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Genetic correlations between wood quality traits of Pinus pinaster Ait.
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Orientador(es)
Resumo(s)
• It is essential to understand how characteristics are related to each other in breeding programmes
to select wood properties, in order to avoid that, in selecting for one trait, we are negatively affecting
another. Moreover, measuring wood properties is time consuming and expensive.
• This study assesses genetic and phenotypic correlations between wood density components and
spiral grain of 46 half-sib families of Pinus pinaster in seventeen-year-old trees.
• Results showed that genetic correlations for all wood density components were higher than corresponding
phenotypic correlations. Furthermore, all wood density components were highly genetically
correlated with ring density, and also closely associated among themselves. Results showed a higher
genetic correlation of ring density with earlywood density (rg = 0.96) than with latewood density
(rg = 0.79). A moderate to high positive genetic correlation was found between spiral grain and
wood density characteristics (0.29–0.61).
• We conclude that ring density (overall wood density) can be improved by increasing either earlywood
density, latewood percent, or both of these traits, and spiral grain can be modify in future
plantations
Descrição
Palavras-chave
wood density components spiral grain heritability genetic correlations Pinus pinaster tree breeding
Contexto Educativo
Citação
"Annals of Forest Science". ISSN 1297-966X. 65 (2008) 703