Developing breeding objectives for radiata pine structural wood production. II. Sensitivity analyses
- 1 November 2006
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Forest Research
- Vol. 36 (11), 2932-2942
- https://doi.org/10.1139/x06-162
Abstract
In a companion paper we describe a bioeconomic model of a production system for radiata pine (Pinus radiata D. Don) structural timber and estimated economic weights for four breeding-objective traits: mean annual increment, stem sweep, average branch size, and modulus of elasticity. In this paper we show estimation errors and the sensitivity of the economic weights to the input parameters of the production-system model. We also illustrate the linearity and independence of the economic weights and the sensitivity of selection indices to variation in economic weights and genetic parameters. Estimated standard errors of economic weights were generally low. Among the production-system parameters studied, discount rate and roundwood and sawn-timber prices had the largest impact on the estimates of economic weights. The relationship between the change in values of breeding-objective traits and the corresponding change in profit was nonlinear. The profit change due to change in one objective trait was not independent of the values of the other traits. The most important factors affecting the sensitivity of the selection index were the phenotypic variances of early selection traits such as tree diameter and wood basic density and the economic weights of mean annual increment and modulus of elasticity.Keywords
This publication has 8 references indexed in Scilit:
- Optimization of multiple trait selection in western hemlock (Tsuga heterophylla (Raf.) Sarg.) including pulp and paper propertiesAnnals of Forest Science, 2002
- Dynamic Control of Timber Production at a Sawmill with Log Sawing OptimizationScandinavian Journal of Forest Research, 2002
- Consensus and Debate in the Definition of Breeding ObjectivesJournal of Dairy Science, 1998
- Economic values for beef production traits from a herd level bioeconomic modelCanadian Journal of Animal Science, 1998
- The influence of wood quality on lumber drying distortionAnnals of Forest Science, 1996
- Estimation of economic weights in genetic improvement using neoclassical production theory: an alternative to rescalingAnimal Science, 1992
- Implications of non-linear economic weights for breedingTheoretical and Applied Genetics, 1990
- Linear selection indices for non-linear profit functionsTheoretical and Applied Genetics, 1988