ArticleBMC ecology and evolution2022
Host-plant adaptation as a driver of incipient speciation in the fall armyworm (Spodoptera frugiperda).
Article in BMC ecology and evolution, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed.
- Retrotransposed gene copies persist under relaxed selection in wild Spodoptera frugiperda.Molecular biology and evolution · 2026Article
- Transcriptomic divergences of larval labial salivary glands facilitate host-plant range oscillations between specialist and generalist Helicoverpa species.BMC genomics · 2026Article
- Investigating the Genetic Underpinnings of Ongoing Fall Armyworm (FAW) Range Expansion in Aotearoa New Zealand.Ecology and evolution · 2026Article
- From the Americas to Southeast Asia: Navigating The Genomic Waves of Fall Armyworm (Evolutionary applications · 2025Article
- Population genomics analyses reveal the role of hybridization in the rapid invasion of fall armyworm.Journal of advanced research · 2025Article
- Lepidopteran Genomes Have Denser Transposable Elements in Smaller Chromosomes, Likely Driven by Non-allelic Homologous Recombination.Genome biology and evolution · 2025Article
- The evaluation of shotgun sequencing and rpoB metabarcoding for taxonomic profiling of bacterial communities.BMC microbiology · 2025Article
- Sex-specific expression of circadian rhythms enables allochronic speciation.Evolution letters · 2025Article
- Article
- Is the extreme within-population genome size variation real in Spodoptera frugiperda?PloS one · 2025Article
- Two host-plant strains in the fall armyworm.Insect science · 2024Review
- Population genomics unravels a lag phase during the global fall armyworm invasion.Communications biology · 2024Article
- Exploratory comparative transcriptomic analysis reveals potential gene targets associated with Cry1A.105 and Cry2Ab2 resistance in fall armyworm (Spodoptera frugiperda).Functional & integrative genomics · 2024Article
- Invasive fall armyworms are corn strain.Scientific reports · 2024Article
- Comparative analysis ofPeerJ · 2024Article
- Assessing fall armyworm (Frontiers in plant science · 2024Article
- Bionomic responses of Spodoptera frugiperda (J. E. Smith) to lethal and sublethal concentrations of selected insecticides.PloS one · 2023Article
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9 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundDivergent selection on host-plants is one of the main evolutionary forces driving ecological speciation in phytophagous insects. The ecological speciation might be challenging in the presence of gene flow and assortative mating because the direction of divergence is not necessarily the same between ecological selection (through host-plant adaptation) and assortative mating. The fall armyworm (FAW), a major lepidopteran pest species, is composed of two sympatric strains, corn and rice strains, named after two of their preferred host-plants. These two strains have been hypothesized to undergo incipient speciation, based on (i) several lines of evidence encompassing both pre- and post-zygotic reproductive isolation, and (ii) the presence of a substantial level of genetic differentiation. Even though the status of these two strains has been established a long time ago, it is still yet to be found whether these two strains indeed exhibit a marked level of genetic differentiation from a large number of genomic loci. Here, we analyzed whole genome sequences from 56 FAW individuals either collected from pasture grasses (a part of the favored host range of the rice strain) or corn to assess the role of host-plant adaptation in incipient speciation.
resultsPrincipal component analysis of whole genome data shows that the pattern of divergence in the fall armyworm is predominantly explained by the genetic differentiation associated with host-plants. The level of genetic differentiation between corn and rice strains is particularly marked in the Z chromosome. We identified one autosomal locus and two Z chromosome loci targeted by selective sweeps specific to rice strain and corn strain, respectively. The autosomal locus has both increased D
conclusionThese results show that the FAW population structure is dominated by the genetic differentiation between corn and rice strains. This differentiation involves divergent selection targeting at least three loci, which include a locus potentially causing reproductive isolation. Taken together, these results suggest the evolutionary scenario that host-plant speciation is a driver of incipient speciation in the fall armyworm.
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