dc.contributor.author | Levin, Boris | |
dc.contributor.author | Simonov, Evgeniy | |
dc.contributor.author | Gabrielyan, Bardukh K. | |
dc.contributor.author | Mayden, Richard L. | |
dc.contributor.author | Rastorguev, Sergey M. | |
dc.contributor.author | Roubenyan, Haikaz R. | |
dc.contributor.author | Sharko, Fedor S. | |
dc.contributor.author | Nedoluzhko, Artem V. | |
dc.date.accessioned | 2022-08-29T11:40:19Z | |
dc.date.available | 2022-08-29T11:40:19Z | |
dc.date.created | 2021-11-10T05:59:20Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Levin, B., Simonov, E., Gabrielyan, B. K., Mayden, R. L., Rastorguev, Roubenyan, H. R., Sharko, F. S. & Nedoluzhko, A. V. (2022). Caucasian treasure: Genomics sheds light on the evolution of half-extinct Sevan trout, Salmo ischchan, species flock, Molecular Phylogenetics and Evolution, 167: 107346. doi: | en_US |
dc.identifier.issn | 1095-9513 | |
dc.identifier.uri | https://hdl.handle.net/11250/3014140 | |
dc.description.abstract | Five ecologically and phenotypically divergent ecomorphs of the genus Salmo are known from a landlocked alpine lake in the Caucasus, Lake Sevan. It is an example of sympatric diversification within a species-rich lineage with predominate mode of speciation being allopatric. The diversification of Sevan trouts was accompanied by spawning resource partitioning. Four lacustrine ecomorphs with different temporal-spatial spawning strategies and divergent morphology and coloration evolved along with a fifth ecomorph, brook trout, inhabiting the tributaries. Unfortunately, the Sevan trout diversity was almost destroyed by human activity, with two ecomorphs becoming extinct in the 1980s. We performed reconstruction of the evolutionary history of Sevan trouts based on high-throughput sequencing of both contemporary and historical DNA (∼ 50 y.o.) of all Sevan trout ecomorphs. Our study of complete mitogenomes along with genome-wide SNP data revealed the monophyly of four lacustrine ecomorphs and local brook trout, all derived from the anadromous form Caspian salmon, S. caspius. The species tree suggests a scenario of stepwise evolution from riverine to lacustrine spawning. Three genomic clusters were revealed, of which two refer to the riverine and lacustrine spawners within the flock of Sevan trouts (with FST value = 0.069). A few SNP outliers under selection were discovered that could be responsible for assortative mating based on visual recognition. The Holocene climatic oscillations and the desiccation of tributaries could have played an important role in the origin of lacustrine spawning. The relationships between lacustrine ecomorphs were not yet fully resolved. This radiation warrants further investigation. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.title | Caucasian treasure: genomics sheds light on the evolution of half-extinct Sevan trout, Salmo ischchan, species flock | en_US |
dc.title.alternative | Caucasian treasure: genomics sheds light on the evolution of half-extinct Sevan trout, Salmo ischchan, species flock | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2021 Elsevier Inc. | en_US |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Genetikk og genomikk: 474 | en_US |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoofysiologi og komparativ fysiologi: 483 | en_US |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486 | en_US |
dc.source.pagenumber | 11 | en_US |
dc.source.volume | 167 | en_US |
dc.source.journal | Molecular Phylogenetics and Evolution | en_US |
dc.identifier.doi | 10.1016/j.ympev.2021.107346 | |
dc.identifier.cristin | 1952991 | |
dc.source.articlenumber | 107346 | en_US |