Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska
Alaska caribou (Rangifer tarandus granti) in southwestern Alaska are a poorly understood system, with differing descriptions of their regional population structure, population abundance that has varied greatly through time and instances of the release of domestic reindeer (R. t. tarandus) into their...
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ftdryad:oai:v1.datadryad.org:10255/dryad.62162 2023-05-15T18:04:24+02:00 Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska Colson, Kevin E. Mager, Karen H. Hundertmark, Kris J. Alaska Alaska peninsula Unimak Island 2014-04-02T19:33:01Z http://hdl.handle.net/10255/dryad.62162 https://doi.org/10.5061/dryad.9qh56 unknown doi:10.5061/dryad.9qh56/1 doi:10.1093/jhered/esu030 PMID:24842565 doi:10.5061/dryad.9qh56 Colson KE, Mager KH, Hundertmark KJ (2014) Reindeer introgression and the population genetics of caribou in Southwestern Alaska. Journal of Heredity 105(5): 585-596. http://hdl.handle.net/10255/dryad.62162 Domestic introgression Bayesian assignment Genetic bottlenecks Population genetics Conservation genetics and biodiversity Population structure and phylogeography Article 2014 ftdryad https://doi.org/10.5061/dryad.9qh56 https://doi.org/10.5061/dryad.9qh56/1 https://doi.org/10.1093/jhered/esu030 2020-01-01T15:07:31Z Alaska caribou (Rangifer tarandus granti) in southwestern Alaska are a poorly understood system, with differing descriptions of their regional population structure, population abundance that has varied greatly through time and instances of the release of domestic reindeer (R. t. tarandus) into their range. Here, we use 21 microsatellites and 297 individuals to investigate the genetic population structure of herds and examine for population bottlenecks. Then, using genetic characteristics of existing reindeer populations, we examine introgression into the wild caribou populations. Caribou of the area are genetically diverse (HE between 0.69 – 0.84), with diversity decreasing along the Alaska Peninsula (AP). Using GST and Jost’s D, we find extensive structuring among all herds; MIGRATE-N finds AP herds share few effective migrants with other herds, with South AP and Unimak Island herds having the least. Bayesian clustering techniques are able to resolve all but Denali and Mulchatna caribou herds. Using a conservative assignment threshold of qreindeer ≥ 0.2, 3% of caribou show signs of domestic introgression. Denali herd has the most introgressed individuals (6.9%); those caribou herds that were historically adjacent to smaller reindeer herds, or were historically without adjacent herding, show no admixture. This domestic introgression persists despite the lack of managed reindeer in the region since the 1940s. Our results suggest that despite previous movement data indicating metapopulation like dispersal in this region, there may be unknown barriers to reproduction by dispersing individuals. Finally, our results support findings that wild and domestic Rangifer can hybridize, and show this introgression may persist dozens of generations after domestics are no longer present. Article in Journal/Newspaper Rangifer tarandus Alaska Dryad Digital Repository (Duke University) |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Domestic introgression Bayesian assignment Genetic bottlenecks Population genetics Conservation genetics and biodiversity Population structure and phylogeography |
spellingShingle |
Domestic introgression Bayesian assignment Genetic bottlenecks Population genetics Conservation genetics and biodiversity Population structure and phylogeography Colson, Kevin E. Mager, Karen H. Hundertmark, Kris J. Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
topic_facet |
Domestic introgression Bayesian assignment Genetic bottlenecks Population genetics Conservation genetics and biodiversity Population structure and phylogeography |
description |
Alaska caribou (Rangifer tarandus granti) in southwestern Alaska are a poorly understood system, with differing descriptions of their regional population structure, population abundance that has varied greatly through time and instances of the release of domestic reindeer (R. t. tarandus) into their range. Here, we use 21 microsatellites and 297 individuals to investigate the genetic population structure of herds and examine for population bottlenecks. Then, using genetic characteristics of existing reindeer populations, we examine introgression into the wild caribou populations. Caribou of the area are genetically diverse (HE between 0.69 – 0.84), with diversity decreasing along the Alaska Peninsula (AP). Using GST and Jost’s D, we find extensive structuring among all herds; MIGRATE-N finds AP herds share few effective migrants with other herds, with South AP and Unimak Island herds having the least. Bayesian clustering techniques are able to resolve all but Denali and Mulchatna caribou herds. Using a conservative assignment threshold of qreindeer ≥ 0.2, 3% of caribou show signs of domestic introgression. Denali herd has the most introgressed individuals (6.9%); those caribou herds that were historically adjacent to smaller reindeer herds, or were historically without adjacent herding, show no admixture. This domestic introgression persists despite the lack of managed reindeer in the region since the 1940s. Our results suggest that despite previous movement data indicating metapopulation like dispersal in this region, there may be unknown barriers to reproduction by dispersing individuals. Finally, our results support findings that wild and domestic Rangifer can hybridize, and show this introgression may persist dozens of generations after domestics are no longer present. |
format |
Article in Journal/Newspaper |
author |
Colson, Kevin E. Mager, Karen H. Hundertmark, Kris J. |
author_facet |
Colson, Kevin E. Mager, Karen H. Hundertmark, Kris J. |
author_sort |
Colson, Kevin E. |
title |
Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
title_short |
Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
title_full |
Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
title_fullStr |
Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
title_full_unstemmed |
Data from: Reindeer introgression and the population genetics of caribou in Southwestern Alaska |
title_sort |
data from: reindeer introgression and the population genetics of caribou in southwestern alaska |
publishDate |
2014 |
url |
http://hdl.handle.net/10255/dryad.62162 https://doi.org/10.5061/dryad.9qh56 |
op_coverage |
Alaska Alaska peninsula Unimak Island |
genre |
Rangifer tarandus Alaska |
genre_facet |
Rangifer tarandus Alaska |
op_relation |
doi:10.5061/dryad.9qh56/1 doi:10.1093/jhered/esu030 PMID:24842565 doi:10.5061/dryad.9qh56 Colson KE, Mager KH, Hundertmark KJ (2014) Reindeer introgression and the population genetics of caribou in Southwestern Alaska. Journal of Heredity 105(5): 585-596. http://hdl.handle.net/10255/dryad.62162 |
op_doi |
https://doi.org/10.5061/dryad.9qh56 https://doi.org/10.5061/dryad.9qh56/1 https://doi.org/10.1093/jhered/esu030 |
_version_ |
1766175773096411136 |