Resumen

PEREZ-LUNA, Alberto et al. Survival of grafts of three Pinus species with two techniques and two healing methods. Rev. mex. de cienc. forestales [online]. 2023, vol.14, n.76, pp.50-70.  Epub 19-Jun-2023. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v14i76.1315.

Grafting is the most widely used vegetative propagation method in conifers to clone superior genotypes of forest species. The objective of the present study was to evaluate the effect of two grafting techniques (terminal cleavage and side veneer) and two healing methods (natural and application of healing wax) in three economically important species in Durango: Pinus engelmannii, P. cooperi, and P. durangensis. The experiment was established using a randomized complete block design with a 3×2×2 factorial arrangement and nine replications. Final survival was assessed at 180 days. The effect of individual treatments and their interactions was determined with Kruskal-Wallis, Dunn, and Dunnett tests. Significant differences (p<0.05) were obtained; the highest survival rate for P. engelmannii was 32.9 %, 16.3 % with side-veneer grafting, and 16.9 % with the use of healing wax. The double interactions between species and grafting technique, and between species and healing method showed significant differences (p<0.05), in addition to the triple interaction. The highest survival values were observed in side-veneer and terminal-cleft grafts of P. engelmannii, with 40 and 25.8 %, respectively, as well as in the grafts of P. engelmannii with wax application, whose value was 43.3 %. The best triple interaction was that of side-veneer grafts of P. engelmannii with healing wax (50 %). P. engelmannii responded best to grafting. For P. cooperi and P. durangensis, it is recommended to search for alternative grafting techniques.

Palabras llave : Healing wax for grafting; cloning of superior genotypes; grafting of pines; side-veneer grafting; terminal-cleft grafting; vegetative propagation.

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