Mekong Delta. - In the period from 2007 to 2011. - Observation of plant morphological...