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López A, Carreras C, Pascual M, Pegueroles C. Evaluating restriction enzyme selection for reduced representation sequencing in conservation genomics. Mol Ecol Resour 2023. [PMID: 37706675 DOI: 10.1111/1755-0998.13865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 07/28/2023] [Accepted: 08/09/2023] [Indexed: 09/15/2023]
Abstract
Conservation genomic studies in non-model organisms generally rely on reduced representation sequencing techniques based on restriction enzymes to identify population structure as well as candidate loci for local adaptation. While the expectation is that the reduced representation of the genome is randomly distributed, the proportion of the genome sampled might depend on the GC content of the recognition site of the restriction enzyme used. Here, we evaluated the distribution and functional composition of loci obtained after a reduced representation approach using Genotyping-by-Sequencing (GBS). To do so, we compared experimental data from two endemic fish species (Symphodus ocellatus and Symphodus tinca, EcoT22I enzyme) and two ecosystem engineer sea urchins (Paracentrotus lividus and Arbacia lixula, ApeKI enzyme). In brief, we mapped the sequenced loci to the phylogenetically closest reference genome available (Labrus bergylta in the fish and Strongylocentrotus purpuratus in the sea urchin datasets), classified them as exonic, intronic and intergenic, and studied their function by using Gene Ontology (GO) terms. We also simulated the effect of using both enzymes in the two reference genomes. In both simulated and experimental data, we detected an enrichment towards exonic or intergenic regions depending on the restriction enzyme used and failed to detect differences between total loci and candidate loci for adaptation in the empirical dataset. Most of the functions assigned to the mapped loci were shared between the four species and involved a myriad of general functions. Our results highlight the importance of restriction enzyme selection and the need for high-quality annotated genomes in conservation genomic studies.
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Affiliation(s)
- Ainhoa López
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Carlos Carreras
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Marta Pascual
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Cinta Pegueroles
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
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2
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Leiva C, Pérez-Sorribes L, González-Delgado S, Ortiz S, Wangensteen OS, Pérez-Portela R. Exceptional population genomic homogeneity in the black brittle star Ophiocomina nigra (Ophiuroidea, Echinodermata) along the Atlantic-Mediterranean coast. Sci Rep 2023; 13:12349. [PMID: 37524805 PMCID: PMC10390532 DOI: 10.1038/s41598-023-39584-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 07/27/2023] [Indexed: 08/02/2023] Open
Abstract
The Atlantic-Mediterranean marine transition is characterised by strong oceanographic barriers and steep environmental gradients that generally result in connectivity breaks between populations from both basins and may lead to local adaptation. Here, we performed a population genomic study of the black brittle star, Ophiocomina nigra, covering most of its distribution range along the Atlantic-Mediterranean region. Interestingly, O. nigra is extremely variable in its coloration, with individuals ranging from black to yellow-orange, and different colour morphs inhabiting different depths and habitats. In this work, we used a fragment of the mitochondrial COI gene and 2,374 genome-wide ddRADseq-derived SNPs to explore: (a) whether the different colour morphs of O. nigra represent different evolutionary units; (b) the disruptive effects of major oceanographic fronts on its population structure; and (c) genomic signals of local adaptation to divergent environments. Our results revealed exceptional population homogeneity, barely affected by oceanographic fronts, with no signals of local adaptation nor genetic differentiation between colour morphs. This remarkable panmixia likely results from a long pelagic larval duration, a large effective population size and recent demographic expansions. Our study unveils an extraordinary phenotypic plasticity in O. nigra, opening further research questions on the ecological and molecular mechanisms underpinning coloration in Ophiuroidea.
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Affiliation(s)
- Carlos Leiva
- Departament de Biologia Evolutiva, Facultat de Biologia, Ecologia i Ciències Ambientals, Universitat de Barcelona (UB), Av. Diagonal 643, 08028, Barcelona, Spain.
- University of Guam Marine Laboratory, 303 University Drive, Mangilao, GU, 96923, USA.
| | - Laia Pérez-Sorribes
- Departament de Biologia Evolutiva, Facultat de Biologia, Ecologia i Ciències Ambientals, Universitat de Barcelona (UB), Av. Diagonal 643, 08028, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Sara González-Delgado
- Departamento de Biología Animal, Edafología y Geología, Facultad de Ciencias, Universidad de la Laguna, Canary Islands, Spain
| | - Sandra Ortiz
- Departament de Biologia Evolutiva, Facultat de Biologia, Ecologia i Ciències Ambientals, Universitat de Barcelona (UB), Av. Diagonal 643, 08028, Barcelona, Spain
| | - Owen S Wangensteen
- Departament de Biologia Evolutiva, Facultat de Biologia, Ecologia i Ciències Ambientals, Universitat de Barcelona (UB), Av. Diagonal 643, 08028, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Rocío Pérez-Portela
- Departament de Biologia Evolutiva, Facultat de Biologia, Ecologia i Ciències Ambientals, Universitat de Barcelona (UB), Av. Diagonal 643, 08028, Barcelona, Spain.
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain.
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Haye PA, Segovia NI. Shedding light on variation in reproductive success through studies of population genetic structure in a Southeast Pacific Coast mussel. Heredity (Edinb) 2023; 130:402-413. [PMID: 37024547 PMCID: PMC10238476 DOI: 10.1038/s41437-023-00615-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 04/08/2023] Open
Abstract
Phylogeography often focuses on the spatial dimension of genetic diversity, rarely including the temporal dynamics occurring interannually among local populations, which can provide insight into past variations in reproductive success. Currently, there is an intense aquaculture industry of Mytilus spp. on the Southeast Pacific Coast which depends entirely on the spat released by natural populations forming a relevant and sensitive social-ecological system. Temporal and spatial spat variability from natural mussel beds could be related to interannual reproductive dynamics with variable reproductive success and recruitment, which leave genetic signatures. Temporal and spatial genetic structure was evaluated in six natural beds in the Southeast Pacific (from 39°25'S to 43°07'S) on the most abundant and widespread Mytilus lineage detected, Mytilus cf. chilensis, in 4 consecutive years. Analyses included data from >180 individuals per year, with a total of 751 (mitochondrial COI) and 747 (nuclear H1) individuals, respectively. Overall, both markers showed high haplotype diversity and low spatial and temporal genetic differentiation. Likely, the high dispersal capacity of Mytilus cf. chilensis maintains population homogeneity and prevents diversity erosion. The slight differences in genetic variance of COI were better explained by differences among sites (space), and conversely, the H1 genetic variance was better explained by interannual (temporal) comparisons, which could explain temporal variability in spat availability. This study highlights the important insights achieved with the evaluation of both temporal and spatial population genetic structures in marine species with high reproductive output, which can condition the success and sustainability of the relevant social-ecological system.
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Affiliation(s)
- Pilar A Haye
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago, Chile
| | - Nicolás I Segovia
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile.
- Instituto Milenio en Socio-Ecología Costera (SECOS), Santiago, Chile.
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4
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Spatial coalescent connectivity through multi-generation dispersal modelling predicts gene flow across marine phyla. Nat Commun 2022; 13:5861. [PMID: 36195609 PMCID: PMC9532449 DOI: 10.1038/s41467-022-33499-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 09/21/2022] [Indexed: 11/08/2022] Open
Abstract
Gene flow governs the contemporary spatial structure and dynamic of populations as well as their long-term evolution. For species that disperse using atmospheric or oceanic flows, biophysical models allow predicting the migratory component of gene flow, which facilitates the interpretation of broad-scale spatial structure inferred from observed allele frequencies among populations. However, frequent mismatches between dispersal estimates and observed genetic diversity prevent an operational synthesis for eco-evolutionary projections. Here we use an extensive compilation of 58 population genetic studies of 47 phylogenetically divergent marine sedentary species over the Mediterranean basin to assess how genetic differentiation is predicted by Isolation-By-Distance, single-generation dispersal and multi-generation dispersal models. Unlike previous approaches, the latter unveil explicit parents-to-offspring links (filial connectivity) and implicit links among siblings from a common ancestor (coalescent connectivity). We find that almost 70 % of observed variance in genetic differentiation is explained by coalescent connectivity over multiple generations, significantly outperforming other models. Our results offer great promises to untangle the eco-evolutionary forces that shape sedentary population structure and to anticipate climate-driven redistributions, altogether improving spatial conservation planning.
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Foo SA, Munari M, Gambi MC, Byrne M. Acclimation to low pH does not affect the thermal tolerance of Arbacia lixula progeny. Biol Lett 2022; 18:20220087. [PMID: 35642383 DOI: 10.1098/rsbl.2022.0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
As the ocean warms, the thermal tolerance of marine invertebrates is key to determining their distributional change, where acclimation to low pH may impact the thermal range of optimal development. We compared thermal tolerance of progeny from a low pH-acclimated sea urchin (Arbacia lixula) population from the CO2 vents of Ischia (Italy) and a nearby population living at ambient pH. The percentages of normally developing gastrulae and two-armed larvae were determined across 10 temperatures representing present and future temperature conditions (16-34°C). Vent-acclimated sea urchins showed a greater percentage of normal development at 24 h, with a larger optimal developmental temperature range than control sea urchins (12.3°C versus 5.4°C range, respectively). At 48 h, upper lethal temperatures for 50% survival with respect to ambient temperatures were similar between control (+6.8°C) and vent (+6.2°C) populations. Thus, acclimation to low pH did not impact the broad thermal tolerance of A. lixula progeny. With A. lixula's barrens-forming abilities, its wide thermotolerance and its capacity to acclimate to low pH, this species will continue to be an important ecological engineer in Mediterranean macroalgal ecosystems in a changing ocean.
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Affiliation(s)
- Shawna A Foo
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Marco Munari
- Department of Integrative Marine Ecology, Ischia Marine Center, Stazione Zoologica Anton Dohrn, National Institute of Marine Biology, Ecology and Biotechnology, Punta San Pietro, Ischia, Naples 80077, Italy
| | - Maria Cristina Gambi
- National Institute of Oceanography and Applied Geophysics, OGS, Trieste, 34010, Italy
| | - Maria Byrne
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales 2006, Australia
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Pérez-Portela R, Garcia-Cisneros A, Campos-Canet M, Palacín C. Genetic homogeneity, lack of larvae recruitment, and clonality in absence of females across western Mediterranean populations of the starfish Coscinasterias tenuispina. Sci Rep 2021; 11:16819. [PMID: 34413402 PMCID: PMC8376918 DOI: 10.1038/s41598-021-96331-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 08/05/2021] [Indexed: 02/07/2023] Open
Abstract
We here analysed the populations' genetic structure of Coscinasterias tenuispina, an Atlantic-Mediterranean fissiparous starfish, focusing on the western Mediterranean, to investigate: the distribution and prevalence of genetic variants, the relative importance of asexual reproduction, connectivity across the Atlantic-Mediterranean transition, and the potential recent colonisation of the Mediterranean Sea. Individuals from 11 Atlantic-Mediterranean populations of a previous study added to 172 new samples from five new W Mediterranean sites. Individuals were genotyped at 12 microsatellite loci and their gonads histologically analysed for sex determination. Additionally, four populations were genotyped at two-time points. Results demonstrated genetic homogeneity and low clonal richness within the W Mediterranean, due to the dominance of a superclone, but large genetic divergence with adjacent areas. The lack of new genotypes recruitment over time, and the absence of females, confirmed that W Mediterranean populations were exclusively maintained by fission and reinforced the idea of its recent colonization. The existence of different environmental conditions among basins and/or density-depend processes could explain this lack of recruitment from distant areas. The positive correlation between clonal richness and heterozygote excess suggests that most genetic diversity is retained within individuals in the form of heterozygosity in clonal populations, which might increase their resilience.
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Affiliation(s)
- Rocío Pérez-Portela
- grid.5841.80000 0004 1937 0247Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, 643 Diagonal Avenue, 08028 Barcelona, Spain ,grid.5841.80000 0004 1937 0247Research Institute of Biodiversity (IRBIO), University of Barcelona, Barcelona, Spain
| | - Alex Garcia-Cisneros
- grid.5841.80000 0004 1937 0247Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, 643 Diagonal Avenue, 08028 Barcelona, Spain
| | - Marta Campos-Canet
- grid.5841.80000 0004 1937 0247Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, 643 Diagonal Avenue, 08028 Barcelona, Spain
| | - Creu Palacín
- grid.5841.80000 0004 1937 0247Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, 643 Diagonal Avenue, 08028 Barcelona, Spain ,grid.5841.80000 0004 1937 0247Research Institute of Biodiversity (IRBIO), University of Barcelona, Barcelona, Spain
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Pérez‐Portela R, Riesgo A, Wangensteen OS, Palacín C, Turon X. Enjoying the warming Mediterranean: Transcriptomic responses to temperature changes of a thermophilous keystone species in benthic communities. Mol Ecol 2020; 29:3299-3315. [DOI: 10.1111/mec.15564] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/08/2020] [Accepted: 07/20/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Rocío Pérez‐Portela
- Department of Evolutionary Biology, Ecology and Environmental Sciences University of Barcelona, and Research Institute of Biodiversity (IRBIO) Barcelona Spain
- Center for Advanced Studies of Blanes (CEAB, CSIC) Girona Spain
| | - Ana Riesgo
- Department of Life Sciences The Natural History Museum London UK
| | - Owen S. Wangensteen
- Norwegian College of Fishery Science UiT The Arctic University of Norway Tromsø Norway
| | - Cruz Palacín
- Department of Evolutionary Biology, Ecology and Environmental Sciences University of Barcelona, and Research Institute of Biodiversity (IRBIO) Barcelona Spain
| | - Xavier Turon
- Center for Advanced Studies of Blanes (CEAB, CSIC) Girona Spain
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8
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Individual-based population genomics reveal different drivers of adaptation in sympatric fish. Sci Rep 2020; 10:12683. [PMID: 32728037 PMCID: PMC7391720 DOI: 10.1038/s41598-020-69160-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 07/03/2020] [Indexed: 01/08/2023] Open
Abstract
Connectivity and local adaptation are two contrasting evolutionary forces highly influencing population structure. To evaluate the impact of early-life traits and environmental conditions on genetic structuring and adaptation, we studied two sympatric fish species in the Western Mediterranean Sea: Symphodus tinca and S. ocellatus. We followed an individual-based approach and measured early-life history traits from otolith readings, gathered information on environmental variables and obtained genome-wide markers from genotyping-by-sequencing (GBS). The two species presented contrasting population structure across the same geographic gradient, with high and significant population differentiation in S. ocellatus, mostly determined by oceanographic fronts, and low differentiation and no front effect in S. tinca. Despite their different levels of genetic differentiation, we identified in both species candidate regions for local adaptation by combining outlier analysis with environmental and phenotypic association analyses. Most candidate loci were associated to temperature and productivity in S. ocellatus and to temperature and turbulence in S. tinca suggesting that different drivers may determine genomic diversity and differentiation in each species. Globally, our study highlights that individual-based approach combining genomic, environmental and phenotypic information is key to identify signals of selection and the processes mediating them.
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9
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Francisco SM, Robalo JI. Time matters: genetic composition and evaluation of effective population size in temperate coastal fish species. PeerJ 2020; 8:e9098. [PMID: 32391212 PMCID: PMC7197400 DOI: 10.7717/peerj.9098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 04/09/2020] [Indexed: 12/16/2022] Open
Abstract
Background Extensive knowledge on the genetic characterization of marine organisms has been assembled, mainly concerning the spatial distribution and structuring of populations. Temporal monitoring assesses not only the stability in genetic composition but also its trajectory over time, providing critical information for the accurate forecast of changes in genetic diversity of marine populations, particularly important for both fisheries and endangered species management. We assessed fluctuations in genetic composition among different sampling periods in the western Portuguese shore in three fish species. Methods White seabream Diplodus sargus, sand smelt Atherina presbyter and shanny Lipophrys pholis were chosen, because of their genetic patterns in distinct ecological environments, insight into historical and contemporary factors influencing population effective size (Ne), and degree of commercial exploitation. Samples were obtained near Lisbon between 2003 and 2014 and screened for genetic variation with mitochondrial and nuclear markers. Analyses included genealogies, genetic diversities, temporal structures and contemporary Ne. Results For mtDNA no temporal structure was detected, while for nDNA significant differences were recorded between some sampling periods for the shanny and the sand smelt. Haplotype networks revealed deep genealogies, with various levels of diversification. The shanny revealed a smaller Ne/generation when compared to the other species, which, in turn, revealed no evidence of genetic drift for most study periods. These results highlight the fact that temporal variations in genetic pool composition should be considered when evaluating the population structure of fish species with long distance dispersal, which are more vulnerable to recruitment fluctuations.
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Affiliation(s)
- Sara M Francisco
- MARE-Marine and Environmental Sciences Centre, ISPA-Instituto Universitário, Lisbon, Portugal
| | - Joana I Robalo
- MARE-Marine and Environmental Sciences Centre, ISPA-Instituto Universitário, Lisbon, Portugal
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Carreras C, García‐Cisneros A, Wangensteen OS, Ordóñez V, Palacín C, Pascual M, Turon X. East is East and West is West: Population genomics and hierarchical analyses reveal genetic structure and adaptation footprints in the keystone species
Paracentrotus lividus
(Echinoidea). DIVERS DISTRIB 2019. [DOI: 10.1111/ddi.13016] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Carlos Carreras
- Department de Genètica Microbiologia i Estadística and IRBio Universitat de Barcelona Barcelona Spain
| | - Alex García‐Cisneros
- Centre d'Estudis Avançats de Blanes (CEAB, CSIC) Girona Spain
- Department of Evolutionary Biology, Ecology and Environmental Sciences and IRBIo University of Barcelona Barcelona Spain
| | - Owen S. Wangensteen
- Norwegian College of Fishery Science UiT The Arctic University of Norway Tromsø Norway
| | - Víctor Ordóñez
- Department de Genètica Microbiologia i Estadística and IRBio Universitat de Barcelona Barcelona Spain
| | - Creu Palacín
- Department of Evolutionary Biology, Ecology and Environmental Sciences and IRBIo University of Barcelona Barcelona Spain
| | - Marta Pascual
- Department de Genètica Microbiologia i Estadística and IRBio Universitat de Barcelona Barcelona Spain
| | - Xavier Turon
- Centre d'Estudis Avançats de Blanes (CEAB, CSIC) Girona Spain
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White T, van der Ende J, Nichols TE. Beyond Bonferroni revisited: concerns over inflated false positive research findings in the fields of conservation genetics, biology, and medicine. CONSERV GENET 2019. [DOI: 10.1007/s10592-019-01178-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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