Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii
Chemosensory perception allows insects to interact with the environment by perceiving odorant or tastant molecules; genes encoding chemoreceptors are the molecular interface between the environment and the insect, and play a central role in mediating its chemosensory behavior. Here, we explore how t...
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| Format: | Article |
| Language: | English |
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Oxford University Press
2016-12-01
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| Series: | G3: Genes, Genomes, Genetics |
| Subjects: | |
| Online Access: | http://g3journal.org/lookup/doi/10.1534/g3.116.036467 |
| _version_ | 1819153560831524864 |
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| author | Cristina M. Crava Sukanya Ramasamy Lino Ometto Gianfranco Anfora Omar Rota-Stabelli |
| author_facet | Cristina M. Crava Sukanya Ramasamy Lino Ometto Gianfranco Anfora Omar Rota-Stabelli |
| author_sort | Cristina M. Crava |
| collection | DOAJ |
| description | Chemosensory perception allows insects to interact with the environment by perceiving odorant or tastant molecules; genes encoding chemoreceptors are the molecular interface between the environment and the insect, and play a central role in mediating its chemosensory behavior. Here, we explore how the evolution of these genes in the emerging pest Drosophila suzukii correlates with the peculiar ecology of this species. We annotated approximately 130 genes coding for gustatory receptors (GRs) and divergent ionotropic receptors (dIRs) in D. suzukii and in its close relative D. biarmipes. We then analyzed the evolution, in terms of size, of each gene family as well of the molecular evolution of the genes in a 14 Drosophila species phylogenetic framework. We show that the overall evolution of GRs parallels that of dIRs not only in D. suzukii, but also in all other analyzed Drosophila. Our results reveal an unprecedented burst of gene family size in the lineage leading to the suzukii subgroup, as well as genomic changes that characterize D. suzukii, particularly duplications and strong signs of positive selection in the putative bitter-taste receptor GR59d. Expression studies of duplicate genes in D. suzukii support a spatio-temporal subfunctionalization of the duplicate isoforms. Our results suggest that D. suzukii is not characterized by gene loss, as observed in other specialist Drosophila species, but rather by a dramatic acceleration of gene gains, compatible with a highly generalist feeding behavior. Overall, our analyses provide candidate taste receptors specific for D. suzukii that may correlate with its specific behavior, and which may be tested in functional studies to ultimately enhance its control in the field. |
| first_indexed | 2024-12-22T15:07:08Z |
| format | Article |
| id | doaj.art-6067b3017694426fbc5e4907da6830b2 |
| institution | Directory Open Access Journal |
| issn | 2160-1836 |
| language | English |
| last_indexed | 2024-12-22T15:07:08Z |
| publishDate | 2016-12-01 |
| publisher | Oxford University Press |
| record_format | Article |
| series | G3: Genes, Genomes, Genetics |
| spelling | doaj.art-6067b3017694426fbc5e4907da6830b22022-12-21T18:21:58ZengOxford University PressG3: Genes, Genomes, Genetics2160-18362016-12-016124185419610.1534/g3.116.03646737Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukiiCristina M. CravaSukanya RamasamyLino OmettoGianfranco AnforaOmar Rota-StabelliChemosensory perception allows insects to interact with the environment by perceiving odorant or tastant molecules; genes encoding chemoreceptors are the molecular interface between the environment and the insect, and play a central role in mediating its chemosensory behavior. Here, we explore how the evolution of these genes in the emerging pest Drosophila suzukii correlates with the peculiar ecology of this species. We annotated approximately 130 genes coding for gustatory receptors (GRs) and divergent ionotropic receptors (dIRs) in D. suzukii and in its close relative D. biarmipes. We then analyzed the evolution, in terms of size, of each gene family as well of the molecular evolution of the genes in a 14 Drosophila species phylogenetic framework. We show that the overall evolution of GRs parallels that of dIRs not only in D. suzukii, but also in all other analyzed Drosophila. Our results reveal an unprecedented burst of gene family size in the lineage leading to the suzukii subgroup, as well as genomic changes that characterize D. suzukii, particularly duplications and strong signs of positive selection in the putative bitter-taste receptor GR59d. Expression studies of duplicate genes in D. suzukii support a spatio-temporal subfunctionalization of the duplicate isoforms. Our results suggest that D. suzukii is not characterized by gene loss, as observed in other specialist Drosophila species, but rather by a dramatic acceleration of gene gains, compatible with a highly generalist feeding behavior. Overall, our analyses provide candidate taste receptors specific for D. suzukii that may correlate with its specific behavior, and which may be tested in functional studies to ultimately enhance its control in the field.http://g3journal.org/lookup/doi/10.1534/g3.116.036467gene familiesDrosophilidaegustationgene birth-and-deathgene duplicationSpotted wing drosophila |
| spellingShingle | Cristina M. Crava Sukanya Ramasamy Lino Ometto Gianfranco Anfora Omar Rota-Stabelli Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii G3: Genes, Genomes, Genetics gene families Drosophilidae gustation gene birth-and-death gene duplication Spotted wing drosophila |
| title | Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii |
| title_full | Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii |
| title_fullStr | Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii |
| title_full_unstemmed | Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii |
| title_short | Evolutionary Insights into Taste Perception of the Invasive Pest Drosophila suzukii |
| title_sort | evolutionary insights into taste perception of the invasive pest drosophila suzukii |
| topic | gene families Drosophilidae gustation gene birth-and-death gene duplication Spotted wing drosophila |
| url | http://g3journal.org/lookup/doi/10.1534/g3.116.036467 |
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