Abstract

CHABBAL, M.D. et al. Calidad de frutos y maduración en naranjo dulce ‘Valencia Late’ [Citrus sinensis (L) Osbeck] cv Limeira, sobre diferentes portainjertos. RIA. Rev. investig. agropecu. [online]. 2019, vol.45, n.1, pp.67-73. ISSN 1669-2314.

In order to respond the demands of world markets, the constantly searching of rootstocks is required. The aim of this study was to characterize plants of sweet orange ‘Valencia Late’ [Citrus sinensis (L.) Osbeck] grafted on 17 rootstocks in Entre Rios, Argentina, according to fruit quality and early harvest. In a completely randomized design with six replications, combinations of sweet orange ‘Valencia Late’ with 17 rootstocks were tested. At harvest time, on 15 randomly selected fruits, following variables: equatorial diameter, rind thickness, juice percentage, soluble solids and titratable acidity were determined, and maturity index was calculated. By Principal Component Analysis, Biplot graphic, Multivariate Analysis of Variance, the 17 rootstocks studied were classified into four groups according with the early harvest. The earliest group was characterized by fruits with larger diameter, high maturity index and contents of total soluble solids and lower acidity; the second one present fruits with high percentages of juice and soluble solids content, but also higher titratable acidity; the third one contains fruits with the largest shell thicknesses, the lowest values of percentage of juice, total soluble solids and titratable acidity and intermediate values for maturity index and equatorial diameter; the last one is characterized by fruits with higher titratable acidity, lower values of index of maturity and equatorial diameter and intermediate values in other variables.

Keywords : citrus; precocity; multivariate analysis.