AUTOECOLOGY, DIVERSITY, AND INTERNAL GENETIC STRUCTURE OF Ocotea porosa (NEES & MART.) BARROSO: SUBSIDIES FOR SEED COLLECTION

Authors

  • Igor de Carvalho Aguiar Rodrigues Universidade Federal de Santa Catarina, Mestre em Recursos Genéticos Vegetais, Florianópolis, SC - Brasil
  • Giulia Fabrin Scussel Universidade Federal de Santa Catarina, Mestre em Recursos Genéticos Vegetais, Florianópolis, SC - Brasil
  • Alison Bernardi Universidade Federal de Santa Catarina, Doutor em Recursos Genéticos Vegetais, Florianópolis, SC - Brasil
  • Peggy Thalmayr Instituto de Biologia Subtropical, Misiones - Argentina
  • Juliana Machado Ferreira Universidade Federal de Santa Catarina, Programa de Pós-Graduação em Recursos Genéticos Vegetais, Florianópolis, SC - Brasil
  • Ana Kelly de Sousa Silva de Carvalho Universidade Federal de Santa Catarina, Programa de Pós-Graduação em Recursos Genéticos Vegetais, Florianópolis, SC - Brasil
  • Adelar Mantovani Universidade Federal de Santa Catarina, Departamento de Engenharia Florestal, Lages, SC - Brasil
  • Maurício Sedrez dos Reis Universidade Federal de Santa Catarina, Departamento de Agricultura Biodiversidade e Floresta, Curitibanos, SC - Brasil
  • Tiago Montagna Universidade Federal de Santa Catarina, Departamento de Fitotecnia, Florianópolis, SC - Brasil

Keywords:

Araucaria Forest, Ecological restoration, Spatial genetic structure

Abstract

Ecological restoration mitigates the negative effects of fragmentation and habitat loss. This practice allows the conservation of key species, such as Ocotea porosa, a tree native to the Araucaria Forest and extremely endangered. A key point in restoration projects is the source of seeds, as well as guidelines for collection. When carried out under technical criteria, the collection allows the maintenance of genetic diversity and adaptive potential in restoration plantations. Given the importance of seed source, genetic diversity, and adaptive potential, this study aimed to define areas and criteria for collecting seeds by characterizing the demography, genetics, and reproductive phenology of an O. porosa population. A plot of 16 hectares was installed in the municipality of Passos Maia, Santa Catarina, Brazil, and a demographic survey of trees with diameter at breast height (DBH) > 15 cm was carried out. Indices of diversity and internal genetic structure (IGS) were estimated using allozyme markers. The reproductive phenology of 67 individuals was evaluated during 8 months. The studied population showed a high density of individuals (10.7 ind. ha-1) with normal diametric distribution. The phenological pattern of the species is regular, seasonal, and annual. The evaluated population showed high genetic diversity, high fixation index, and significant IGS up to 80 meters away. Based on these results, the evaluated fragment can be used as a seed collection area. It has high genetic diversity, density, and area size sufficient to contain several demes. In addition, it is highly recommended that the matrices be at least 80 meters apart to avoid the effects of significant IGS.

Keywords: Araucaria Forest; Ecological restoration; Spatial genetic structure

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Published

2023-12-04

How to Cite

Rodrigues, I. de C. A., Scussel, G. F., Bernardi, A., Thalmayr, P., Ferreira, J. M., de Carvalho, A. K. de S. S., Mantovani, A., dos Reis, M. S., & Montagna, T. (2023). AUTOECOLOGY, DIVERSITY, AND INTERNAL GENETIC STRUCTURE OF Ocotea porosa (NEES & MART.) BARROSO: SUBSIDIES FOR SEED COLLECTION. Revista Árvore, 47, https://doi.org/10.1590/1806–908820230000030. Retrieved from https://revistaarvore.ufv.br/rarv/article/view/263572

Issue

Revista Árvore, Viçosa-MG, v.47, 2023

Section

Nature Conservation

License

All authors agreed to submit the work to Revista Árvore and granted the exclusive license to publish the article. The authors affirm that it is an original work and has not been previously published elsewhere. The scientific content and opinions expressed in the article are the sole responsibility of the authors and reflect their opinions, not necessarily representing the opinions of the editorial board of Revista Árvore or of the Society of Forest Investigations (SIF).

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