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Genetic correlations between wood quality traits of Pinus pinaster Ait

Corrélations génétiques entre propriétés du bois chez Pinus pinaster Ait

Annals of Forest Science volume 65, page 703 (2008)Cite this article

Abstract

  • • 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 (r g = 0.96) than with latewood density r g = 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.

Résumé

  • • En amélioration génétique, il est essentiel de connaître le degré de liaison entre caractères de manière à éviter lors de la sélection pour un caractère une contre-sélection pour un autre. De plus, la mesure des propriétés du bois est lourde et coûteuse.

  • • Dans cette étude, nous étudions les corrélations génétiques et phénotypiques entre les composantes de la densité du bois et l’angle du fil chez 46 familles de demi-frères de Pinus pinaster âgées de 17 ans.

  • • Les résultats montrent que les corrélations génétiques pour toutes les composantes de la densité du bois sont plus élevées que les corrélations phénotypiques. De plus, toutes les composantes de la densité sont fortement corrélées génétiquement avec la densité du cerne et étroitement liées entre elles. Les résultats indiquent une liaison génétique plus forte entre la densité du cerne et la densité du bois initial (r g = 0.96) qu’avec le bois final (r g = 0.79). Une corrélation génétique modérée à forte est mise en évidence entre l’angle du fil du bois et les caractéristiques de densité (0.29–0.61).

  • • Nous concluons que la densité du cerne peut être améliorée soit en augmentant la densité du bois initial, soit la proportion de bois final, soit les deux et que l’angle du fil peut être modifié pour les plantations futures.

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Authors and Affiliations

  1. Centro de Investigação e de Tecnologias Agro-Ambientais e Biológicas, Departamento Florestal, Universidade Trás-os-Montes e Alto Douro, Portugal

    Maria João Gaspar & José Luís Louzada

  2. INIA - Instituto Nacional de Recursos Biológicos, Quinta do Marquês, Portugal

    Alexandre Aguiar

  3. Instituto Superior de Agronomia, Centro de Estudos Florestais, Universidade Técnica de Lisboa, Portugal

    Maria Helena Almeida

Authors
  1. Maria João Gaspar
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  2. José Luís Louzada
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  3. Alexandre Aguiar
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  4. Maria Helena Almeida
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Correspondence to Maria João Gaspar.

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Gaspar, M.J., Louzada, J.L., Aguiar, A. et al. Genetic correlations between wood quality traits of Pinus pinaster Ait. Ann. For. Sci. 65, 703 (2008). https://0-doi-org.brum.beds.ac.uk/10.1051/forest:2008054

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  • DOI: https://0-doi-org.brum.beds.ac.uk/10.1051/forest:2008054

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Annals of Forest Science

ISSN: 1297-966X