Estimativas de parâmetros genéticos e a variabilidade em procedências e progênies de Handroanthus vellosoi

Camila Moreira Batista; Miguel Luiz Menezes Freitas; Marcela Aparecida de Moraes; Antonio Carlos Scatena Zanatto; Pedro César dos Santos; Marcelo Zanata; Mario Luiz Teixeira de Moraes; Alexandre Magno Sebbenn

doi:10.4336//2012.pfb.32.71.269

Estimates of genetic parameters and variability in provenances and progeny of Handroanthus vellosoi

Authors

Camila Moreira Batista Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira
Miguel Luiz Menezes Freitas Instituto Florestal
Marcela Aparecida de Moraes Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira
Antonio Carlos Scatena Zanatto Instituto Florestal
Pedro César dos Santos Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira
Marcelo Zanata Instituto Florestal
Mario Luiz Teixeira de Moraes Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira
Alexandre Magno Sebbenn Instituto Florestal

DOI:

https://doi.org/10.4336//2012.pfb.32.71.269

Keywords:

Ex situ conservation, Tropical tree species, Population genetics, Quantitative genetics

Abstract

The present study aimed at estimating genetic parameters and variability among and within provenances for silvicultural traits of Handroanthus vellosoi (Toledo) Mattos, in provenances and progenies test stands, located at the Luiz Antônio Experimental Station (São Paulo State, Brazil). The test was established in the compact family block design, with two provenances (allocated in the plots), six replicates and sub-linear plots of five plants, totalizing 35 progenies. Diameter at breast height (DBH), plant height, cylindrical volume, stem form and survival at 24 years of age were evaluated. Significant differences among the provenances were observed only to the trait stem form. The analysis of deviance showed significant differences among progenies for the joint analysis of the provenances (experimental population), suggesting that the population has high genetic variation and indicating the possibility of genetic improvement by selection of the best progenies. Heritability estimates in individual and family level ranged from low to moderate (26% for DBH, 32% for plant height, 24% for cylindrical volume, 27% for form and 36% for survival), confirming the possibility of genetic improvement by selection and that the provenances have potential to respond to the pressure of natural selection.

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Author Biography

Miguel Luiz Menezes Freitas, Instituto Florestal

Pesquisador Científico do Instituto Florestal de São Paulo, Coordenador do Grupo de Pesquisa em Conservação e Melhoramento Genético de Espécies Arbóreas, Chefe de Seção de Melhoramento Florestal, Professor da disciplina Conservação de Recursos Genéticos, no curso de pós-graduação da FEIS/UNESP. Tem experiência na área de Recursos Genéticos Florestais, atuando nos seguintes temas: genética de populações, genética quantitativa, melhoramento florestal, conservação genética e biologia molecular.

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Published

2012-09-28

How to Cite

BATISTA, Camila Moreira; FREITAS, Miguel Luiz Menezes; MORAES, Marcela Aparecida de; ZANATTO, Antonio Carlos Scatena; SANTOS, Pedro César dos; ZANATA, Marcelo; MORAES, Mario Luiz Teixeira de; SEBBENN, Alexandre Magno. Estimates of genetic parameters and variability in provenances and progeny of Handroanthus vellosoi. Pesquisa Florestal Brasileira, [S. l.], v. 32, n. 71, p. 269, 2012. DOI: 10.4336//2012.pfb.32.71.269. Disponível em: https://pfb.sede.embrapa.br/pfb/article/view/358. Acesso em: 27 apr. 2026.

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Issue

Vol. 32 No. 71 (2012): jul./set.

Section

Articles

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