ArticleJournal of experimental zoology. Part B, Molecular and developmental evolution2018
Enormous expansion of the chemosensory gene repertoire in the omnivorous German cockroach Blattella germanica.
Article in Journal of experimental zoology. Part B, Molecular and developmental evolution, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.
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42 citing papers in PubMed, 95 citations in OpenAlex.
- Genome and transcriptome-based identification and expression profiling of chemosensory gene families across developmental stages and tissues in Sirex noctilio (Hymenoptera: Siricidae).Insect molecular biology · 2026Article
- Early hexapod genomes reveal the deep origin of insect gustatory and odorant receptors.Nature communications · 2026Article
- Odorant-binding proteins and chemosensory proteins in insects: structural insights, functional plasticity, and prospects for targeted pest management.Molecular biology reports · 2026Review
- Pheromone-Mediated Social Organization and Pest Management of the Red Imported Fire Ant,Insects · 2026Review
- Odorant Binding Proteins inInsects · 2025Review
- Comparative Expression Analysis of Olfactory Receptor Genes Among Individuals With Soldier and Worker Caste Differentiation Fates in Termites.Ecology and evolution · 2025Article
- Transcriptomic Analysis and Comparative Analysis of Gene Families Related to Environmental Adaptation in Two Grylloblattodea Species:Ecology and evolution · 2025Article
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- Identification of an additional periplanone receptor family gene preferentially expressed in the male antennae of the American cockroach.Scientific reports · 2025Article
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- Advances in genome sequencing reveal changes in gene content that contribute to arthropod macroevolution.Development genes and evolution · 2023Review
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- Transcriptome analysis and identification of genes related to environmental adaptation ofEcology and evolution · 2023Article
- Live-bearing cockroach genome reveals convergent evolutionary mechanisms linked to viviparity in insects and beyond.iScience · 2023Article
- De Novo Assembly and Characterization of the Transcriptome of an Omnivorous Camel Cricket (International journal of molecular sciences · 2023Article
- A draft Diabrotica virgifera virgifera genome: insights into control and host plant adaption by a major maize pest insect.BMC genomics · 2023Article
- The antennal transcriptome of Triatoma infestans reveals substantial expression changes triggered by a blood meal.BMC genomics · 2022Article
- Host-plant adaptation as a driver of incipient speciation in the fall armyworm (Spodoptera frugiperda).BMC ecology and evolution · 2022Article
- Article
- Silencing the odorant receptor co-receptor impairs olfactory reception in a sensillum-specific manner in the cockroach.iScience · 2022Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The acquisition of genome sequences from a wide range of insects and other arthropods has revealed a broad positive correlation between the complexity of their chemical ecology and the size of their chemosensory gene repertoire. The German cockroach Blattella germanica is an extreme omnivore and has the largest chemosensory gene repertoire known for an arthropod, exceeding even the highly polyphagous spider mite Tetranychus urticae. While the Odorant Receptor family is not particularly large, with 123 genes potentially encoding 134 receptors (105 intact), the Gustatory Receptor family is greatly expanded to 431 genes potentially encoding 545 receptors (483 intact), the largest known for insects and second only to the spider mite. The Ionotropic Receptor family of olfactory and gustatory receptors is vastly expanded to at least 897 genes (604 intact), the largest size known in arthropods, far surpassing the 150 known from the dampwood termite Zootermopsis nevadensis. Commensurately, the Odorant Binding Protein family is expanded to the largest known for insects at 109 genes (all intact). Comparison with the far more specialized, but phylogenetically related termite, within the Dictyoptera, reveals considerable gene losses from the termite, and massive species-specific gene expansions in the cockroach. The cockroach has lost function of 11%-41% of these three chemoreceptor gene families to pseudogenization, and most of these are young events, implying rapid turnover of genes along with these major expansions, presumably in response to changes in its chemical ecology.
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