Reducing herbivory in mixed planting by genomic prediction of neighbor effects in the field

Yasuhiro Sato (), Rie Shimizu-Inatsugi, Kazuya Takeda, Bernhard Schmid, Atsushi J. Nagano () and Kentaro K. Shimizu ()
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Yasuhiro Sato: University of Zurich, Winterthurerstrasse 190
Rie Shimizu-Inatsugi: University of Zurich, Winterthurerstrasse 190
Kazuya Takeda: Ryukoku University, Yokotani 1-5, Seta Oe-cho
Bernhard Schmid: University of Zurich, Winterthurerstrasse 190
Atsushi J. Nagano: Ryukoku University, Yokotani 1-5, Seta Oe-cho
Kentaro K. Shimizu: University of Zurich, Winterthurerstrasse 190

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract Genetically diverse populations can increase plant resistance to natural enemies. Yet, beneficial genotype pairs remain elusive due to the occurrence of positive or negative effects of mixed planting on plant resistance, respectively called associational resistance or susceptibility. Here, we identify key genotype pairs responsible for associational resistance to herbivory using the genome-wide polymorphism data of the plant species Arabidopsis thaliana. To quantify neighbor interactions among 199 genotypes grown in a randomized block design, we employ a genome-wide association method named “Neighbor GWAS” and genomic prediction inspired by the Ising model of magnetics. These analyses predict that 823 of the 19,701 candidate pairs can reduce herbivory in mixed planting. We planted three pairs with the predicted effects in mixtures and monocultures, and detected 18–30% reductions in herbivore damage in the mixed planting treatment. Our study shows the power of genomic prediction to assemble genotype mixtures with positive biodiversity effects.

Date: 2024
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DOI: 10.1038/s41467-024-52374-7

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