ArticleScientific reports2016
Penguins reduced olfactory receptor genes common to other waterbirds.
Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 25 citations in OpenAlex.
- Diversity and evolution of the vertebrate chemoreceptor gene repertoire.Nature communications · 2024Article
- Molecular mechanisms of adaptive evolution in wild animals and plants.Science China. Life sciences · 2023Review
- A high-quality assembly reveals genomic characteristics, phylogenetic status, and causal genes for leucism plumage of Indian peafowl.GigaScience · 2022Article
- Olfactory receptor subgenome and expression in a highly olfactory procellariiform seabird.Genetics · 2022Article
- The skull of the Miocene Spheniscus urbinai (Aves, Sphenisciformes): osteology, brain morphology, and the cranial pneumatic systems.Journal of anatomy · 2021Article
- Signature of adaptive evolution in olfactory receptor genes in Cory's Shearwater supports molecular basis for smell in procellariiform seabirds.Scientific reports · 2020Article
- Trehalase Gene as a Molecular Signature of Dietary Diversification in Mammals.Molecular biology and evolution · 2019Article
- Convergent reduction of V1R genes in subterranean rodents.BMC evolutionary biology · 2019Article
- Genome-Wide Identification and Characterization of Olfactory Receptor Genes in Chinese Perch,Genes · 2019Article
- Exploration during early life: distribution, habitat and orientation preferences in juvenile king penguins.Movement ecology · 2019Article
- The Birth and Death of Olfactory Receptor Gene Families in Mammalian Niche Adaptation.Molecular biology and evolution · 2018Article
- Transcriptome sequencing and phylogenetic analysis of four species of luminescent beetles.Scientific reports · 2017Article
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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 sense of smell, or olfaction, is fundamental in the life of animals. However, penguins (Aves: Sphenisciformes) possess relatively small olfactory bulbs compared with most other waterbirds such as Procellariiformes and Gaviiformes. To test whether penguins have a reduced reliance on olfaction, we analyzed the draft genome sequences of the two penguins, which diverged at the origin of the order Sphenisciformes; we also examined six closely related species with available genomes, and identified 29 one-to-one orthologous olfactory receptor genes (i.e. ORs) that are putatively functionally conserved and important across the eight birds. To survey the 29 one-to-one orthologous ORs in penguins and their relatives, we newly generated 34 sequences that are missing from the draft genomes. Through the analysis of totaling 378 OR sequences, we found that, of these functionally important ORs common to other waterbirds, penguins have a significantly greater percentage of OR pseudogenes than other waterbirds, suggesting a reduction of olfactory capability. The penguin-specific reduction of olfactory capability arose in the common ancestor of penguins between 23 and 60 Ma, which may have resulted from the aquatic specializations for underwater vision. Our study provides genetic evidence for a possible reduction of reliance on olfaction in penguins.
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