Publikasjoner
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Jourdain, Eve Marie; Karoliussen, Richard; Fordyce Martin, Sarah L.; Langangen, Øystein Ole Gahr; Robeck, Todd & Borgå, Katrine
[Vis alle 8 forfattere av denne artikkelen]
(2024).
Social and genetic connectivity despite ecological variation in a killer whale network.
Proceedings of the Royal Society of London. Biological Sciences.
ISSN 0962-8452.
291(2021).
doi:
10.1098/rspb.2024.0524.
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Laine, Jan Tapio; Mak, Sarah S.T.; Martins, Nuno F.G.; Chen, Xihan; Gilbert, Marcus Thomas Pius & Jones, Felicity C.
[Vis alle 9 forfattere av denne artikkelen]
(2024).
Late Pleistocene stickleback environmental genomes reveal the chronology of freshwater adaptation.
Current Biology.
ISSN 0960-9822.
34(5),
s. 1142–1147.e6.
doi:
10.1016/j.cub.2024.01.056.
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Foote, Andrew; Hooper, Rebecca; Alexander, Alana; Baird, Robin; Baker, Charles Scott & Ballance, Lisa
[Vis alle 34 forfattere av denne artikkelen]
(2021).
Runs of homozygosity in killer whale genomes provide a global record of demographic histories.
Molecular Ecology.
ISSN 0962-1083.
30(23),
s. 6162–6177.
doi:
10.1111/mec.16137.
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Runs of homozygosity (ROH) occur when offspring inherit haplotypes that are identical by descent from each parent. Length distributions of ROH are informative about population history; specifically, the probability of inbreeding mediated by mating system and/or population demography. Here, we investigate whether variation in killer whale (Orcinus orca) demographic history is reflected in genome-wide heterozygosity and ROH length distributions, using a global dataset of 26 genomes representative of geographic and ecotypic variation in this species, and two F1 admixed individuals with Pacific-Atlantic parentage. We first reconstruct demographic history for each population as changes in effective population size through time using the pairwise sequential Markovian coalescent (PSMC) method. We find a subset of populations declined in effective population size during the Late Pleistocene, while others had more stable demography. Genomes inferred to have undergone ancestral declines in effective population size, were autozygous at hundreds of short ROH (1.5 Mb) were found in low latitude populations, and populations of known conservation concern. These include a Scottish killer whale, for which 37.8% of the autosomes were comprised of ROH >1.5 Mb in length. The fate of this population, in which only two adult males have been sighted in the past five years, and zero fecundity over the last two decades, may be inextricably linked to its demographic history and consequential inbreeding depression.
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Kirch, Melanie; Romundset, Anders; Gilbert, Marcus Thomas Pius; Jones, Felicity C. & Foote, Andrew
(2021).
Ancient and modern stickleback genomes reveal the demographic constraints on adaptation.
Current Biology.
ISSN 0960-9822.
31,
s. 2027–2036.
doi:
10.1016/j.cub.2021.02.027.
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Adaptation is typically studied by comparing modern populations with contrasting environments. Individuals persisting in the ancestral habitat are typically used to represent the ancestral founding population; however, it has been questioned whether these individuals are good proxies for the actual ancestors.1 To address this, we applied a paleogenomics approach2 to directly access the ancestral genepool: partially sequencing the genomes of two 11- to 13,000-year-old stickleback recovered from the transitionary layer between marine and freshwater sediments of two Norwegian isolation lakes3 and comparing them with 30 modern stickleback genomes from the same lakes and adjacent marine fjord, in addition to a global dataset of 20 genomes.4 The ancient stickleback shared genome-wide ancestry with the modern fjord population, whereas modern lake populations have lost substantial ancestral variation following founder effects, and subsequent drift and selection. Freshwater-adaptive alleles found in one ancient stickleback genome have not risen to high frequency in the present-day population from the same lake. Comparison to the global dataset suggested incomplete adaptation to freshwater in our modern lake populations. Our findings reveal the impact of population bottlenecks in constraining adaptation due to reduced efficacy of selection on standing variation present in founder populations.
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Foote, Andrew
(2022).
Are “Type 2” killer whales long in the tooth? A critical reflection on the discrete categorization of Northeast Atlantic killer whales.
Marine mammal science.
ISSN 0824-0469.
doi:
10.1111/mms.12964.
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Taylor, Rebecca S.; Jensen, Evelyn L.; Coltman, David; Foote, Andrew & Lamichhaney, Sangeet
(2021).
Seeing the whole picture: What molecular ecology is gaining from whole genomes.
Molecular Ecology.
ISSN 0962-1083.
30(23),
s. 5917–5922.
doi:
10.1111/mec.16282.
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Taylor, Rebecca S.; Jensen, Evelyn L.; Coltman, David; Foote, Andrew & Lamichhaney, Sangeet
(2021).
Seeing the whole picture: What molecular ecology is gaining from whole genomes.
Molecular Ecology.
ISSN 0962-1083.
30,
s. 5917–5922.
doi:
10.1111/mec.16282.
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Tiller, Kristin; Ellingsen, Ellen J. Grav; Ekrem, Torbjørn; Alsli, Lise Mariann Bolstad; Austrheim, Gunnar & Bendiksby, Mika
[Vis alle 26 forfattere av denne artikkelen]
(2019).
(Dis)Harmoni i hjemlandet – Masterplan for Nye Hovedutstillinger ved NTNU Vitenskapsmuseet.
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Publisert
25. mai 2023 16:14
- Sist endret
25. mai 2023 16:14