Resumo

MUNOZ FLORES, Hipólito Jesús et al. Morphological variation in highly resin-producing seeds of Pinus pseudostrobus Lindl. Acta univ [online]. 2023, vol.33, e3549.  Epub 14-Ago-2023. ISSN 2007-9621.  https://doi.org/10.15174/au.2023.3549.

The analyzes of cones and seeds allow to evaluate the physical and biological characteristics of a lot of seeds and to determine the quantity and quality of seed produced in forest germplasm production units. The objective of this study was to determine the morphological variation and seed germination of 48 resin families of Pinus pseudostrobus Lindl., distributed in three altitudinal gradients, natural forests of the Indigenous Community of Nuevo San Juan Parangaricutiro, Michoacán. The evaluated variables were: width, length, weight and germination, number of seeds per kilogram, and moisture content of the seed. The results showed significant differences (p ≤ 0.05) between gradients and between families in the variables. The size, weight of seed, and germination percentages were higher in gradients 1 and 2 (2200 m. a. s. l.-2400 m. a. s. l. and 2401 m. a. s. l.-2600 m. a. s. l.); in number of seeds there is a statistical difference (p ≤ 0.05) between families in each gradient with 35 760 to 108 966 seeds (kg-1).

Palavras-chave : Genetic improvement; altitude gradient; germination; seed weight.

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