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- Title
Parâmetros genéticos e dissimilaridade entre progênies de cupuaçuzeiro (Theobroma grandiflorum, Malvaceae) oriundas de polinização livre no sudeste paraense.
- Authors
Alves, Edilene Oliveira; de Freitas, Carlos Batista Sousa; de Oliveira, Mariana Gomes; Silva, Murilo da Serra
- Abstract
The genetic diversity assessment can provide valuable information for conservation and genetic improvement programs, aiming to maximize the expression of traits of interest in production. In this context, the cupuaçu tree (Theobroma grandiflorum Malvaceae) stands out because it is a native tree of the Amazonia basin and its fruit, cupuaçu, is widely used in the production and sale of various foods. We performed the progeny test at the Instituto Federal de Educação Ciência e Tecnologia do Pará Campus Marabá Rural. The experimental design consisted of 200 genotypes distributed in randomized blocks, considering one plant per plot. The genotypes come from 10 progenies, with seeds derived from free pollination. We used silvicultural and morphological leaf characters to estimate genetic parameters and dissimilarity measures. Variance estimates indicated high individual heritability, with all characters showing values greater than 0.80. Accuracy estimates for all characters were greater than 0.90, providing high precision for potential selection. The results of the multivariate analysis suggest that the collar diameter contributed most to explaining the total variation in the analyzed material. The Tocher grouping method based on Mahalanobis genetic distances constituted eight dissimilarity groups, demonstrating genetic diversity for the observed characters. Based on the characters herein tested, we found genetic diversity in the progenies, with the potential for genetic conservation and selection.
- Subjects
GENETIC variation; GENE expression; GENETIC distance; MULTIVARIATE analysis; EXPERIMENTAL design
- Publication
Revista Verde de Agroecologia e Desenvolvimento Sustentável, 2024, Vol 19, Issue 1, p30
- ISSN
1981-8203
- Publication type
Article
- DOI
10.18378/rvads.v19i1.9752