Genetic divergence among progenies of Pinus caribaea var. caribaea under quantitative characters

Authors

  • Janete Motta da Silva Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Engenharia de Ilha Solteira
  • Ananda Virgínia de Aguiar Embrapa Florestas
  • Edson Seizo Mori Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Engenharia de Ilha Solteira
  • Mario Luiz Teixeira de Moraes Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Ciências Agronômicas, Departamento de Produção Vegetal

Keywords:

Genetic parameters, Genetic divergence, Tropical pines, Progeny trial

Abstract

The objective of this research was to quantify the genetic dissimilarity among P.caribaea var. caribaea progenies to identify divergent parents aiming to generate highly productive genotypes and to evaluate the total variability by phenotypic characters of commercial importance. The progeny trial of P. caribaea var. caribaea was set up through 10 x 10 triple lattice design, with 99 progenies and a commercial control in Selvíria, MS, Brazil. We have evaluated quantitative characters before and after thinning procedures such as: total plant height (m), diameter at breast height (dbh) (cm); wood volume  (m3 tree-1), stem form, wood density at dbh and wood density at the middle of the total height of tree stem (g cm-3), and survival of progenies (%). There was low genetic divergence among P. caribaea var. caribaea progenies. The diameter at breast height was the character that most contributes to genetic diversity among progenies, for both before and after thinning. The information of Mahalanobis distance and the clustering of progenies by Tocher's method will be important to define the future strategies for breeding programs and genetic conservation of the species.

 

doi: 10.4336/2012.pfb.32.69.69

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Author Biographies

Janete Motta da Silva, Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Engenharia de Ilha Solteira

Doutora em Agronomia pela Faculdade de Engenharia, UNESP, Ilha Solteira-SP.

Ananda Virgínia de Aguiar, Embrapa Florestas


Edson Seizo Mori, Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Engenharia de Ilha Solteira

Prof. Adjunto, Departamento de Produção Vegetal, Faculdade de Ciências Agronômicas, UNESP, Botucatu, SP, Brasil.

Mario Luiz Teixeira de Moraes, Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Ciências Agronômicas, Departamento de Produção Vegetal

Prof. Adjunto, Departamento de Fitotecnia, Tecnologia de Alimentos e Sócio-Economia; Faculdade de Engenharia, UNESP, Ilha Solteira, SP, Brasil.

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Published

2012-03-21

How to Cite

SILVA, Janete Motta da; AGUIAR, Ananda Virgínia de; MORI, Edson Seizo; MORAES, Mario Luiz Teixeira de. Genetic divergence among progenies of Pinus caribaea var. caribaea under quantitative characters. Pesquisa Florestal Brasileira, [S. l.], v. 32, n. 69, p. 69, 2012. Disponível em: https://pfb.sede.embrapa.br/pfb/article/view/194. Acesso em: 19 apr. 2025.

Issue

Vol. 32 No. 69 (2012): jan./mar.

Section

Articles

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