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Article Dans Une Revue Nature Communications Année : 2022

Physiological adaptive traits are a potential allele reservoir for maize genetic progress under challenging conditions

Romain Chapuis
Carine Palaffre
Stephane Melkior
  • Fonction : Auteur
Colin Guillaume
  • Fonction : Auteur
Alain Murigneux
  • Fonction : Auteur

Résumé

Combined phenomic and genomic approaches are required to evaluate the margin of progress of breeding strategies. Here, we analyze 65 years of genetic progress in maize yield, which was similar (101 kg ha −1 year −1 ) across most frequent environmental scenarios in the European growing area. Yield gains were linked to physiologically simple traits (plant phenology and architecture) which indirectly affected reproductive development and light interception in all studied environments, marked by significant genomic signatures of selection. Conversely, studied physiological processes involved in stress adaptation remained phenotypically unchanged (e.g. stomatal conductance and growth sensitivity to drought) and showed no signatures of selection. By selecting for yield, breeders indirectly selected traits with stable effects on yield, but not physiological traits whose effects on yield can be positive or negative depending on environmental conditions. Because yield stability under climate change is desirable, novel breeding strategies may be needed for exploiting alleles governing physiological adaptive traits.
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Dates et versions

hal-03709268 , version 1 (29-06-2022)

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Paternité - Pas d'utilisation commerciale

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Citer

Claude Welcker, Nadir Abusamra Spencer, Olivier Turc, Ítalo Stefanine Correia Granato, Romain Chapuis, et al.. Physiological adaptive traits are a potential allele reservoir for maize genetic progress under challenging conditions. Nature Communications, 2022, 13, pp.3225. ⟨10.1038/s41467-022-30872-w⟩. ⟨hal-03709268⟩
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