Field Trials to Assess the Growth, Survival, and Stomatal Densities of Five Mexican Pine Species and Their Hybrids under Common Plantation Conditions

Understanding hybridization is important for practical reasons, as the presence of hybrid trees in seed stands can influence success natural regeneration and reforestation. Hybridization creates new gene combinations, which promote or enhance adaptation to changing environments. In present research, we aimed, first time, evaluate compare growth survival 541 putative seedlings 455 pure parental Pinus arizonica, P. durangensis, engelmannii, leiophylla, teocote, two reciprocal trials duration 27 months Sierra Madre Occidental (SMO), Durango, Mexico. We also examined possible correlation between needle stomatal density seedling survival. The overall analysis data showed that mean height apical bud was significantly higher (p = 0.01) hybrids than trees. Considering both trials, rate arizonica 0.002) durangensis parameters were correlated with < 0.01). Stomatal at stand level positively hybrids, but not summary, generally exhibited same ability species (or sometimes a greater ability) withstand weather conditions, survive, grow effectively trials. systematic use pine Mexico could therefore be considered option sustainable management component adaptive silviculture.