The risk of inbreeding versus outbreeding depression in managing an endangered and locally adapted population of a sedentary bird DOI Creative Commons
G. Walsh, Barry J. McMahon, Filip Thörn

et al.

Conservation Science and Practice, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract A debate in conservation genomics centers on whether to conserve small, fragmented populations independently or blend them through translocations from larger populations. Translocations of red grouse ( Lagopus scotica ) Great Britain supplement the Irish population have been suggested. We incorporate a variety genetic datasets address this. used genome wide data 23 contemporary and historic Ireland. also investigate microsatellite data, sequence candidate pigmentation genes, assess phenotypic color variation. Genomic indicate higher inbreeding relative an English significant divergence for genomic F ST = 0.095) 0.03) markers. Contemporary N e was seven times smaller compared English. identified divergent regions linked pigmentation, immune response, food intake. show differences plumage among coding melanin pathway including MC1R 0.3). The two thus appear locally adapted this between source target when can swamp alleles and/or introduce maladapted genotypes, leading outbreeding depression. While it is important avoid by sustaining populations, our research emphasizes need practitioners consider local adaptation. advocate against Ireland as strategy particular case underscore importance prioritizing where possible.

Language: Английский

The evolutionary history of the field vole species complex revealed by modern and ancient genomes DOI Creative Commons
Mateusz Baca,

Barbara Bujalska,

Danijela Popović

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Background The field vole, an abundant and widespread microtine rodent, is a complex comprising three cryptic species. short-tailed vole (Microtus agrestis) present over much of Eurasia, the Mediterranean lavernedii) in southern Europe, Portuguese rozianus) limited to western Spain Portugal. Previous research has shown high genomic differentiation these lineages; however, details process underlying their divergence remain unknown. Results We analysed 46 mitogenomes 16 nuclear genomes modern specimens, 75 12 ancient specimens spanning last thousand years, investigate evolutionary history this species complex. estimated from voles be ca. 220 ka ago latter 110 ago, earlier than previous estimates involving only sequences. times we obtained match those between major mitochondrial lineages cold-adapted steppe rodents Europe. found signatures gene flow within lineages, with some analyses suggesting hybrid origin lineage. Ancient Italian Peninsula revealed previously unrecognised lineage that showed evidence genetic exchange other populations. Conclusions pattern variation demonstrates unequivocally impact stadial-interstadial cycles generating recurrent episodes allopatry connectivity populations, situation which could by our dense sampling time.

Language: Английский

Citations

0
Island archaeology provides ecological and behavioral analogs for off-planet exploration and colonization DOI
Thomas P. Leppard, Scott M. Fitzpatrick

Futures, Journal Year: 2025, Volume and Issue: unknown, P. 103544 - 103544

Published: Jan. 1, 2025

Language: Английский

Citations

0
Unraveling genetic load dynamics during biological invasion: insights from two invasive insect species DOI Creative Commons
Éric Lombaert,

Aurélie Blin,

Barbara Porro

et al.

Peer Community Journal, Journal Year: 2025, Volume and Issue: 5

Published: April 2, 2025

Language: Английский

Citations

0
Constraints to gene flow increase the risk of genome erosion in the Ngorongoro Crater lion population DOI Creative Commons
Nicolás Dussex, Ingela Jansson, Tom van der Valk

et al.

Communications Biology, Journal Year: 2025, Volume and Issue: 8(1)

Published: April 21, 2025

Abstract Small, isolated populations are at greater risk of genome erosion than larger populations. Successful conservation efforts may lead to demographic recovery and mitigate the negative genetic effects bottlenecks. However, constrained gene flow can hamper genomic recovery. Here, we use population analyses forward simulations assess impacts near extinction in Ngorongoro Crater lion ( Panthera leo ) sub-population. We show that 200 years quasi-isolation recent epizootic 1962 resulted a two-fold increase inbreeding an excess frequency highly deleterious mutations relative other Greater Serengeti. There was little evidence for purging load. Furthermore, indicate higher from outside is needed prevent future population, with minimum one five effective male migrants per decade required reduce long-term depression reduction diversity. Our results suggest spite rapid post-epizootic since 1970s, continued isolation driven by habitat fragmentation potentially territoriality, exacerbate erosion.

Language: Английский

Citations

0
Adaptation to the High-Arctic island environment despite long-term reduced genetic variation in Svalbard reindeer DOI Creative Commons
Nicolás Dussex, Ole K. Tørresen, Tom van der Valk

et al.

iScience, Journal Year: 2023, Volume and Issue: 26(10), P. 107811 - 107811

Published: Sept. 3, 2023

Language: Английский

Citations

8
Genome-wide support for incipient Tula hantavirus species within a single rodent host lineage DOI Creative Commons
Anton Labutin, Gerald Heckel

Virus Evolution, Journal Year: 2024, Volume and Issue: 10(1)

Published: Jan. 1, 2024

Abstract Evolutionary divergence of viruses is most commonly driven by co-divergence with their hosts or through isolation transmission after host shifts. It remains mostly unknown, however, whether divergent phylogenetic clades within named virus species represent functionally equivalent byproducts high evolutionary rates rather incipient species. Here, we test these alternatives genomic data from two widespread in Tula orthohantavirus (TULV) a single lineage natural rodent host, the common vole Microtus arvalis. We examined voles forty-two locations contact region between for TULV infection reverse transcription (RT)-PCR. Sequencing yielded twenty-three Central North and twenty-one South genomes, which differed 14.9–18.5 per cent at nucleotide 2.2–3.7 amino acid (AA) level without evidence recombination reassortment clades. Geographic cline analyses demonstrated an abrupt (<1 km wide) transition parapatric continuous landscape. This was located mitochondrial M. arvalis, polymorphisms showed gradual mixing populations across it. Genomic differentiation much weaker to than nearby hybrid zone lineages host. suggest that distinct, species, are likely differently affected genetic highlights potential viral zones as systems investigating factors enabling restricting RNA viruses.

Language: Английский

Citations

2
Inbreeding and cognition in wild populations: a relationship that remains unnoticed DOI Creative Commons
Ioanna Gavriilidi, Lisa Van Linden

Oikos, Journal Year: 2024, Volume and Issue: 2024(9)

Published: July 18, 2024

Anthropogenic activities are causing a steep decline of wildlife populations. Increased inbreeding in shrinking populations can substantially curb individual fitness and population viability. One potentially important but largely ignored component depression may be cognitive decline. Cognition affects an animal's capacity to respond environmental disturbance, which, the face global change, make difference between persistence extinction. While effects on performance have been relatively well documented humans, they remain unexplored natural Here we review current (limited) knowledge whether how impinges animals' abilities. Insights into relationship cognition could prove valuable not only for comprehending development evolution also conservation.

Language: Английский

Citations

2
Genome-wide relaxation of selection and the evolution of the island syndrome in Orkney voles DOI
Xuejing Wang, Gerald Heckel

Genome Research, Journal Year: 2024, Volume and Issue: 34(6), P. 851 - 862

Published: June 1, 2024

Island populations often experience different ecological and demographic conditions than their counterparts on the continent, resulting in divergent evolutionary forces affecting genomes. Random genetic drift selection both may leave imprints island populations, although relative impact depends strongly specific conditions. Here we address contributions to syndrome a rodent with an unusually clear history of isolation. Common voles (

Language: Английский

Citations

1
Purging of highly deleterious alleles through an extreme bottleneck DOI Creative Commons
Oliver Stuart,

Rohan Cleave,

Kate Pearce

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: July 24, 2024

Abstract Transitions to captivity often produce population bottlenecks. On one hand, bottlenecks increase inbreeding and decrease effective size, thus increasing extinction risk. the other, elevated homozygosity associated with extreme may purge deleterious alleles. Previous studies of purging in captive breeding programs have focused on phenotypic measurements be confounded environmental effects. We test ability natural selection alleles following an bottleneck by analysing patterns genetic diversity wild captive-bred populations Lord Howe Island stick insect ( Dryococelus australis ). has been bred for two decades, having passed through – only mating pairs few new additions since then. The magnitude bottleneck, together fact that each female lays hundreds eggs most which are not recruited, set up nearly ideal conditions As expected, individuals had a greater number long runs-of-homozygosity compared individuals, implying strong would facilitate homozygous regions. Stop-codon frameshift were preferentially depleted other alleles, coding non-coding more allele was predicted be, likely it found outside runs-of-homozygosity, events expression removal even after such under benign captivity. These data show decreased mutation load insects, though loss make future adaptation difficult.

Language: Английский

Citations

1
Unraveling genetic load dynamics during biological invasion: insights from two invasive insect species DOI Creative Commons
Éric Lombaert,

Aurélie Blin,

Barbara Porro

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 3, 2024

Many invasive species undergo a significant reduction in genetic diversity, i.e. bottleneck, the early stages of invasion. However, this does not necessarily prevent them from achieving considerable ecological success and becoming highly efficient colonizers. Here we tested so-called purge hypothesis, which suggests that demographic bottlenecks may indeed help to deleterious mutations, thereby reducing load. We used transcriptome-based exome capture protocol identify thousands SNPs coding regions native populations two successful insect species, western corn rootworm (Chrysomelidae: Diabrotica virgifera virgifera) harlequin ladybird (Coccinelidae: Harmonia axyridis). categorized polarized investigate changes load between their sources. Our results varied species. In D. virgifera, although there was general diversity populations, including associated with load, found no clear evidence for purging, except marginally strongly mutations one European population. Conversely, H. axyridis, minimal, detected signs fixation populations. These findings provide new insights into evolution during invasions, but do offer definitive answer hypothesis. Future research should include larger genomic datasets broader range further elucidate these dynamics.

Language: Английский

Citations

1