Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation
ABSTRACT Translocating individuals from multiple source populations is one way to bolster genetic variation and avoid inbreeding in newly established populations. However, mixing isolated populations, especially from islands, can potentially lead to outbreeding depression and/or assortative mating,...
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2025-01-01
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| Series: | Evolutionary Applications |
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| Online Access: | https://doi.org/10.1111/eva.70073 |
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| author | Rujiporn Thavornkanlapachai Harriet R. Mills Kym Ottewell Cathy Lambert J. Anthony Friend Daniel J. White Zahra Aisya W. Jason Kennington |
| author_facet | Rujiporn Thavornkanlapachai Harriet R. Mills Kym Ottewell Cathy Lambert J. Anthony Friend Daniel J. White Zahra Aisya W. Jason Kennington |
| author_sort | Rujiporn Thavornkanlapachai |
| collection | DOAJ |
| description | ABSTRACT Translocating individuals from multiple source populations is one way to bolster genetic variation and avoid inbreeding in newly established populations. However, mixing isolated populations, especially from islands, can potentially lead to outbreeding depression and/or assortative mating, which may limit interbreeding between source populations. Here, we investigated genetic consequences of mixing individuals from two island populations of the dibbler (Parantechinus apicalis) in an island translocation. Despite a high level of genetic divergence between the source populations (FST ranges 0.33–0.64), and significant differences in body size, individuals with different ancestries were able to successfully interbreed in captivity and in the wild. However, the genetic contributions from each source population were unequal initially despite each of the source populations contributing an equal number of founders. Mating success of captive animals based on the pedigree suggests that this bias toward one source population was due to founder mortality and the mating success of younger and heavier animals. Nevertheless, genetic contributions in the translocated population became equal over time with no parental purebreds, suggesting an extreme excess of hybrids across multiple years. While genetic variation in the translocated population was comparable or higher than the source populations, the increase was short‐lived. Genetic composition of captive animals may not reflect what happens in the wild. These changes post‐translocation highlight the need for continued genetic monitoring. |
| format | Article |
| id | doaj-art-a186ca6e164c4524b4e599059ade5d35 |
| institution | Kabale University |
| issn | 1752-4571 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Evolutionary Applications |
| spelling | doaj-art-a186ca6e164c4524b4e599059ade5d352025-02-07T03:58:50ZengWileyEvolutionary Applications1752-45712025-01-01181n/an/a10.1111/eva.70073Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic VariationRujiporn Thavornkanlapachai0Harriet R. Mills1Kym Ottewell2Cathy Lambert3J. Anthony Friend4Daniel J. White5Zahra Aisya6W. Jason Kennington7School of Biological Sciences The University of Western Australia Crawley Western Australia AustraliaDepartment of Biodiversity, Conservation and Attractions Biodiversity and Conservation Science Bentley Western Australia AustraliaSchool of Biological Sciences The University of Western Australia Crawley Western Australia AustraliaDepartment of Biodiversity, Conservation and Attractions Biodiversity and Conservation Science Bentley Western Australia AustraliaDepartment of Biodiversity, Conservation and Attractions Biodiversity and Conservation Science Albany Western Australia AustraliaSchool of Biological Sciences The University of Western Australia Crawley Western Australia AustraliaSchool of Biological Sciences The University of Western Australia Crawley Western Australia AustraliaSchool of Biological Sciences The University of Western Australia Crawley Western Australia AustraliaABSTRACT Translocating individuals from multiple source populations is one way to bolster genetic variation and avoid inbreeding in newly established populations. However, mixing isolated populations, especially from islands, can potentially lead to outbreeding depression and/or assortative mating, which may limit interbreeding between source populations. Here, we investigated genetic consequences of mixing individuals from two island populations of the dibbler (Parantechinus apicalis) in an island translocation. Despite a high level of genetic divergence between the source populations (FST ranges 0.33–0.64), and significant differences in body size, individuals with different ancestries were able to successfully interbreed in captivity and in the wild. However, the genetic contributions from each source population were unequal initially despite each of the source populations contributing an equal number of founders. Mating success of captive animals based on the pedigree suggests that this bias toward one source population was due to founder mortality and the mating success of younger and heavier animals. Nevertheless, genetic contributions in the translocated population became equal over time with no parental purebreds, suggesting an extreme excess of hybrids across multiple years. While genetic variation in the translocated population was comparable or higher than the source populations, the increase was short‐lived. Genetic composition of captive animals may not reflect what happens in the wild. These changes post‐translocation highlight the need for continued genetic monitoring.https://doi.org/10.1111/eva.70073body sizecaptive breedinggenetic erosionintraspecific hybridizationmate choicetranslocation |
| spellingShingle | Rujiporn Thavornkanlapachai Harriet R. Mills Kym Ottewell Cathy Lambert J. Anthony Friend Daniel J. White Zahra Aisya W. Jason Kennington Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation Evolutionary Applications body size captive breeding genetic erosion intraspecific hybridization mate choice translocation |
| title | Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation |
| title_full | Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation |
| title_fullStr | Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation |
| title_full_unstemmed | Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation |
| title_short | Diverged Populations Admixture Bolsters Genetic Diversity of a New Island Dibbler (Parantechinus apicalis) Population, but Does Not Prevent Subsequent Loss of Genetic Variation |
| title_sort | diverged populations admixture bolsters genetic diversity of a new island dibbler parantechinus apicalis population but does not prevent subsequent loss of genetic variation |
| topic | body size captive breeding genetic erosion intraspecific hybridization mate choice translocation |
| url | https://doi.org/10.1111/eva.70073 |
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