Genetic parameters, selection gains and associations between characters of Carya illinoinensis using mixed models

Authors

  • Liana Carine dos Santos del Valle Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Caroline Farias Barreto Instituto de Desenvolvimento Educacional de Caxias do Sul, Faculdade IDEAU, Rua Sinimbú, no 1.670, Centro, CEP 95020-001 Caxias do Sul, RS.
  • Diógenes Cecchin Silveira Universidade Federal do Rio Grande do Sul, Faculdade de Agronomia, Departamento de Plantas Forrageiras e Agrometeorologia, Avenida Bento Gonçalves, no 7.712, CEP 91540-000 Porto Alegre, RS.
  • Carlos Roberto Martins Embrapa Clima Temperado, BR-392, Km 78, 9° Distrito, Monte Bonito, Caixa Postal 403, CEP 96010-971 Pelotas, RS.
  • Roseli de Mello Farias Universidade Estadual do Rio Grande do Sul, Avenida Presidente Tancredo Neves, no 210, Piraí, CEP 97670-000 São Borja, RS.
  • Marcelo Barbosa Malgarim Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.

Keywords:

genetic correlation, pecan, productivity, selection

Abstract

The objective of this work was to estimate the genetic parameters of pecan (Carya illinoinensis) cultivars through mixed model analyses of data on vegetative growth, fruit production, and fruit quality traits. The study was conducted from 2021 to 2023, using the Barton, Desirable, Elliot, Mohawk, Jackson, Shoshoni, Stuart, and Success pecan cultivars, in the municipality of Santana do Livramento, in the state of Rio Grande do Sul, Brazil. The experimental design was completely randomized. Each replicate was composed of ten plants, totaling 80 plots. Nut vegetative growth, production, and quality were evaluated. The influence of the genotype x environment interaction on production traits and nut quality was confirmed. However, these effects were not observed on vegetative growth. Production per plant and productivity per hectare exhibited positive correlations with production efficiency in relation to canopy volume. For the vegetative and production traits, broad-sense individual heritability is low, suggesting a strong environmental influence. However, for the fruit quality traits, heritability is medium to high, indicating a greater genetic contribution and, therefore, a greater potential for response to selection.

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Published

2024-12-16

How to Cite

del Valle, L. C. dos S., Barreto, C. F., Silveira, D. C., Martins, C. R., Farias, R. de M., & Malgarim, M. B. (2024). Genetic parameters, selection gains and associations between characters of <i>Carya illinoinensis</i> using mixed models. Pesquisa Agropecuaria Brasileira, 59(AB), e03777. Retrieved from https://apct.sede.embrapa.br/pab/article/view/27854

Issue

V.59, Jan./Dec., 2024 :Continuos publication

Section

GENETICS