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Genetic variation in resistance of Norway spruce seedlings to damage by the pine weevil Hylobius abietis

Zas, Rafael and Björklund, Niklas and Sampedro, Luis and Hellqvist, Claes and Karlsson, Bo and Jansson, Stefan and Nordlander, Göran (2017). Genetic variation in resistance of Norway spruce seedlings to damage by the pine weevil Hylobius abietis. Tree Genetics and Genomes. 13:111, 1-12
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Official URL: http://dx.doi.org/10.1007/s11295-017-1193-1

Abstract

Regeneration of northern conifer forests is commonly performed by reforestation with genetically improved materials obtained from long-term breeding programs focused on productivity and timber quality. Sanitary threats can, however, compromise the realization of the expected genetic gain. Including pest resistance traits in the breeding programs may contribute to a sustainable protection. Here we quantified the variation in different components of resistance of Norway spruce to its main pest, the pine weevil Hylobius abietis. We followed insect damage in two large progeny trials (52 open-pollinated families with 100-200 individuals per family and trial) naturally infested by the pine weevil. Pine weevils damaged between 17 and 48% of the planted seedlings depending on the trial and year, and mortality due to weevil damage was up to 11.4%. The results indicate significant genetic variation in resistance to the pine weevil, and importantly, the variation was highly consistent across trials irrespective of contrasting incidence levels. Individual heritability estimates for the different components of seedling resistance were consistently low, but family heritabilities were moderate (0.53 to 0.81). While forward selections and breeding for higher resistance seem not feasible, backwards selections of the best parent trees emerge as a putative alternative to reduce weevil damage. A positive genetic correlation between early growth potential and probability of being attacked by the weevil was also observed, but the relationship was weak and appeared only in one of the trials. Overall, results presented here open the door to a new attractive way for reducing damage caused by this harmful pest.

Authors/Creators:Zas, Rafael and Björklund, Niklas and Sampedro, Luis and Hellqvist, Claes and Karlsson, Bo and Jansson, Stefan and Nordlander, Göran
Title:Genetic variation in resistance of Norway spruce seedlings to damage by the pine weevil Hylobius abietis
Series/Journal:Tree Genetics and Genomes (1614-2950)
Year of publishing :2017
Volume:13
Number:111
Page range:1-12
Number of Pages:12
Publisher:Springer Verlag
ISSN:1614-2950
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F40 Plant ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:genetic variation, Picea abies, seedlings, Hylobius abietis
Keywords:Insect herbivory, Plant-herbivore interactions, Breeding for pest resistance, Growth-resistance trade-offs, Hylobius abietis, Picea abies
URN:NBN:urn:nbn:se:slu:epsilon-e-4558
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4558
Additional ID:
Type of IDID
Web of Science (WoS)000412743100003
ID Code:14803
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:13 Dec 2017 09:12
Metadata Last Modified:13 Dec 2017 09:12

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