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Tytuł pozycji:

Persistence of an endangered native duck, feral mallards, and multiple hybrid swarms across the main Hawaiian Islands.

Tytuł :
Persistence of an endangered native duck, feral mallards, and multiple hybrid swarms across the main Hawaiian Islands.
Autorzy :
Wells CP; Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, CA, USA.
Lavretsky P; Department of Biological Sciences, University of Texas, El Paso, TX, USA.
Sorenson MD; Department of Biology, Boston University, Boston, MA, USA.
Peters JL; Department of Biological Sciences, Wright State University, Dayton, OH, USA.
DaCosta JM; Department of Biology, Boston College, Chestnut Hill, MA, USA.
Turnbull S; Division of Forestry and Wildlife, Department of Land and Natural Resources, Honolulu, HI, USA.
Uyehara KJ; Kaua'i National Wildlife Refuge Complex, U.S. Fish and Wildlife Service, Kīlauea, HI, USA.
Malachowski CP; Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR, USA.
Dugger BD; Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR, USA.
Eadie JM; Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, CA, USA.
Engilis A Jr; Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, CA, USA.; Museum of Wildlife and Fish Biology, University of California, Davis, CA, USA.
Pokaż więcej
Źródło :
Molecular ecology [Mol Ecol] 2019 Dec; Vol. 28 (24), pp. 5203-5216. Date of Electronic Publication: 2019 Nov 18.
Typ publikacji :
Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.
Język :
English
Imprint Name(s) :
Original Publication: Oxford, UK : Blackwell Scientific Publications, c1992-
MeSH Terms :
Evolution, Molecular*
Hybridization, Genetic*
Ducks/*genetics
Genetic Variation/*genetics
Animals ; Biological Evolution ; DNA/genetics ; Endangered Species ; Genotype ; Hawaii ; Islands
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Contributed Indexing :
Keywords: Hawaiian duck*; conservation genetics*; evolution*; genetic extinction*; hybridization*; island biogeography*
Molecular Sequence :
GENBANK MN563303; MN563571; MN603671; MN603691; EU399761; EU399785; KF608499; KF608500; KF857646; KF857649; KP856505; KP856508; MK425362; MK425493; KF608512; KF608513; KP856504; KP56513; MN563303MN603671
Substance Nomenclature :
9007-49-2 (DNA)
Entry Date(s) :
Date Created: 20191119 Date Completed: 20200616 Latest Revision: 20200616
Update Code :
20201023
DOI :
10.1111/mec.15286
PMID :
31736171
Czasopismo naukowe
Interspecific hybridization is recognized as an important process in the evolutionary dynamics of both speciation and the reversal of speciation. However, our understanding of the spatial and temporal patterns of hybridization that erode versus promote species boundaries is incomplete. The endangered, endemic koloa maoli (or Hawaiian duck, Anas wyvilliana) is thought to be threatened with genetic extinction through ongoing hybridization with an introduced congener, the feral mallard (A. platyrhynchos). We investigated spatial and temporal variation in hybrid prevalence in populations throughout the main Hawaiian Islands, using genomic data to characterize population structure of koloa, quantify the extent of hybridization, and compare hybrid proportions over time. To accomplish this, we genotyped 3,308 double-digest restriction-site-associated DNA (ddRAD) loci in 425 putative koloa, mallards, and hybrids from populations across the main Hawaiian Islands. We found that despite a population decline in the last century, koloa genetic diversity is high. There were few hybrids on the island of Kaua'i, home to the largest population of koloa. By contrast, we report that sampled populations outside of Kaua'i can now be characterized as hybrid swarms, in that all individuals sampled were of mixed koloa × mallard ancestry. Further, there is some evidence that these swarms are stable over time. These findings demonstrate spatial variation in the extent and consequences of interspecific hybridization, and highlight how islands or island-like systems with small population sizes may be especially prone to genetic extinction when met with a congener that is not reproductively isolated.
(© 2019 John Wiley & Sons Ltd.)

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