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Multi-trait selection to build resilience in conifer forests: a case study on spruce-shoot weevil interactions

View ORCID ProfileJaroslav Klápště, Barry Jaquish, View ORCID ProfileIlga Porth
doi: https://doi.org/10.1101/2022.01.21.477209
Jaroslav Klápště
1Scion (New Zealand Forest Research Institute Ltd.), Rotorua, New Zealand
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  • ORCID record for Jaroslav Klápště
  • For correspondence: Jaroslav.Klapste@scionresearch.com Ilga.Porth@sbf.ulaval.ca
Barry Jaquish
2BC Ministry of Forests, Lands, Natural Resource Operations and Rural Development, Vernon, B.C., Canada
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Ilga Porth
3Department of Wood and Forest Sciences, Université Laval, Québec City, Québec, Canada
4Institute for System and Integrated Biology (IBIS), Université Laval, Québec City, Québec, Canada
5Centre for Forest Research, Université Laval, Québec City, Québec, Canada
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  • ORCID record for Ilga Porth
  • For correspondence: Jaroslav.Klapste@scionresearch.com Ilga.Porth@sbf.ulaval.ca
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Abstract

Tree planting programs now need to consider climate change increasingly, therefore, the resistance to pests plays an essential role in enabling tree adaptation to new ranges through tree population movement. The weevil Pissodes strobi (Peck) is a major pest of spruces and substantially reduces lumber quality. We revisited a large Interior spruce provenance/progeny trial (2,964 genotypes, 42 families) of varying susceptibility, established in British Columbia. We employed multivariate mixed linear models to estimate covariances between, and genetic control of, juvenile height growth and resistance traits. We performed linear regressions and ordinal logistic regressions to test for impact of parental origin on growth and susceptibility to the pest, respectively. A significant environmental component affected the correlations between resistance and height, with outcomes dependent on families. Parents sourced from above 950 m a.s.l. elevation negatively influenced host resistance to attacks, probably due to higher P. engelmannii proportion. For the genetic contribution of parents sourced from above 1,200 m a.s.l., however, we found less attack severity, probably due to a marked mismatch in phenologies. This clearly highlights that hybrid status might be a good predictor for weevil attacks and delineates the boundaries of successful spruce population movement. Families resulting from crossing susceptible with resistant parents generally showed fast-growing trees were the least affected by weevil attacks. Such results indicate that these “hybrids” might be genetically better equipped with an optimized resource allocation between defence and growth and might provide the solution for concurrent improvement in resistance against weevil attacks, whilst maintaining tree productivity.

Competing Interest Statement

The authors have declared no competing interest.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted January 21, 2022.
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Multi-trait selection to build resilience in conifer forests: a case study on spruce-shoot weevil interactions
Jaroslav Klápště, Barry Jaquish, Ilga Porth
bioRxiv 2022.01.21.477209; doi: https://doi.org/10.1101/2022.01.21.477209
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Multi-trait selection to build resilience in conifer forests: a case study on spruce-shoot weevil interactions
Jaroslav Klápště, Barry Jaquish, Ilga Porth
bioRxiv 2022.01.21.477209; doi: https://doi.org/10.1101/2022.01.21.477209

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