MORPHOLOGICAL DESCRIPTORS FOR THE CHARACTERISATION OF TEAK CLONES CUTTINGS (Tectona grandis L.F.)

Authors

  • Jorge Luis Reategui-Betancourt Universidade de Brasilia, Departamento de Ciências Florestais, DF - Brasil
  • Daniele Aparecida Alvarenga Arriel Universidade Federal de Uberlândia, Instituto de Ciências Agrarias , Monte Carmelo, MG - Brasil
  • Sidney Fernando Caldeira Universidade Federal de Mato Grosso, Faculdade de Engenharia Florestal, Cuiabá, MT - Brasil
  • Antonio Rioyei Higa Universidade Federal do Paraná, Departamento de Ciências Florestais, Curitiba, PR - Brasil
  • Rudmilla Menezes Marques Universidade Federal de Mato Grosso, Faculdade de Engenharia Florestal, Cuiabá, MT - Brasil
  • Irivan dos Santos Gonçalves Proteca- Biotecnologia Florestal Ltda, Cuiabá, MT - Brasil
  • Diego Tyszka Martinez Universidade Federal do Paraná, Departamento de Ciências Florestais, Curitiba, PR - Brasil

Keywords:

Cultivar protection, Distinguishability, Similarity

Abstract

Teak (Tectona grandis) is a forest species cultivated in tropical regions worldwide, due to the traits of its wood and its great economic value on the market. In Brazil, original plantations are being replaced by selected clonal forests, which generate the need and interest to protect this genetic material based on the current legislation. The legal requirements for cultivar protection are that the genotype must result from genetic improvement and provide distinguishability, homogeneity, and stability (DHS). This work identifies morphological descriptors in teak cuttings to assist the clone protection process of the species. The study was conducted in a completely randomized design with the evaluation of 7 clones and 15 cuttings per clone, at 30, 60, 90, and 120 days old. The information was also organized based on the arrays of presence and absence of variations for each clone, for 21 morphological traits. Subsequently, genetic similarity measures were estimated using the Jaccard index and the UPGMA clustering method. The clones with the 12, 7, 9, and 11 morphological traits formed the morphological descriptors for the 30, 60, 90, and 120 days old cuttings, respectively. The traits of the leaf blade: length, width, length/width ratio, green intensity, and the brightness of the leaf, were common for all the evaluated ages, but their respective levels of expression were different.

Keywords: Cultivar protection; Distinguishability; Similarity

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Published

2021-07-26

How to Cite

Reategui-Betancourt, J. L., Arriel, D. A. A., Caldeira, S. F., Higa, A. R., Marques, R. M., Gonçalves, I. dos S., & Martinez, D. T. (2021). MORPHOLOGICAL DESCRIPTORS FOR THE CHARACTERISATION OF TEAK CLONES CUTTINGS (Tectona grandis L.F.). Revista Árvore, 45(1), https://doi.org/10.1590/1806–908820210000022. Retrieved from https://revistaarvore.ufv.br/rarv/article/view/243121

Issue

Revista Árvore, Viçosa-MG, v.45, 2021

Section

Silviculture

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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