Wendy Marie Waalen
Head of Department/Head of Research
Abstract
Background Faba bean cultivation in northern Europe is challenged by high variability in yield performance due to strong genotype × environment interaction (GEI). Appropriate GEI modeling and interpretation is essential for both cultivar recommendation and breeding for Nordic conditions. Methods Grain yield data from fifteen spring faba bean cultivars evaluated in eleven Norwegian environments during four growing seasons (2022–2025) were analyzed using the Additive Main Effects and Multiplicative Interaction (AMMI) model. Climatic drivers of GEI were investigated using factorial regression, while genome-wide SNP markers were used to assess the relationship between molecular diversity and adaptive differentiation. Results Environment, genotype, and GEI significantly influenced grain yield. The AMMI model with three GEI principal components (AMMI3) represented the biologically meaningful GEI signal and explained 83.4% of the GEI variation. The predictive accuracy of this model closely approached that of BLUP and GBLUP. Factorial regression showed that maximum and mean September temperatures explained 38.5% of the GEI variation, indicating that late-season thermal conditions are the principal environmental drivers of cultivar adaptation. We identified three top-yielding genotypes (Ketu, Birgit, and Vire) that can be object of site-specific recommendation. Two sub-regions emerged as possibly distinct breeding targets, namely, a major one, and a smaller one featuring cooler late-cycle temperatures and specific adaptation of very early material. A significant Mantel correlation between genomic and adaptive dissimilarity (r = 0.40, P = 0.029) suggested that differences in environmental adaptation have a measurable genetic basis. Conclusions This study identified elite cultivars for recommendation and generated crucial information for future crop breeding and variety testing in Norway. Breeding for wide adaptation across climatically diversified environments is justified by the modest size of the smaller sub-region and its expected decreasing importance due to climate change. The relationship between genomic and adaptive dissimilarity, if confirmed for a larger genotype set, could be exploited for a preliminary screening of regional breeding material and novel plant introductions.
Abstract
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Authors
Ingrid Flatland Sigridur Dalmannsdottir Randi Berland Frøseth Bjørn Arild Hatteland Birgitte Henriksen Mats Höglind Annbjørg Kristoffersen Eldrid Lein Molteberg Till Seehusen Hilde Haug Simonhjell Anita Sønsteby Pia Heltoft Thomsen Ingunn M. Vågen Wendy Marie Waalen Ingunn Øvsthus Arne BardalenAbstract
Dette notatet gir en oppdatering av kunnskapsgrunnlaget og relevans for klimatilpasning for de mest sentrale planteproduksjonene, dvs. korn, grovfor, grønnsaker og potet, frukt og bær. Notatet tar utgangspunkt i teksten i ulike fagnotater fra 2016, og oppdaterer beskrivelsene med oppdatert kunnskap relevant for de ulike produksjonene. Økt gjennomsnittstemperatur, økt CO2-konsentrasjon i atmosfæren og en lengre vekstsesong er fordeler som vil kunne utnyttes. På den annen side vil økt nedbør og mer ekstremvær i fremtiden bli utfordringer som må håndteres. Notatet peker på både utfordringer, muligheter og kunnskapsbehov for å lykkes i klimatilpasningsarbeidet.