Transcriptional differences between the two host strains of Spodoptera frugiperda (Lepidoptera: Noctuidae)

Orsucci Marion, Moné Yves, Audiot Philippe, Gimenez Sylvie, Nhim Sandra, Naït-Saïdi Rima, Frayssinet Marie, Dumont Guillaume, Boudon Jean-Paul, Vabre Marin, Rialle Stéphanie, Koual Rachid, Kergoat Gael J., Nagoshi Rodney N., Meagher Robert L., D'Alençon Emmanuelle, Nègre Nicolas. 2022. Transcriptional differences between the two host strains of Spodoptera frugiperda (Lepidoptera: Noctuidae). Peer Community Journal, 2:e1, 19 p.

Url - jeu de données - Entrepôt autre : https://doi.org/10.5281/zenodo.3906086

Résumé : Spodoptera frugiperda, the fall armyworm (FAW), is an important agricultural pest in the Americas and an emerging pest in sub-Saharan Africa, India, East-Asia and Australia, causing damage to major crops such as corn, sorghum and soybean. While FAW larvae are considered polyphagous, differences in diet preference have been described between two genetic variants: the corn strain (sf-C) and the rice strain (sf-R). These two strains are sometimes considered as distinct species, raising the hypothesis that host plant specialization might have driven their divergence. To test this hypothesis, we first performed controlled reciprocal transplant (RT) experiments to address the impact of plant diet on several traits linked to the fitness of the sf-C and sf-R strains. The phenotypical data suggest that sf-C is specialized to corn. We then used RNA-Se to identify constitutive transcriptional differences between strains, regardless of diet, in laboratory as well as in natural populations. We found that variations in mitochondrial transcription levels are among the most substantial and consistent differences between the two strains. Since mitochondrial genotypes also vary between the strains, we believe the mitochondria may have a significant role in driving strain divergence.

Mots-clés Agrovoc : Oryza sativa, variation génétique, régime alimentaire, plante hôte, Gossypium hirsutum, larve, agroécosystème, lutte anti-insecte, phénotype

Mots-clés géographiques Agrovoc : France, Australie, Brésil, Inde, La Réunion, Afrique

Agences de financement hors UE : Institut Universitaire de France, Agence Nationale de la Recherche

Projets sur financement : (FRA) Déterminisme moléculaire de l'adaptation écologique et de la spéciation chez deux variants du lépidoptère Spodoptera frugiperda

Auteurs et affiliations

• Orsucci Marion, INRAE (FRA)
• Moné Yves, INRAE (FRA)
• Audiot Philippe, INRAE (FRA)
• Gimenez Sylvie, Université de Montpellier (FRA)
• Nhim Sandra, Université de Montpellier (FRA)
• Naït-Saïdi Rima, Université de Montpellier (FRA)
• Frayssinet Marie, Université de Montpellier (FRA)
• Dumont Guillaume, Université de Montpellier (FRA)
• Boudon Jean-Paul, INRAE (FRA)
• Vabre Marin, INRAE (FRA)
• Rialle Stéphanie, CNRS (FRA)
• Koual Rachid, CIRAD-BIOS-UMR ASTRE (FRA)
• Kergoat Gael J., INRAE (FRA)
• Nagoshi Rodney N., USDA (USA)
• Meagher Robert L., USDA (USA)
• D'Alençon Emmanuelle, INRAE (FRA)
• Nègre Nicolas, Université de Montpellier (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/611033/)

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