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Research article - Peer-reviewed, 2021

Variation in non-target traits in genetically modified hybrid aspens does not exceed natural variation

Robinson, Kathryn M.; Moller, Linus; Bhalerao, Rishikesh P.; Hertzberg, Magnus; Nilsson, Ove; Jansson, Stefan


Genetically modified hybrid aspens (Populus tremula L. x P. tremuloides Michx.), selected for increased growth under controlled conditions, have been grown in highly replicated field trials to evaluate how the target trait (growth) translated to natural conditions. Moreover, the variation was compared among genotypes of ecologically important non-target traits: number of shoots, bud set, pathogen infection, amount of insect herbivory, composition of the insect herbivore community and flower bud induction. This variation was compared with the variation in a population of randomly selected natural accessions of P. tremula grown in common garden trials, to estimate how the "unintended variation" present in transgenic trees, which in the future may be commercialized, compares with natural variation. The natural variation in the traits was found to be typically significantly greater. The data suggest that when authorities evaluate the potential risks associated with a field experiment or commercial introduction of transgenic trees, risk evaluation should focus on target traits and that unintentional variation in non-target traits is of less concern.


Non-target traits; Genetically modified; Natural variation; Hybrid aspen; European aspen; Field experiment

Published in

New Biotechnology
2021, volume: 64, pages: 27-36
Publisher: ELSEVIER

Authors' information

Robinson, Kathryn M.
Umea University
Möller, Linus
SweTree Technologies
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Hertzberg, Magnus
SweTree Technol AB
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Jansson, Stefan
Umea University

UKÄ Subject classification

Agricultural Science

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