USAP-DC

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Evolution of hemoglobin genes in notothenioid fishes Start Date: 2016-09-01 End Date: 2024-01-01 Description/Abstract Antarctic notothenioid fishes, also known as cryonotothenioids, inhabit the icy and highly oxygenated waters surrounding the Antarctic continent after diverging from notothenioids inhabiting more temperate waters. Notothenioid hemoglobin and blood parameters are known to have evolved along with the establishment of stable polar conditions, and among Antarctic notothenioids, icefishes are evolutionary oddities living without hemoglobin following the deletion of all functional hemoglobin genes from their genomes. In this project, we investigate the evolution of hemoglobin genes and gene clusters across the notothenioid radiation until their loss in the icefish ancestor after its divergence from the dragonfish lineage to understand the forces, mechanisms, and potential causes for hemoglobin gene loss in the icefish ancestor. Personnel Person Role Desvignes, Thomas Investigator and contact Postlethwait, John Co-Investigator Funding Antarctic Organisms and Ecosystems Award # 2232891 Antarctic Organisms and Ecosystems Award # 1947040 Antarctic Organisms and Ecosystems Award # 1543383 AMD - DIF Record(s) USAP-1543383_1 USAP-1947040_1 Data Management Plan None in the Database Product Level: 4 (model output and interpretations) Datasets Repository Title (link) Format(s) Status USAP-DC Notothenioid species tree used in the study. Not Provided exists USAP-DC Phylogenetic trees of hemoglobin proteins in notothenioids. exists USAP-DC aBSREL tests for episodic diversifying selection on hemoglobin genes in notothenioids. exists USAP-DC Rates of hemoglobin evolution among genes and across notothenioid species. exists USAP-DC MEME tests of sites evolving under episodic diversifying selection in notothenioid hemoglobin genes. exists USAP-DC RELAX tests for pervasive changes in strength of natural selection on hemoglobin genes in notothenioids. exists USAP-DC Notothenioid hemoglobin protein 3D modeling. exists USAP-DC Metadata associated with the description of Akarotaxis gouldae n. sp. (Bathydraconidae) Portable Network Graphics exists Publications Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, John H Postlethwait, Cold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes, Molecular Biology and Evolution, 2023; msad236 (doi:https://doi.org/10.1093/molbev/msad236) Desvignes, T., Le François, N.R., Streeter, M. et al. Hybridization barriers between the congeneric antarctic notothenioid fish Notothenia coriiceps and Notothenia rossii. Polar Biol 47, 163–171 (2024). (doi:10.1007/s00300-023-03216-7) Keywords AQUATIC ECOSYSTEMS Blood Cryonotothenioid Dragonfish Eleginopsioidea FISH Gene Hemoglobin Icefish Notothenioid Plunderfish Sub-Antarctic