Whole genome comparisons reveal panmixia among fall armyworm (Spodoptera frugiperda) from diverse locations

• Autores: Schlum, Katrina A.; Lamour, Kurt; Placidi de Bortoli, Caroline; Banerjee, Rahul; Meagher, Robert; Pereira, Eliseu; Murúa, María Gabriela; Sword, Gregory A.; Tessnow, Ashley E.; Viteri Dillon, Diego; Linares Ramirez, Angela M.; Akutse, Komivi S.; Schmidt Jeffris, Rebecca; Huang, Fangneng; Reisig, Dominic; Emrich, Scott J.; Jurat Fuentes, Juan Luis
• Año de publicación: 2021
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: CORN/RICE HOST STRAINS; FST; FALL ARMYWORM; GENOME WIDE DIVERSITY; PANMIXIA; SPODOPTERA FRUIGPERDA
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Background: The fall armyworm (Spodoptera frugiperda (J.E. Smith)) is a highly polyphagous agricultural pest with long-distance migratory behavior threatening food security worldwide. This pest has a host range of > 80 plant species, but two host strains are recognized based on their association with corn (C-strain) or rice and smaller grasses (R-strain). The population genomics of the United States (USA) fall armyworm remains poorly characterized to date despite its agricultural threat. Results: In this study, the population structure and genetic diversity in 55 S. frugiperda samples from Argentina, Brazil, Kenya, Puerto Rico and USA were surveyed to further our understanding of whole genome nuclear diversity. Comparisons at the genomic level suggest a panmictic S. frugiperda population, with only a minor reduction in gene flow between the two overwintering populations in the continental USA, also corresponding to distinct host strains at the mitochondrial level. Two maternal lines were detected from analysis of mitochondrial genomes. We found members from the Eastern Hemisphere interspersed within both continental USA overwintering subpopulations, suggesting multiple individuals were likely introduced to Africa. Conclusions: Our research is the largest diverse collection of United States S. frugiperda whole genome sequences characterized to date, covering eight continental states and a USA territory (Puerto Rico). The genomic resources presented provide foundational information to understand gene flow at the whole genome level among S. frugiperda populations. Based on the genomic similarities found between host strains and laboratory vs. field samples, our findings validate the experimental use of laboratory strains and the host strain differentiation based on mitochondria and sex-linked genetic markers extends to minor genome wide differences with some exceptions showing mixture between host strains is likely occurring in field populations.
Fil: Schlum, Katrina A.. University of Tennessee; Estados Unidos
Fil: Lamour, Kurt. University of Tennessee; Estados Unidos
Fil: Placidi de Bortoli, Caroline. University of Tennessee; Estados Unidos
Fil: Banerjee, Rahul. University of Tennessee; Estados Unidos
Fil: Meagher, Robert. United States Department Of Agriculture. Center For Medical Agric And Vet Entomology; Estados Unidos
Fil: Pereira, Eliseu. Universidade Federal de Viçosa; Brasil
Fil: Murúa, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino. Provincia de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial "Obispo Colombres" (p). Instituto de Tecnología Agroindustrial del Noroeste Argentino; Argentina
Fil: Sword, Gregory A.. Texas A&M University; Estados Unidos
Fil: Tessnow, Ashley E.. Texas A&M University; Estados Unidos
Fil: Viteri Dillon, Diego. Universidad de Puerto Rico; Puerto Rico
Fil: Linares Ramirez, Angela M.. Universidad de Puerto Rico; Puerto Rico
Fil: Akutse, Komivi S.. International Centre Of Insect Physiology And Ecology; Kenia
Fil: Schmidt Jeffris, Rebecca. United States Department Of Agriculture. Center For Medical Agric And Vet Entomology; Estados Unidos
Fil: Huang, Fangneng. State University of Louisiana; Estados Unidos
Fil: Reisig, Dominic. North Carolina State University; Estados Unidos
Fil: Emrich, Scott J.. University of Tennessee; Estados Unidos
Fil: Jurat Fuentes, Juan Luis. University of Tennessee; Estados Unidos