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Historic and modern genomes unveil a domestic introgression gradient in a wild red junglefowl population
Wu, Meng Yue Low, Gabriel Weijie Forcina, Giovanni Lee, Benjamin P Y‐H Oh, Rachel Rui Ying Rheindt, Frank E
Wu, Meng Yue
Low, Gabriel Weijie
Forcina, Giovanni
Lee, Benjamin P Y‐H
Oh, Rachel Rui Ying
Rheindt, Frank E
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2020-05-21
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2021-02-09
Subject Terms
admixture
conservation genomics
genetic swamping
phenotypic introgression
South‐East Asia
conservation genomics
genetic swamping
phenotypic introgression
South‐East Asia
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The red junglefowl Gallus gallus is the ancestor of the domestic chicken and arguably the most important bird species on Earth. Continual gene flow between domestic and wild populations has compromised its gene pool, especially since the last century when human encroachment and habitat loss would have led to increased contact opportunities. We present the first combined genomic and morphological admixture assessment of a native population of red junglefowl, sampled from recolonized parts of its former range in Singapore, partly using whole genomes resequenced from dozens of individuals. Crucially, this population was genomically anchored to museum samples from adjacent Peninsular Malaysia collected ~110–150 years ago to infer the magnitude of modern domestic introgression across individuals. We detected a strong feral–wild genomic continuum with varying levels of domestic introgression in different subpopulations across Singapore. Using a trait scoring scheme, we determined morphological thresholds that can be used by conservation managers to successfully identify individuals with low levels of domestic introgression, and selected traits that were particularly useful for predicting domesticity in genomic profiles. Our study underscores the utility of combined genomic and morphological approaches in population management and suggests a way forward to safeguard the allelic integrity of wild red junglefowl in perpetuity.
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Wu, MY, Low, GW, Forcina, G, et al. Historic and modern genomes unveil a domestic introgression gradient in a wild red junglefowl population. Evol Appl. 2020; 13: 2300– 2315. https://doi.org/10.1111/eva.13023
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© 2020 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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1752-4571
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1752-4571
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openAccess