Predicting age-age genetic correlations in tree-breeding programs: a case study of Pinus taeda L

D.P. Gwaze, F.E. Bridgwater, T.D. Byram, John Woolliams, C.G. Williams

Research output: Contribution to journalArticlepeer-review

Abstract

A meta-analysis of 520 parents and 51,439 individuals was used to develop two equations for predicting age-age genetic correlations in Pinus taeda L. Genetic and phenotypic family mean correlations and heritabilities were estimated for ages ranging from 2 to 25 years on 31 sites in the southern U.S. and Zimbabwe. Equations for predicting age-age correlations based on P. taeda populations from west and east of the Mississippi River proved statistically different. Both predictive equations proved conservative for validation datasets consisting of younger tests in the U.S. and Zimbabwe. Age-dependant log-linear predictive equations were favored over growth-dependent equations. All P. taeda predictive equations based on genetic correlations favored earlier selection when compared to a generalized conifer predictive equation based on phenotypic correlations. The age-age correlations structure showed stability independent of planting density and across a wide range of family sizes.
Original languageUndefined/Unknown
Pages (from-to)199-206
Number of pages8
JournalTAG Theoretical and Applied Genetics
Volume100
Issue number2
DOIs
Publication statusPublished - 2000

Keywords

  • age-age genetic correlations phenotypic correlations conifers tree breeding woody perennials early selection loblolly-pine height parameters trends growth

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