DWARFING ROOTSTOCKS FOR 'VALENCIA' SWEET ORANGE
The Brazilian and other citrus industries will likely require, among other technologies, the use of rootstocks that are suitable for higher planting densities with high production efficiency of high quality fruits and tolerant to abiotic and biotic stresses. Considering this approach, hybrid rootstocks have been obtained by the Citrus Breeding Program of Embrapa Cassava & Fruits, in Cruz das Almas, Bahia State, Brazil. One experiment evaluating the first three commercial crops of Valencia sweet orange budded on several rootstocks in Colômbia, São Paulo State, Brazil, indicated that the hybrids TSKC (Sunki mandarin) × [LCR (Rangpur lime) × TR (trifoliate orange)]-059, TSKC × CTSW (Swingle citrumelo)-033, TSKC × CTSW-041, LCR × TR-001, HTR (trifoliate hybrid)-051, HTR-053 and HTR-069 allowed planting densities higher than those attained with the use of the traditional rootstocks Rangpur lime and Sunki mandarin. They also induced higher production efficiency of fruits with higher or equivalent quality in comparison to fruits on Rangpur lime, which is the usual rootstock in Brazil. Additionally, TSKC × (LCR × TR)-059 and LCR × TR-001 induced high tolerance to drought, with results similar to Rangpur lime, and the first hybrid also induced early fruit bearing of the scion variety. In spite of not being dwarfing rootstocks, the hybrids TSKC × CTTR (Troyer citrange)-002 and TSKC × CTSW-028, as well as Rangpur lime selection CNPMF-003, Sunki Tropical mandarin and Indio and San Diego citrandarins performed well.
Yuri C. Ramos, , Eduardo S. Stuchi, , Eduardo A. Girardi, , Helton C. de Leão, , Abelmon da S. Gesteira, , Orlando S. Passos, and Walter dos S. Soares Filho, (2015). DWARFING ROOTSTOCKS FOR 'VALENCIA' SWEET ORANGE. Acta Hortic. 1065, 351-354
Citrus spp., Poncirus trifoliate, drought tolerance, hybridization, production, tree size