The early embryonic transcriptome of a Hawaiian Drosophila picture‐wing fly shows evidence of altered gene expression and novel gene evolution
| Autor: | Anna Rusnak, Susan E. Lott, Ahmad Karkoutli, Madeline Chenevert, Joel Atallah, Bronwyn Miller |
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| Rok vydání: | 2022 |
| Předmět: |
Evolution
education de novo genes embryo maternal-to-zygotic-transition Genome Hawaii Evolution Molecular Hox genes transcriptomics Hawaiian Drosophila Drosophilidae Adaptive radiation Genetics Animals Drosophila grimshawi Clade Hox gene Drosophila Gene Phylogeny Ecology Evolution Behavior and Systematics Evolutionary Biology biology fungi Human Genome Molecular biology.organism_classification Evolutionary biology Molecular Medicine Animal Science and Zoology Transcriptome novel genes Zoology geographic locations Developmental Biology |
| Zdroj: | Journal of experimental zoology. Part B, Molecular and developmental evolution, vol 338, iss 5 |
| ISSN: | 1552-5015 1552-5007 |
| Popis: | A massive adaptive radiation on the Hawaiian archipelago has produced approximately one quarter of the fly species in the family Drosophilidae. The Hawaiian Drosophila clade has long been recognized as a model system for the study of both the ecology of island endemics and the evolution of developmental mechanisms, but relatively few genomic and transcriptomic datasets are available for this group. We present here a differential expression analysis of the transcriptional profiles of two highly conserved embryonic stages in the Hawaiian picture-wing fly Drosophila grimshawi. When we compared our results to previously published datasets across the family Drosophilidae, we identified cases of both gains and losses of gene representation in D. grimshawi, including an apparent delay in Hox gene activation. We also found high expression of unannotated genes. Most transcripts of unannotated genes with open reading frames do not have homologs in non-Hawaiian Drosophila species, although the vast majority have sequence matches in other genomes of the Hawaiian picture-wing flies. Some of these genes may have arisen from non-coding sequence in the ancestor of Hawaiian flies or during the evolution of the clade. Our results suggests that both the modified use of ancestral genes and the evolution of new ones may occur in rapid radiations.RESEARCH HIGHLIGHTSThe early embryonic transcriptome of the Hawaiian fly Drosophila grimshawi shows a loss of expression of conserved Stage 5 genes, including the Hox genesThe de novo evolution of embryonically expressed genes may be occurring in the Hawaiian Drosophila lineageAUTHORS’ STATEMENTThis paper is not being considered for publication elsewhere. This study formed part of Madeline Chenevert’s M.S. thesis. |
| Databáze: | OpenAIRE |
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