The Effect of Temperature on Drosophila Hybrid Fitness
Mechanisms of reproductive isolation inhibit gene flow between species and can be broadly sorted into two categories: prezygotic and postzygotic. While comparative studies suggest that prezygotic barriers tend to evolve first, postzygotic barriers are crucial for maintaining species boundaries and i...
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| Format: | Article |
| Language: | English |
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Oxford University Press
2017-02-01
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| Series: | G3: Genes, Genomes, Genetics |
| Subjects: | |
| Online Access: | http://g3journal.org/lookup/doi/10.1534/g3.116.034926 |
| _version_ | 1818433811167313920 |
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| author | Charles J. J. Miller Daniel R. Matute |
| author_facet | Charles J. J. Miller Daniel R. Matute |
| author_sort | Charles J. J. Miller |
| collection | DOAJ |
| description | Mechanisms of reproductive isolation inhibit gene flow between species and can be broadly sorted into two categories: prezygotic and postzygotic. While comparative studies suggest that prezygotic barriers tend to evolve first, postzygotic barriers are crucial for maintaining species boundaries and impeding gene flow that might otherwise cause incipient species to merge. Most, but not all, postzygotic barriers result from genetic incompatibilities between two or more loci from different species, and occur due to divergent evolution in allopatry. Hybrid defects result from improper allelic interactions between these loci. While some postzygotic barriers are environmentally-independent, the magnitude of others has been shown to vary in penetrance depending on environmental factors. We crossed Drosophila melanogaster mutants to two other species, D. simulans and D. santomea, and collected fitness data of the hybrids at two different temperatures. Our goal was to examine the effect of temperature on recessive incompatibility alleles in their genomes. We found that temperature has a stronger effect on the penetrance of recessive incompatibility alleles in the D. simulans genome than on those in the D. santomea genome. These results suggest that the penetrance of hybrid incompatibilities can be strongly affected by environmental context, and that the magnitude of such gene-by-environment interactions can be contingent on the genotype of the hybrid. |
| first_indexed | 2024-12-14T16:27:01Z |
| format | Article |
| id | doaj.art-f3fa3e5d938b461294b5c104200f00ff |
| institution | Directory Open Access Journal |
| issn | 2160-1836 |
| language | English |
| last_indexed | 2024-12-14T16:27:01Z |
| publishDate | 2017-02-01 |
| publisher | Oxford University Press |
| record_format | Article |
| series | G3: Genes, Genomes, Genetics |
| spelling | doaj.art-f3fa3e5d938b461294b5c104200f00ff2022-12-21T22:54:41ZengOxford University PressG3: Genes, Genomes, Genetics2160-18362017-02-017237738510.1534/g3.116.0349266The Effect of Temperature on Drosophila Hybrid FitnessCharles J. J. MillerDaniel R. MatuteMechanisms of reproductive isolation inhibit gene flow between species and can be broadly sorted into two categories: prezygotic and postzygotic. While comparative studies suggest that prezygotic barriers tend to evolve first, postzygotic barriers are crucial for maintaining species boundaries and impeding gene flow that might otherwise cause incipient species to merge. Most, but not all, postzygotic barriers result from genetic incompatibilities between two or more loci from different species, and occur due to divergent evolution in allopatry. Hybrid defects result from improper allelic interactions between these loci. While some postzygotic barriers are environmentally-independent, the magnitude of others has been shown to vary in penetrance depending on environmental factors. We crossed Drosophila melanogaster mutants to two other species, D. simulans and D. santomea, and collected fitness data of the hybrids at two different temperatures. Our goal was to examine the effect of temperature on recessive incompatibility alleles in their genomes. We found that temperature has a stronger effect on the penetrance of recessive incompatibility alleles in the D. simulans genome than on those in the D. santomea genome. These results suggest that the penetrance of hybrid incompatibilities can be strongly affected by environmental context, and that the magnitude of such gene-by-environment interactions can be contingent on the genotype of the hybrid.http://g3journal.org/lookup/doi/10.1534/g3.116.034926postzygotic isolationhybridsDrosophilatemperature |
| spellingShingle | Charles J. J. Miller Daniel R. Matute The Effect of Temperature on Drosophila Hybrid Fitness G3: Genes, Genomes, Genetics postzygotic isolation hybrids Drosophila temperature |
| title | The Effect of Temperature on Drosophila Hybrid Fitness |
| title_full | The Effect of Temperature on Drosophila Hybrid Fitness |
| title_fullStr | The Effect of Temperature on Drosophila Hybrid Fitness |
| title_full_unstemmed | The Effect of Temperature on Drosophila Hybrid Fitness |
| title_short | The Effect of Temperature on Drosophila Hybrid Fitness |
| title_sort | effect of temperature on drosophila hybrid fitness |
| topic | postzygotic isolation hybrids Drosophila temperature |
| url | http://g3journal.org/lookup/doi/10.1534/g3.116.034926 |
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