Resumen

MARTINEZ CANTERA, Gabriel; VELASCO GARCIA, Mario Valerio  y  AGUILAR MORALES, María Ascención. Growth and stem quality of Southern black pine provenances in Metepec, State of Mexico. Rev. mex. de cienc. forestales [online]. 2025, vol.16, n.92, pp.4-27.  Epub 06-Feb-2026. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v16i92.1582.

In Mexico, the Southern black pine (Pinus greggii var. australis) is widely used for timber plantations and reforestation, but it is necessary to assess its performance at specific sites in order to select superior genotypes. The objective of this research study was to determine differences among provenances in terms of growth and stem quality, as well as to evaluate their relationship with environmental variables. The assessment was conducted in a provenance trial of eight sources of Southern black pine, established in Metepec, State of Mexico. All variables showed significant differences among provenances (p≤0.0002), except for branch angle and diameter (p≥0.3558). The provenances El Madroño, El Cobre and El Pinalito exhibited the highest survival rates (69.57 to 79.54 %). La Parada, El Madroño, El Pinalito, El Cobre and La Cebada showed higher stem volume (115.1 to 134.6 dm3), periodic annual increment in diameter at breast height (1.83 to 2.14 cm), and in height (0.80 to 0.84 m). La Parada, Molango, El Madroño and La Cebada produced the straightest stems, whereas El Cobre, El Piñón and Ponthadó showed fewer growth units and branches. Growth variables were positively correlated with latitude (r≥0.711, p≤0.048), while the number of growth units and stem straightness were correlated with precipitation (r≥0.761, p≤0.028) and branch diameter was correlated with latitude and altitude (r≥0.714, p≤0.047). El Madroño is recommended for both reforestation and timber plantations due to its high survival, growth performance, and stem quality.

Palabras llave : Correlation; annual periodic increment; latitude; Pinus greggii Engelm. ex Parl. var. australis Donahue & Lopez Upton; stem straightness; survival.

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