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Independent lines of evidence of a genetic relationship between acoustic wave velocity and kraft pulp yield in Eucalyptus globulus

journal contribution
posted on 2023-05-19, 02:10 authored by Hamilton, MG, Jules FreemanJules Freeman, Blackburn, DP, Downes, GM, Pilbeam, DJ, Bradley PottsBradley Potts

Key message: Multiple lines of evidence suggest acoustic wave velocity (AWV) would provide a rapid and efficient method to indirectly select for superior pulp yield in Eucalyptus globulus breeding programs.

Context: Eucalyptus globulus is one of the most widely planted hardwood species in temperate regions of the world and is primarily grown for pulpwood.

Aims: To determine if acoustic wave velocity (AWV) can be used to indirectly select for kraft pulp yield in E. globulus.

Methods: Genetic group effects, additive and non-additive variance components, and genetic correlations were estimated for AWV and pulpwood traits, including Kraft pulp yield. In a separate trial, the relative position of quantitative trait loci (QTL) for these traits was compared.

Results: Estimated narrow-sense heritabilities for AWV and pulp yield were both 0.26, and these traits were strongly genetically correlated (0.84). Furthermore, co-located QTL for these traits were identified. Further evidence that AWV could be used to indirectly select for pulp yield was provided by the ranking of genetic groups - Otways and King Island had the highest AWV and pulp yield and Strzelecki and Tasmania the lowest. There was no evidence of dominance variation in wood property traits.

Conclusion: Together, these findings suggest that AWV could be used as a selection criterion for kraft pulp yield in E. globulus breeding programs.

History

Publication title

Annals of Forest Science

Volume

74

Article number

17

Number

17

Pagination

1-10

ISSN

1286-4560

Department/School

School of Natural Sciences

Publisher

E D P Sciences

Place of publication

7, Ave Du Hoggar, Parc D Activites Courtaboeuf, Bp 112, Les Ulis Cedexa, France, F-91944

Rights statement

Copyright 2017 INRA and Springer-Verlag France

Repository Status

  • Restricted

Socio-economic Objectives

Hardwood plantations

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