Abstract
Teak (Tectona grandis) is a high-value timber species in tropical regions. In Brazil, although teak has a high productivity, there are few studies related to its genetic improvement. This work aimed to estimate genetic parameters and evaluate potential gains of selection in a clonal test of teak installed in the state of Mato Grosso, Brazil. The experimente is in a randomized block design, with five replications, 3x3 m spacing, 22 treatments, and plots with six individuals. At five years, the genotypes were evaluated for survival (S), tree total height (H) and girth at breast height (GBH). There was significance and feasibility of selection for S and GBH. For H, the result was not significant, indicating few gains with the selection. The genetic parameters of clonal mean heritabilities and accuracy were of moderate magnitude for S and GBH and low for H. To best of our knowledge, this is the first work that estimates genetic parameters in a clonal teak test in the field in Brazil.
Highlights
Tectona grandis, popularly known as teak, is a timber specie that occurs naturally in India, Myanmar, Thailand, and Laos
Teak is cultivated in several regions of Africa and South and Central America (Nocetti et al 2011), with an estimated planting area ranging from 4.25 to 6.89 million hectares (Kollert and Kleine 2017)
In Brazil, teak was commercially introduced in the state of Mato Grosso in the 1970's, in the region of the city of Cáceres
Summary
Popularly known as teak, is a timber specie that occurs naturally in India, Myanmar, Thailand, and Laos. Teak is cultivated in several regions of Africa and South and Central America (Nocetti et al 2011), with an estimated planting area ranging from 4.25 to 6.89 million hectares (Kollert and Kleine 2017). There was a growing interest in its cultivation due to the high market value of its wood. Teak is the fifth most planted forest species in the country, with around 93,957 ha (IBA 2019). Its timber is considered an alternative to others of high economic value, such as that of Swietenia macrophylla King, the Brazilian mahogany, and that of Torresea acreana Ducke, the cherry tree (Pelissari et al 2013)
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