ArticleMolecular biology and evolution2025
Comprehensive Annotation of Olfactory and Gustatory Receptor Genes and Transposable Elements Revealed Their Evolutionary Dynamics in Aphids.
Article in Molecular biology and evolution, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Genome-Wide Identification and Evolutionary Analysis of Chemosensory-Related Gene Families in the Solitary WaspInsects · 2026Article
- Article
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27 authors.
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Abstract
Gene duplication and transposable elements (TEs) are major drivers of genomic innovation that can fuel adaptation. While the roles of duplication and TE-driven diversification are documented in plant pathogens, they remain insufficiently explored in insect pests such as aphids, where olfactory (OR) and gustatory receptor (GR) genes are key to host recognition. We analyzed 521 OR and 399 GR genes, alongside TEs, across 12 aphid genomes with varying host ranges. Aphid lineages with broader host ranges exhibited higher evolutionary rates, driven by gene family expansions linked to host interaction, including lipid metabolism, immune function, and transposase activity. OR and GR genes evolved through proximal and tandem duplications and were shaped by diversifying selection, with bursts of positive selection followed by prolonged purifying selection, consistent with adaptation to novel hosts. Younger TEs were significantly enriched near OR genes compared to GRs and other genomic regions, suggesting a catalytic role of TEs in their diversification. However, OR proteins encoded by TE-associated ORs exhibited reduced functional potential. In contrast, GR proteins encoded by TE-associated GRs retained signatures of adaptation, as inferred from deep learning models predicting functionally important protein regions. These findings suggest that TE activity may facilitate functional innovation in GRs while alleviating constraints or pseudogenization in ORs. This study reveals how duplication, selection, and TE dynamics shape gene evolution in insect pests. It also provides the first chromosome-scale genome assembly of Dysaphis plantaginea, with comprehensive annotations and functional predictions of OR/GR genes, bridging adaptive evolution with mechanistic insights.
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