Growth performance and stability of hybrid poplar clones in simultaneous tests on six sites

Neil D Nelson, William E. Berguson, Bernard G McMahon, Meijun Cai, Daniel J. Buchman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Growth, stability, and genotype x environment (GxE) interaction were investigated for 69 clones after five years at six sites in Minnesota. Fifty-three clones were Populus deltoides x Populus nigra (DxN) crosses, nine were P. deltoides x P. maximowiczi, ten other crosses. Most clones were previously screened for growth and disease resistance in Minnesota. Five-year diameter (DBH) and basal area (BA) at 1.38 m averaged 93.5 mm and 72.11 cm2, respectively, over the six sites. DBH site means varied from 109.0 to 79.4 mm. The fastest-growing clone BA was 64% and 49% larger than the mean of the two commercial standards and the mean of the population, respectively. Site, clone, and clone x site effects were highly significant in the ANOVA. The variance component for clone was over twice that of clone x site (GxE), indicating a relatively small reduction in genetic gain due to GxE. Clonal rank did not change between sites. GxE interaction was dominated by relative performance differences of clones on the different sites. Twenty-six percent of clones were stable (little change in growth between sites), 74% unstable. Stability coefficients of the unstable clones varied over a 99% range, indicating the population had high and variable phenotypic plasticity. Only 15% of clones were both stable and fast growing. Seven putatively superior clones, all DxN, were selected for future testing under near-commercial conditions. The results, if representative of other inter-specific Populus populations, suggest it will be difficult, and probably impractical, to reduce GxE with standard quantitative genetics methods in hybrid poplar tree improvement programs without sacrificing productivity gains.

Original languageEnglish (US)
Pages (from-to)115-125
Number of pages11
JournalBiomass and Bioenergy
Volume118
DOIs
StatePublished - Nov 1 2018

Fingerprint

clone
growth performance
clones
testing
Analysis of variance (ANOVA)
genotype
Plasticity
Productivity
Populus nigra
Populus deltoides
Testing
basal area
test
disease resistance
site effect
quantitative genetics
phenotypic plasticity
Populus
genetic improvement
analysis of variance

Keywords

  • Bioenergy
  • Forest genetics
  • Genotype x environment
  • Hybrid poplar
  • Populus
  • Tree improvement

Cite this

Growth performance and stability of hybrid poplar clones in simultaneous tests on six sites. / Nelson, Neil D; Berguson, William E.; McMahon, Bernard G; Cai, Meijun; Buchman, Daniel J.

In: Biomass and Bioenergy, Vol. 118, 01.11.2018, p. 115-125.

Research output: Contribution to journalArticle

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