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Provedor de dados:  Inra
País:  France
Título:  Selection perspectives for genetic improvement of wood stiffness in hybrid larch (Larix x eurolepis Henry)
Autores:  Pâques, L. E.
Millier, F.
Rozenberg, P.
Data:  2010
Ano:  2010
Palavras-chave:  MELEZE HYBRIDE
HERITABILITE
GAIN GENETIQUE
CORRELATION GENETIQUE
MODULE D'ELASTICITE
DENSITE DU BOIS
RIGIDITE DU BOIS
PARAMETRE GENETIQUE
RIGIDIMETRE LARCH
HERITABILITY
GENETIC GAIN
GENETIC CORRELATION
MODULUS OF ELASTICITY
WOOD DENSITY
WOOD STIFFNESS
GENETIC PARAMETER
Resumo:  Genetic variability of modulus of elasticity (MOE) was investigated in three genetic trials, including two progeny (16 years old) and one clonal (19 years old) trials of hybrid larch (Larix x eurolepis Henry). MOE was directly assessed on standing trees using the Rigidimeter, a bending device, and related to other traits including height, BH diameter and wood density. Mean MOE ranged from 5,183 to 9,228 MPa among families in the progeny trials and from 4,591 to 11,486 MPa in the clonal trial. Among traits studied, MOE was one of the most variable traits. It was strongly and positively related to wood density at both the individual and genotype mean levels. Interestingly too, wood stiffness did not seem, or only weakly, unfavourably linked to stem diameter at the phenotypical level, but it was negatively or not correlated to diameter at the genetic level. As well, MOE showed a high GxE stability over the two progeny trial sites. Narrow-sense heritabilities for MOE were moderate (around 0.36). In all three trials, they were lower than those for wood density or total height, and of the same level as for diameter. Improvement of wood stiffness of hybrid larch using the Rigidimeter seems possible and promising genetic gains are expected. Impacts of selection for growth traits on MOE are also discussed.
Tipo:  Journal Article
Idioma:  Inglês
Identificador:  http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010880888d4&uri=/notices/prodinra1/2010/05/

http://www.prodinra.inra.fr/prodinra/pinra/data/2010/05/PROD2010880888d_20100510050642402.pdf
Formato:  application/pdf
Fonte:  Tree Genetics and Genomes. 2010, 6 (1) : 83-92
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