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| Current biology : CB. 2019 Jan 10. pii: S0960-9822(18)31609-9. doi: 10.1016/j.cub.2018.12.008. pmc: PMC6345625 |
| The Genomic Footprints of the Fall and Recovery of the Crested Ibis. |
| Feng S1, Fang Q2, Barnett R3, Li C4, Han S5, Kuhlwilm M6, Zhou L7, Pan H8, Deng Y9, Chen G10, Gamauf A11, Woog F12, Prys-Jones R13, Marques-Bonet T14, Gilbert MTP15, Zhang G16 |
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Abstract Human-induced environmental change and habitat fragmentation pose major threats to biodiversity and require active conservation efforts to mitigate their consequences. Genetic rescue through translocation and the introduction of variation into imperiled populations has been argued as a powerful means to preserve, or even increase, the genetic diversity and evolutionary potential of endangered species [1-4]. However, factors such as outbreeding depression [5, 6] and a reduction in available genetic diversity render the success of such approaches uncertain. An improved evaluation of the consequence of genetic restoration requires knowledge of temporal changes to genetic diversity before and after the advent of management programs. To provide such information, a growing number of studies have included small numbers of genomic loci extracted from historic and even ancient specimens [7, 8]. We extend this approach to its natural conclusion, by characterizing the complete genomic sequences of modern and historic population samples of the crested ibis (Nipponia nippon), an endangered bird that is perhaps the most successful example of how conservation effort has brought a species back from the brink of extinction. Though its once tiny population has today recovered to >2,000 individuals [9], this process was accompanied by almost half of ancestral loss of genetic variation and high deleterious mutation load. We furthermore show how genetic drift coupled to inbreeding following the population bottleneck has largely purged the ancient polymorphisms from the current population. In conclusion, we demonstrate the unique promise of exploiting genomic information held within museum samples for conservation and ecological research. |
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Copyright © 2018 The Author(s). Published by Elsevier Ltd.. All rights reserved. |
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KEYWORDS: ancient genomics, conservation genomics, demography, endangered species, extinction, genetic recovery, inbreeding, mutation load, ornithology, population genomics |
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Publikations ID: 30639104 Quelle: öffnen |
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