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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/1552

Title: Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile
Authors: Zamudio, F.
Rozenbergb, P.
Baettig, R.
Vergara, A.
Yanez, M.
Gantz, C.
Keywords: wood density
heritability
radiata pine
earlywood
latewood
Issue Date: Mar-2005
Publisher: EDP Ssciences
Citation: Annals of Forest Science 62 (2): 105-114
Abstract: This article describes changes in the genetic variation of wood density components with cambial age and their relationship with the within-ring area components. Wood samples from 31 half-sib families of radiata pine were submitted to X-ray densitometry procedures. Traits studied were earlywood (ED) and latewood (LD) density, earlywood ( EA) and latewood ( LA) area, and latewood proportion ( LP). Between rings 2 to 5 ( juvenile wood) and 11 to 14 ( mature wood), heritability estimates suggest that breeding for increased ED is feasible. Upward selection for ED would also be associated with a phenotypic reduction in EA in juvenile and mature wood. Between rings 6 to 10, the heritability estimates for ED indicate low genetic variation in the transition region. Attempts to increase ED by breeding might not have a significant impact on LD, though this trait showed a moderate genetic control in this region. Any change in ED and LD would have unclear effects on EA and LA, respectively, because of the changing pattern of genetic covariances.
Description: Zamudio, F. (reprint author); Baettig, R.; Vergara, A. and Yañez, M. Facultad de Ciencias Forestales, Universidad de Talca, PO Box 747, 2 Norte 685, Talca, Chile.
URI: http://dspace.utalca.cl/handle/1950/1552
ISSN: 1286-4560
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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