Performance of ‘Valência’ sweet orange grafted on trifoliate orange hybrid rootstocks

Abstract

The objective of this work was to evaluate tree size, production, and fruit quality of ‘Valência’ sweet orange (Citrus sinensis) grafted on various trifoliate orange rootstocks, in order to select genotypes with a high performance. Twenty rootstock genotypes were evaluated, including trifoliate orange hybrids with mandarin (citrandarins) and with grapefruit (citrumelos), as well as ‘Rangpur’ lime. The experiment was implemented in the northwestern region of the state of Paraná, Brazil, in a 6.0×2.5 m spacing, in a sandy soil under subtropical and rainfed conditions. The statistical model used was the randomized complete block design with four replicates and four trees per plot. Tree size and fruit yield and quality were analyzed during three consecutive harvest seasons. Data were subjected to the analysis of variance, and means were grouped by the Scott-Knott test. Principal component analysis and agglomerative hierarchical clustering were also carried out. F.80-18, F.80-5, and F.80-3 citrumelos and IPEACS-239 citrandarin are adequate rootstock options for ‘Valência’ sweet orange, with dwarf trees and a high production efficiency. These rootstocks, except F.80-18, are also adequate options to obtain oranges with good industrial properties.

Genetic modulation of Valencia sweet orange field performance by 50 rootstocks under huanglongbing-endemic conditions

“…Work has been conducted over many years at several institutions to develop and evaluate superior new citrus rootstock cultivars, including at the United States Department of Agriculture (USDA) ( Wutscher and Bowman, 1999 ; Bowman and Rouse, 2006 ; Bowman et al., 2016b , Bowman et al, 2021 ), University of Florida ( Castle, 2010 ; Grosser et al., 2016 ; Grosser et al., 2020 ; Kunwar et al., 2021 ), University of California ( Bitters, 1986 ; Roose et al., 1989 ), Valencian Institute of Agricultural Research (IVIA) in Spain ( Forner-Giner et al., 2003 ; Forner-Giner et al., 2014 ; Martínez-Cuenca et al., 2016 ), CRA-Research Center for Citriculture and Mediterranean Crops (CRA-ACM; CREA) in Italy ( Russo and Reforgiato Recupero, 1984 ; Reforgiato Recupero et al., 2009 ), and in Brazil under the Brazilian Agricultural Research Corporation (EMBRAPA), The Sylvio Moreira Citrus Culture Center, Fundecitrus-IDR-Paraná, and University of São Paulo ( Cantuarias-Avilés et al., 2010 ; Costa et al., 2020a ; Costa et al., 2020b ; Soratto et al., 2020 ; Domingues et al., 2021 ). These efforts have involved a combination of testing rootstock clones already in existence (including those imported from other regions) and creating new clones by sexual hybridization between two parental species.…”