Genetic variation of the pilodyn-girth relationship in Norway spruce (Picea abies L [Karst])

Abstract

Summary -Genetic variability in the relationship between pilodyn pin penetration (an indirect measure of wood density) and stem girth of individual trees was assessed at three levels (provenance, family [half-sib]

Genetic parameters for wood quality traits and resistance to the pathogens Heterobasidion parviporum and Endoconidiophora polonica in a Norway spruce breeding population

“…This implies that breeding efforts for faster growth or higher wood quality are unlikely to affect phloem resistance. The negative genetic correlations between diameter growth and wood density confirm many earlier studies (Costa e Silva et al 2000a;Grans et al 2009;Hannrup et al 2004;Hylen 1997;Karlsson and Högberg 1998;Rozenberg and VandeSype 1996;Steffenrem et al 2009), emphasizing the importance of a balanced selection for growth and wood density (e.g., Lee 1999) in order to avoid reduced wood quality from intensive breeding.…”

“…The narrow-sense heritability estimates are within the range from 0.40 to 0.60 for density and from 0.30 to 0.50 for spiral grain. Density is generally negatively correlated with growth traits, while spiral grain is not (Costa e Silva et al 2000a, b;Grans et al 2009;Hallingbäck et al 2008;Hannrup et al 2004;Hylen 1997;Karlsson and Högberg 1998;Rozenberg and VandeSype 1996;Steffenrem et al 2009). …”

A new experimental device for rapid measurement of the trunk equivalent modulus of elasticity on standing trees

“…Depth of needle penetration is read directly from the instrument, and is assumed to be well correlated with wood density [8,13]. Because wood density can be indirectly measured at low cost with Pilodyn, it is often used in tree breeding studies [1,6,34,36,37,40,41]. Other data are obtained with the Resistograph, a device intended to measure the power required to drill a hole into a given trunk [7,32].…”

Genetic control of stiffness of standing Douglas fir; from the standing stem to the standardised wood sample, relationships between modulus of elasticity and wood density parameters. Part II

“…Gentner [12], reporting on Picea sitchensis, found r 2 = 0.45, and Choi [6], reporting on Pseudotsuga menziesii, found r 2 = 0.54, both with latewood density. Takata [5,26] and Picea mariana [31] …”