Seedling emergence capacity and morphological traits are under strong genetic control in the resin tree Pinus oocarpa

doi:10.3832/ifor4397-017

Seedling emergence capacity and morphological traits are under strong genetic control in the resin tree Pinus oocarpa

Valerio Velasco-García Mario⁽¹⁾, Liliana Muñoz-Gutiérrez⁽¹⁾ , Gabriel Martínez-Cantera⁽²⁾

iForest - Biogeosciences and Forestry, Volume 17, Issue 4, Pages 245-251 (2024)
doi: https://doi.org/10.3832/ifor4397-017
Published: Aug 16, 2024 - Copyright © 2024 SISEF

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Pinus oocarpa is a widely distributed species essential for resin production in Mexico, where demand surpasses supply. This study aimed to identify differences and variation levels of seedling emergence capacity and morphological traits in resin-producing high-yield P. oocarpa trees and estimate their genetic control. Seeds from 72 open-pollinated families were planted using a randomized complete block experimental design. Differences between families were determined and pooled using cluster analysis. We recorded wide differences in seed emergence capacity and morphological traits (cotyledon number and length, and hypocotyl length), allowing to establish three family groups. We also calculated the contribution of the variation sources to the total variance and genetic parameters involved. Our data evidenced high genetic control for all tested variables. We found a moderate and positive genetic correlation between cotyledon length, cotyledon number, and hypocotyl length. We also found a high negative genetic correlation between emergence capacity and hypocotyl length. At the phenotypic level, we found a high and significant correlation between cotyledon length and number. Grouping P. oocarpa into families should aid decision-making for sexual propagation since a high propagation capacity of the high-yield trees is essential for genetic improvement programs. Moreover, we demonstrate that the heritability of the emergence capacity and other morphological traits is high; these traits can be useful for the early selection of high-yield families.

Keywords

Egg-cone pine, Cotyledons, Genetic Control, Genetic Correlation, Genetic Variation, Heritability

Authors’ address

(1)

0000-0001-8347-0523
0000-0001-5207-7665
National Institute on Forestry, Agriculture and Livestock Research, Progreso 5, Barrio de Santa Catarina, Coyoacán, 04010 Mexico City (Mexico)

(2)

Protector of Forests of the State of Mexico, Rancho Guadalupe Manzana 009, 52148 Llano Grande, State of Mexico (Mexico)

Corresponding author

Liliana Muñoz-Gutiérrez
gutierrez.liliana@inifap.gob.mx

Citation

Velasco-García Mario V, Muñoz-Gutiérrez L, Martínez-Cantera G (2024). Seedling emergence capacity and morphological traits are under strong genetic control in the resin tree Pinus oocarpa. iForest 17: 245-251. - doi: 10.3832/ifor4397-017

Academic Editor

Claudia Cocozza

Paper history

Received: Jun 01, 2023
Accepted: Mar 27, 2024

First online: Aug 16, 2024
Publication Date: Aug 31, 2024
Publication Time: 4.73 months

Open Access

This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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