Syracuse

Co-GWAS unveils the genetic architecture of inter-individual epistasis affecting biomass and disease severity in wheat binary mixtures

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Mathieu, Laura | Montazeaud, Germain | Delmond, Mathilde | Brousse, Andy | Fréville, Hélène | Méteignier, Louis-Valentin | David, Jacques | Morel, Jean Benoît | Ballini, Elsa

Edité par CCSD -

The datasets and codes for data analysis and reproducing the plots are deposited in the Zenodo repository and available on doi.org/10.5281/zenodo.13883161.. Identifying the genetic determinants underlying plant-plant interactions is key for understanding plant community dynamics, both in natural and agronomical systems. This report unveils the complex genetic architecture of plant-plant interaction effects on aerial biomass and septoria tritici blotch severity in varietal mixtures of wheat, using co-genome-wide association study. Fifty-four signi cant allelic interactions between distinct loci were identi ed, with half involving hub loci. Some inter-individual epistasis might be related to the shade-avoidance syndrome. Our results underscore the critical role of allelic interactions between inter-individual loci in shaping plant phenotypes and community dynamics, offering new perspectives to optimize varietal mixtures.

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