Relação entre crescimento, canais resiníferos e produtividade de goma-resina em Pinus caribaea var. hondurensis Barr. & Golf.

Lavínia Barbosa Oliveira; Lais Lara Jesus Barros Freitas; Adriene de Oliveira Bastos; Adelson Lemes da Silva Júnior; Fabio Akira Mori; Lucas Amaral de Melo

doi:10.53661/1806-9088202650264088

Authors

Lavínia Barbosa Oliveira Universidade Federal de Lavras, Programa de Pós-graduação em Engenharia Florestal, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0001-5582-0282
Lais Lara Jesus Barros Freitas Universidade Federal de Lavras, Programa de Pós-graduação em Engenharia Florestal, Lavras, Minas Gerais, Brasil https://orcid.org/0009-0005-4755-0530
Adriene de Oliveira Bastos Universidade Federal de Lavras, Programa de Pós-graduação em Engenharia Florestal, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0003-3720-8502
Adelson Lemes da Silva Júnior Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0003-0940-8398
Fabio Akira Mori Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0002-7468-018X
Lucas Amaral de Melo Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0001-5219-9179

DOI:

https://doi.org/10.53661/1806-9088202650264088

Keywords:

Forest breeding, Progeny, Phenotypic variability

Abstract

The genus Pinus has broad economic relevance in Brazil, both for timber production and for oleoresin extraction, an activity in which the country ranks among the world’s leading producers. Pinus caribaea var. hondurensis Barr. & Golf. is one of the tropical species with the greatest potential for multiple uses, distinguished by its vigorous growth and resin-producing viability. This study aimed to evaluate its growth in diameter at breast height (DBH), the number of resin canals (NRC), gum resin productivity (GRP), and the relationship among these traits in 31 half-sib progenies of this species, aiming to identify materials with potential for breeding programs. The experiment was established in a randomized complete block design, with thirty replications and one plant per plot, in Lavras, Minas Gerais state, Brazil. For the evaluation of DBH (cm), NRC, and GRP (kg tree⁻¹), only three replications were considered in this study, with DBH and NRC assessed at eight years and GRP at nine years after planting. The data were subjected to analysis of variance (ANOVA) and the Scott-Knott test (p < 0.10), in addition to Pearson correlation analysis. The results revealed significant phenotypic variability among the progenies for all the analyzed traits. The superior progenies were identified for DBH, NRC, and GRP, highlighting the potential for genetic gains. The correlation between DBH and NRC was moderate (0.74), while correlations with GRP were low (<0.32), indicating its multifactorial nature. The study demonstrates phenotypic variability among progenies and low correlation among the evaluated traits, indicating the need for independent selection strategies to maximize gains in a breeding program.

Keywords: Forest breeding, Progeny, Phenotypic variability