From cultivar mixtures to allelic mixtures opposite effects of allelic richness between genotypes and genotype richness in wheat

From cultivar mixtures to allelic mixtures : opposite effects of allelic richness between genotypes and genotype richness in wheat

© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 233(2022), 6 vom: 20. März, Seite 2573-2584
1. Verfasser: Montazeaud, Germain (VerfasserIn)
Weitere Verfasser: Flutre, Timothée, Ballini, Elsa, Morel, Jean-Benoit, David, Jacques, Girodolle, Johanna, Rocher, Aline, Ducasse, Aurélie, Violle, Cyrille, Fort, Florian, Fréville, Hélène
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Septoria tritici blotch allelic richness crop diversity genome-wide analysis plant-plant interactions varietal mixtures
Beschreibung
Zusammenfassung:© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.
Agroecosystem diversification through increased crop genetic diversity could provide multiple services such as improved disease control or increased productivity. However, we still poorly understand how genetic diversity affects agronomic performance. We grew 179 inbred lines of durum wheat in pure stands and in 202 binary mixtures in field conditions. We then tested the effect of allelic richness between genotypes and genotype richness on grain yield and Septoria tritici blotch disease. Allelic richness was tested at 19K single nucleotide polymorphisms distributed along the durum wheat genome. Both genotype richness and allelic richness could be equal to 1 or 2. Mixtures were overall more productive and less diseased than their pure stand components. Yet, we identified one locus at which allelic richness between genotypes was associated with increased disease severity and decreased grain yield. The effect of allelic richness at this locus was stronger than the effect of genotype richness on grain yield (-7.6% vs +5.7%). Our results suggest that positive effects of crop diversity can be reversed by unfavourable allelic associations. This highlights the need to integrate genomic data into crop diversification strategies. More generally, investigating plant-plant interactions at the genomic level is promising to better understand biodiversity-ecosystem functioning relationships
Beschreibung:Date Completed 31.03.2022
Date Revised 31.07.2022
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.17915