Abstract

CEGELSKI, Leandro E.; BELTRAN, Víctor M.; GAIAD, José E.  and  LUACES, Paula Alayón. Evaluation of parameters for the propagation of three new hybrid citrus rootstocks of potential commercial use. Bonplandia [online]. 2021, vol.30, n.2, pp.191-202. ISSN 0524-0476.  http://dx.doi.org/10.30972/bon.3025105.

The rootstocks are an important section of the woody fruit scions, are key at the planification of the field because it influence on the precocity, pest and disease tolerance and on the vigor of the plants. At the INTA EEA Bella Vista there are adult trees of hybrids that are in full production but have not yet been evaluated as potential rootstocks for the NEA citrus sector. The objective of the work was to evaluate properties for the propagation of three hybrid citrus rootstocks with potential commercial use. Characteristics of mother trees and fruits, polyembryony, and seedling behavior were evaluated. Also, after 0, 45, 90 y 180 days of storage, germination percentage and energy were measured in eighteen plants from three hybrids: 1) ‘Cleopatra’ mandarin (Citrus reshniHort ex Tan.) × trifolio (Poncirus trifoliata(L.) Raf.) (Cl×Tf), 2) ‘Citrange Troyer’ (C. sinensis(L.) Osbeck) × trifolio (P. trifoliata(L.) Raf.) × tangerina (Citrus deliciosaTen.) (T×C) and 3) sour orange (Citrus auratiumL. × ‘Cleopatra’ mandarin (Citrus reshniHort ex Tan.) (Ag×Cl). The smallest plants in the field were that coming from Ag×Cl hybrid. The T×C combination has a good amount of seeds and its storage behavior ensures good germination until after 180 days of harvest. The Cl×Tf hybrid was the latest to germinate, but the high presence of polyembryony ensures the obtaining of nucelar plants in nursery.

Keywords : Citrus; fruits; NEA; rootstocks.