Journal
CANADIAN JOURNAL OF FOREST RESEARCH
Volume 49, Issue 12, Pages 1504-1515Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjfr-2019-0145
Keywords
forest tree; breeding strategy; simulation; molecular marker; pedigree reconstruction
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Funding
- European Union [676876]
- French Agricultural Ministry
- AgreenSkills+ fellowship programme - EU's Seventh Framework Programme [FP7-609398]
- Fondation Bordeaux Universite
- Scion Strategic Science Investment
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Despite recent developments in molecular markers, most forest tree breeding programmes do not use them routinely. One way to integrate markers would be to use them for pedigree reconstruction after a simplified mating design through polymix or open-pollinated breeding. Thanks to the latest developments in the POPSIM simulator, various breeding strategies, including some based on paternity recovery, were evaluated with specified constraints on the level of diversity over breeding cycles. These simulations were carried out in two case studies: the French Pinus pinaster (Ait.) and the New Zealand Eucalyptus nitens (H. Dean & Maiden) Maiden breeding programmes. The Pinus pinaster case study produced lower genetic gain for the polymix breeding strategy with paternity recovery compared with double-pair mating or optimal-contribution strategies. However, the polymix breeding strategy could be of interest if the mating design is faster to complete. In the Eucalyptus nitens case study, pedigree recovery was shown to be a mandatory step to controlling the erosion of diversity over breeding cycles. In both cases, the strategies based on pedigree reconstruction were applicable with a limited level of genotyping. Finally, these simulations allow some general recommendations to be drawn to help breeders when designing a strategy for forest tree breeding.
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