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Byerly PA, Chesser RT, Fleischer RC, McInerney N, Przelomska NAS, Leberg PL. Museum Genomics Provide Evidence for Persistent Genetic Differentiation in a Threatened Seabird Species in the Western Atlantic. Integr Comp Biol 2022; 62:1838-1848. [PMID: 35781565 DOI: 10.1093/icb/icac107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/18/2022] [Accepted: 06/27/2022] [Indexed: 01/05/2023] Open
Abstract
Connectivity among wildlife populations facilitates exchange of genetic material between groups. Changes to historical connectivity patterns resulting from anthropogenic activities can therefore have negative consequences for genetic diversity, particularly for small or isolated populations. DNA obtained from museum specimens can enable direct comparison of temporal changes in connectivity among populations, which can aid in conservation planning and contribute to the understanding of population declines. However, museum DNA can be degraded and only available in low quantities, rendering it challenging for use in population genomic analyses. Applications of genomic methodologies such as targeted sequencing address this issue by enabling capture of shared variable sites, increasing quantity and quality of recovered genomic information. We used targeted sequencing of ultra-conserved Elements (UCEs) to evaluate potential changes in connectivity and genetic diversity of roseate terns (Sterna dougallii) with a breeding distribution in the northwestern Atlantic and the Caribbean. Both populations experienced range contractions and population declines due to anthropogenic activity in the 20th century, which has the potential to alter historical connectivity regimes. Instead, we found that the two populations were differentiated historically as well as contemporaneously, with little evidence of migration between them for either time period. We also found no evidence for temporal changes in genetic diversity, although these interpretations may have been limited due to sequencing artifacts caused by the degraded nature of the museum samples. Population structuring in migratory seabirds is typically reflective of low rates of divergence and high connectivity among geographically segregated subpopulations. Our contrasting results suggest the potential presence of ecological mechanisms driving population differentiation, and highlight the value of targeted sequencing on DNA derived from museum specimens to uncover long-term patterns of genetic differentiation in wildlife populations.
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Affiliation(s)
- Paige A Byerly
- University of Louisiana at Lafayette, 104 E University Ave, Lafayette, LA 70504, USA.,Smithsonian's National Zoo and Conservation Biology Institute, 3001 Connecticut Avenue, NW, Washington, DC 20008, USA
| | - R Terry Chesser
- Eastern Ecological Science Center, U.S. Geological Survey, 12100 Beech Forest Road, Laurel, MD 20708, USA.,National Museum of Natural History, 10th St. and Constitution Avenue, NW, Washington, DC 20560, USA
| | - Robert C Fleischer
- Smithsonian's National Zoo and Conservation Biology Institute, 3001 Connecticut Avenue, NW, Washington, DC 20008, USA
| | - Nancy McInerney
- Smithsonian's National Zoo and Conservation Biology Institute, 3001 Connecticut Avenue, NW, Washington, DC 20008, USA
| | - Natalia A S Przelomska
- National Museum of Natural History, 10th St. and Constitution Avenue, NW, Washington, DC 20560, USA.,Smithsonian's National Zoo and Conservation Biology Institute, 3001 Connecticut Avenue, NW, Washington, DC 20008, USA.,Royal Botanic Gardens, Kew, Richmond TW9 3AE, UK
| | - Paul L Leberg
- University of Louisiana at Lafayette, 104 E University Ave, Lafayette, LA 70504, USA
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2
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Franklin KA, Norris K, Gill JA, Ratcliffe N, Bonnet-Lebrun AS, Butler SJ, Cole NC, Jones CG, Lisovski S, Ruhomaun K, Tatayah V, Nicoll MAC. Individual consistency in migration strategies of a tropical seabird, the Round Island petrel. MOVEMENT ECOLOGY 2022; 10:13. [PMID: 35287747 PMCID: PMC8919588 DOI: 10.1186/s40462-022-00311-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND In migratory species, the extent of within- and between-individual variation in migratory strategies can influence potential rates and directions of responses to environmental changes. Quantifying this variation requires tracking of many individuals on repeated migratory journeys. At temperate and higher latitudes, low levels of within-individual variation in migratory behaviours are common and may reflect repeated use of predictable resources in these seasonally-structured environments. However, variation in migratory behaviours in the tropics, where seasonal predictability of food resources can be weaker, remains largely unknown. METHODS Round Island petrels (Pterodroma sp.) are tropical, pelagic seabirds that breed all year round and perform long-distance migrations. Using multi-year geolocator tracking data from 62 individuals between 2009 and 2018, we quantify levels of within- and between-individual variation in non-breeding distributions and timings. RESULTS We found striking levels of between-individual variation in at-sea movements and timings, with non-breeding migrations to different areas occurring across much of the Indian Ocean and throughout the whole year. Despite this, repeat-tracking of individual petrels revealed remarkably high levels of spatial and temporal consistency in within-individual migratory behaviour, particularly for petrels that departed at similar times in different years and for those departing in the austral summer. However, while the same areas were used by individuals in different years, they were not necessarily used at the same times during the non-breeding period. CONCLUSIONS Even in tropical systems with huge ranges of migratory routes and timings, our results suggest benefits of consistency in individual migratory behaviours. Identifying the factors that drive and maintain between-individual variation in migratory behaviour, and the consequences for breeding success and survival, will be key to understanding the consequences of environmental change across migratory ranges.
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Affiliation(s)
- Kirsty A Franklin
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, UK.
- Institute of Zoology, Zoological Society of London, Regent's Park, London, UK.
| | - Ken Norris
- Natural History Museum, Cromwell Road, London, UK
| | - Jennifer A Gill
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Norman Ratcliffe
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK
| | | | - Simon J Butler
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Nik C Cole
- Durrell Wildlife Conservation Trust, Les Augrès Manor, Trinity, Jersey, UK
- Mauritian Wildlife Foundation, Grannum Road, Vacoas, Mauritius
| | - Carl G Jones
- Durrell Wildlife Conservation Trust, Les Augrès Manor, Trinity, Jersey, UK
- Mauritian Wildlife Foundation, Grannum Road, Vacoas, Mauritius
| | - Simeon Lisovski
- Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Potsdam, Germany
| | - Kevin Ruhomaun
- National Parks and Conservation Service (Government of Mauritius), Reduit, Mauritius
| | - Vikash Tatayah
- Mauritian Wildlife Foundation, Grannum Road, Vacoas, Mauritius
| | - Malcolm A C Nicoll
- Institute of Zoology, Zoological Society of London, Regent's Park, London, UK
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3
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Torres L, Pante E, González‐Solís J, Viricel A, Ribout C, Zino F, MacKin W, Precheur C, Tourmetz J, Calabrese L, Militão T, Zango L, Shirihai H, Bretagnolle V. Sea surface temperature, rather than land mass or geographic distance, may drive genetic differentiation in a species complex of highly dispersive seabirds. Ecol Evol 2021; 11:14960-14976. [PMID: 34765153 PMCID: PMC8571584 DOI: 10.1002/ece3.8180] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 06/27/2021] [Accepted: 07/19/2021] [Indexed: 11/09/2022] Open
Abstract
Seabirds, particularly Procellariiformes, are highly mobile organisms with a great capacity for long dispersal, though simultaneously showing high philopatry, two conflicting life-history traits that may lead to contrasted patterns of genetic population structure. Landmasses were suggested to explain differentiation patterns observed in seabirds, but philopatry, isolation by distance, segregation between breeding and nonbreeding zones, and oceanographic conditions (sea surface temperatures) may also contribute to differentiation patterns. To our knowledge, no study has simultaneously contrasted the multiple factors contributing to the diversification of seabird species, especially in the gray zone of speciation. We conducted a multilocus phylogeographic study on a widespread seabird species complex, the little shearwater complex, showing highly homogeneous morphology, which led to considerable taxonomic debate. We sequenced three mitochondrial and six nuclear markers on all extant populations from the Atlantic (lherminieri) and Indian Oceans (bailloni), that is, five nominal lineages from 13 populations, along with one population from the eastern Pacific Ocean (representing the dichrous lineage). We found sharp differentiation among populations separated by the African continent with both mitochondrial and nuclear markers, while only mitochondrial markers allowed characterizing the five nominal lineages. No differentiation could be detected within these five lineages, questioning the strong level of philopatry showed by these shearwaters. Finally, we propose that Atlantic populations likely originated from the Indian Ocean. Within the Atlantic, a stepping-stone process accounts for the current distribution. Based on our divergence time estimates, we suggest that the observed pattern of differentiation mostly resulted from historical and current variation in sea surface temperatures.
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Affiliation(s)
- Lucas Torres
- Centre d'Etudes Biologiques de ChizéUMR 7372CNRS ‐ La Rochelle UniversitéBeauvoir sur NiortFrance
- Laboratoire LIENSsUMR 7266CNRS ‐ La Rochelle UniversitéLa RochelleFrance
| | - Eric Pante
- Laboratoire LIENSsUMR 7266CNRS ‐ La Rochelle UniversitéLa RochelleFrance
| | - Jacob González‐Solís
- Department de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA)Institut de Recerca de la Biodiversitat (IRBio)Universitat de BarcelonaBarcelonaSpain
| | - Amélia Viricel
- Laboratoire LIENSsUMR 7266CNRS ‐ La Rochelle UniversitéLa RochelleFrance
| | - Cécile Ribout
- Centre d'Etudes Biologiques de ChizéUMR 7372CNRS ‐ La Rochelle UniversitéBeauvoir sur NiortFrance
| | | | - Will MacKin
- 3913 Sterling Ridge LnDurhamNorth CarolinaUSA
| | | | - Julie Tourmetz
- Société d'Etudes Ornithologiques de La RéunionSaint AndréFrance
| | - Licia Calabrese
- Island Conservation SocietyMahéSeychelles
- Faculty of Business & Sustainable DevelopmentIsland Biodiversity & Conservation CenterUniversity of SeychellesMahéSeychelles
| | - Teresa Militão
- Department de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA)Institut de Recerca de la Biodiversitat (IRBio)Universitat de BarcelonaBarcelonaSpain
| | - Laura Zango
- Department de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA)Institut de Recerca de la Biodiversitat (IRBio)Universitat de BarcelonaBarcelonaSpain
| | | | - Vincent Bretagnolle
- Centre d'Etudes Biologiques de ChizéUMR 7372CNRS ‐ La Rochelle UniversitéBeauvoir sur NiortFrance
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4
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Ferrer Obiol J, James HF, Chesser RT, Bretagnolle V, González-Solís J, Rozas J, Riutort M, Welch AJ. Integrating Sequence Capture and Restriction Site-Associated DNA Sequencing to Resolve Recent Radiations of Pelagic Seabirds. Syst Biol 2021; 70:976-996. [PMID: 33512506 PMCID: PMC8357341 DOI: 10.1093/sysbio/syaa101] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 11/13/2020] [Accepted: 12/15/2020] [Indexed: 01/01/2023] Open
Abstract
The diversification of modern birds has been shaped by a number of radiations. Rapid diversification events make reconstructing the evolutionary relationships among taxa challenging due to the convoluted effects of incomplete lineage sorting (ILS) and introgression. Phylogenomic data sets have the potential to detect patterns of phylogenetic incongruence, and to address their causes. However, the footprints of ILS and introgression on sequence data can vary between different phylogenomic markers at different phylogenetic scales depending on factors such as their evolutionary rates or their selection pressures. We show that combining phylogenomic markers that evolve at different rates, such as paired-end double-digest restriction site-associated DNA (PE-ddRAD) and ultraconserved elements (UCEs), allows a comprehensive exploration of the causes of phylogenetic discordance associated with short internodes at different timescales. We used thousands of UCE and PE-ddRAD markers to produce the first well-resolved phylogeny of shearwaters, a group of medium-sized pelagic seabirds that are among the most phylogenetically controversial and endangered bird groups. We found that phylogenomic conflict was mainly derived from high levels of ILS due to rapid speciation events. We also documented a case of introgression, despite the high philopatry of shearwaters to their breeding sites, which typically limits gene flow. We integrated state-of-the-art concatenated and coalescent-based approaches to expand on previous comparisons of UCE and RAD-Seq data sets for phylogenetics, divergence time estimation, and inference of introgression, and we propose a strategy to optimize RAD-Seq data for phylogenetic analyses. Our results highlight the usefulness of combining phylogenomic markers evolving at different rates to understand the causes of phylogenetic discordance at different timescales. [Aves; incomplete lineage sorting; introgression; PE-ddRAD-Seq; phylogenomics; radiations; shearwaters; UCEs.].
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Affiliation(s)
- Joan Ferrer Obiol
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Barcelona, Catalonia, Spain
| | - Helen F James
- Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
| | - R Terry Chesser
- Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
- U.S. Geological Survey, Patuxent Wildlife Research Center, Laurel, MD, USA
| | - Vincent Bretagnolle
- Centre d’Études Biologiques de Chizé, CNRS & La Rochelle Université, 79360, Villiers en Bois, France
| | - Jacob González-Solís
- Institut de Recerca de la Biodiversitat (IRBio), Barcelona, Catalonia, Spain
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Julio Rozas
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Barcelona, Catalonia, Spain
| | - Marta Riutort
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Barcelona, Catalonia, Spain
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5
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Humeau L, Le Corre M, Reynolds SJ, Wearn C, Hennicke JC, Russell JC, Gomard Y, Magalon H, Pinet P, Gélin P, Couzi F, Bemanaja E, Tatayah V, Ousseni B, Rocamora G, Talbot P, Shah N, Bugoni L, Da Silva D, Jaeger A. Genetic structuring among colonies of a pantropical seabird: Implication for subspecies validation and conservation. Ecol Evol 2020; 10:11886-11905. [PMID: 33209258 PMCID: PMC7663974 DOI: 10.1002/ece3.6635] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 01/17/2023] Open
Abstract
Investigations of the genetic structure of populations over the entire range of a species yield valuable information about connectivity among populations. Seabirds are an intriguing taxon in this regard because they move extensively when not breeding, facilitating intermixing of populations, but breed consistently on the same isolated islands, restricting gene flow among populations. The degree of genetic structuring of populations varies extensively among seabird species but they have been understudied in their tropical ranges. Here, we address this across a broad spatial scale by using microsatellite and mitochondrial data to explore the population connectivity of 13 breeding populations representing the six subspecies of the white-tailed tropicbird (Phaethon lepturus) in the Atlantic, Indian, and Pacific Oceans. Our primary aim was to identify appropriate conservation units for this little known species. Three morphometric characters were also examined in the subspecies. We found a clear pattern of population structuring with four genetic groups. The most ancient and the most isolated group was in the northwestern Atlantic Ocean. The South Atlantic populations and South Mozambique Channel population on Europa were genetically isolated and may have had a common ancestor. Birds from the Indo-Pacific region showed unclear and weak genetic differentiation. This structuring was most well defined from nuclear and mtDNA markers but was less well resolved by morphological data. The validity of classifying white-tailed tropicbirds into six distinct subspecies is discussed in light of our new findings. From a conservation standpoint our results highlight that the three most threatened conservation units for this species are the two subspecies of the tropical North and South Atlantic Oceans and that of Europa Island in the Indian Ocean.
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Affiliation(s)
- Laurence Humeau
- UMR PVBMTUniversité de La RéunionCIRADSaint‐Denis Cedex 9La RéunionFrance
| | - Matthieu Le Corre
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
| | - Silas James Reynolds
- Centre for OrnithologySchool of BiosciencesCollege of Life & Environmental SciencesUniversity of BirminghamBirminghamUK
- Army Ornithological Society (AOS)c/o Prince Consort LibraryAldershotHampshireUK
| | - Colin Wearn
- Royal Air Force Ornithological Society (RAFOS)Royal Air Force HeadquartersBuckinghamshireUK
| | - Janos C. Hennicke
- Department of Ecology and ConservationBiocentre GrindelUniversity of HamburgHamburgGermany
- Centre d'Etudes Biologiques de ChizéCEBC‐CNRSVilliers‐en‐BoisFrance
| | - James C. Russell
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
- School of Biological Sciences and Department of StatisticsUniversity of AucklandAucklandNew Zealand
| | - Yann Gomard
- UMR PIMITCNRSINSERMIRDUniversité de La RéunionPlateforme Technologique CYROISainte‐ClotildeLa RéunionFrance
| | - Hélène Magalon
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
| | - Patrick Pinet
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
- Parc National de La RéunionLa Plaine des PalmistesLa RéunionFrance
| | - Pauline Gélin
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
| | | | - Etienne Bemanaja
- Centre National de Recherches Océanographiques (CNRO)Nosy BeMadagascar
| | | | | | - Gérard Rocamora
- Island Conservation SocietyMahéSeychelles
- Island Biodiversity and Conservation centreUniversity of SeychellesMahéSeychelles
| | | | - Nirmal Shah
- Nature SeychellesThe Center for Environment and EducationMahéSeychelles
| | - Leandro Bugoni
- Instituto de Ciências BiológicasUniversidade Federal do Rio Grande (FURG)Rio GrandeBrazil
| | - Denis Da Silva
- UMR PVBMTUniversité de La RéunionCIRADSaint‐Denis Cedex 9La RéunionFrance
| | - Audrey Jaeger
- UMR ENTROPIEUniversité de La RéunionIRDCNRSSaint‐Denis Cedex 9La RéunionFrance
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6
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Ye Z, Chen D, Yuan J, Zheng C, Yang X, Wang W, Zhang Y, Wang S, Jiang K, Bu W. Are population isolations and declines a threat to island endemic water striders? A lesson from demographic and niche modelling of Metrocoris esakii (Hemiptera: Gerridae). Mol Ecol 2020; 29:4573-4587. [PMID: 33006793 DOI: 10.1111/mec.15669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 09/10/2020] [Accepted: 09/21/2020] [Indexed: 12/14/2022]
Abstract
Genetic stochasticity and bottlenecking in the course of Pleistocene glaciations have been identified as threatening the survival of local endemics. However, the mechanisms by which local endemic species balance the influences of these two events remain poorly understood. Here, we generated a double-digest restriction site-associated DNA sequencing (ddRAD-seq) data set, mined mitochondrial sequences and constructed ecological niche models for the island endemic water strider Metrocoris esakii (Hemiptera: Gerridae). We found that M. esakii comprised three divergent lineages (i.e., north, central and south) isolated by geographical barriers and generally experienced population declines with the constriction of suitable areas during the Last Glacial Maximum (LGM). Further demographic model testing and stairway plots revealed a history of recent gene flow among the neighbouring lineages and rapid recovery at the end of the LGM, indicating that M. esakii at least had the potential for an adaptive response to population fragmentation and bottlenecking. The northern lineage did not show genetic bottlenecking during the LGM, which was probably due to its large effective population size (Ne ) from migration, which improved its adaptive potential. Relative to the ddRAD-seq data set, the demographic results based on mitochondrial sequences were less conclusive, showing weak differentiation and oversimplified demographic trajectories for the three genetic lineages. Overall, this study provides some degree of optimism for the survival of island endemic water striders from a demographic perspective, but further evaluation of their extinction risk under the impacts of human activities is required.
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Affiliation(s)
- Zhen Ye
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Danyang Chen
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Juanjuan Yuan
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Chenguang Zheng
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Xin Yang
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Wenwu Wang
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Yaoyao Zhang
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Siqi Wang
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Kun Jiang
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
| | - Wenjun Bu
- Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, China
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7
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Wang Y, Xie J, Wu E, Yahuza L, Duan G, Shen L, Liu H, Zhou S, Nkurikiyimfura O, Andersson B, Yang L, Shang L, Zhu W, Zhan J. Lack of gene flow between Phytophthora infestans populations of two neighboring countries with the largest potato production. Evol Appl 2020; 13:318-329. [PMID: 31993079 PMCID: PMC6976962 DOI: 10.1111/eva.12870] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/23/2019] [Accepted: 08/29/2019] [Indexed: 12/18/2022] Open
Abstract
Gene flow is an important evolutionary force that enables adaptive responses of plant pathogens in response to changes in the environment and plant disease management strategies. In this study, we made a direct inference concerning gene flow in the Irish famine pathogen Phytophthora infestans between two of its hosts (potato and tomato) as well as between China and India. This was done by comparing sequence characteristics of the eukaryotic translation elongation factor 1 alpha (eEF-1α) gene, generated from 245 P. infestans isolates sampled from two countries and hosts. Consistent with previous results, we found that eEF-1α gene was highly conserved and point mutation was the only mechanism generating any sequence variation. Higher genetic variation was found in the eEF-1α sequences in the P. infestans populations sampled from tomato compared to those sampled from potato. We also found the P. infestans population from India displayed a higher genetic variation in the eEF-1α sequences compared to China. No gene flow was detected between the pathogen populations from the two countries, which is possibly attributed to the geographic barrier caused by Himalaya Plateau and the minimum cross-border trade of potato and tomato products. The implications of these results for a sustainable management of late blight diseases are discussed.
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Affiliation(s)
- Yan‐Ping Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Jia‐Hui Xie
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - E‐Jiao Wu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Lurwanu Yahuza
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Guo‐Hua Duan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Lin‐Lin Shen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Hao Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Shi‐Hao Zhou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Oswald Nkurikiyimfura
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Björn Andersson
- Department of Forest Mycology and Plant PathologySwedish University of Agricultural SciencesUppsalaSweden
| | - Li‐Na Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Li‐Ping Shang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Wen Zhu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Key Laboratory of Plant VirologyInstitute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhouChina
| | - Jiasui Zhan
- Key Lab for Biopesticide and Chemical BiologyMinistry of EducationFujian Agriculture and Forestry UniversityFuzhouChina
- Department of Forest Mycology and Plant PathologySwedish University of Agricultural SciencesUppsalaSweden
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8
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Foote AD, Martin MD, Louis M, Pacheco G, Robertson KM, Sinding MHS, Amaral AR, Baird RW, Baker CS, Ballance L, Barlow J, Brownlow A, Collins T, Constantine R, Dabin W, Dalla Rosa L, Davison NJ, Durban JW, Esteban R, Ferguson SH, Gerrodette T, Guinet C, Hanson MB, Hoggard W, Matthews CJD, Samarra FIP, de Stephanis R, Tavares SB, Tixier P, Totterdell JA, Wade P, Excoffier L, Gilbert MTP, Wolf JBW, Morin PA. Killer whale genomes reveal a complex history of recurrent admixture and vicariance. Mol Ecol 2019; 28:3427-3444. [PMID: 31131963 DOI: 10.1111/mec.15099] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/06/2019] [Accepted: 04/08/2019] [Indexed: 02/06/2023]
Abstract
Reconstruction of the demographic and evolutionary history of populations assuming a consensus tree-like relationship can mask more complex scenarios, which are prevalent in nature. An emerging genomic toolset, which has been most comprehensively harnessed in the reconstruction of human evolutionary history, enables molecular ecologists to elucidate complex population histories. Killer whales have limited extrinsic barriers to dispersal and have radiated globally, and are therefore a good candidate model for the application of such tools. Here, we analyse a global data set of killer whale genomes in a rare attempt to elucidate global population structure in a nonhuman species. We identify a pattern of genetic homogenisation at lower latitudes and the greatest differentiation at high latitudes, even between currently sympatric lineages. The processes underlying the major axis of structure include high drift at the edge of species' range, likely associated with founder effects and allelic surfing during postglacial range expansion. Divergence between Antarctic and non-Antarctic lineages is further driven by ancestry segments with up to four-fold older coalescence time than the genome-wide average; relicts of a previous vicariance during an earlier glacial cycle. Our study further underpins that episodic gene flow is ubiquitous in natural populations, and can occur across great distances and after substantial periods of isolation between populations. Thus, understanding the evolutionary history of a species requires comprehensive geographic sampling and genome-wide data to sample the variation in ancestry within individuals.
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Affiliation(s)
- Andrew D Foote
- CMPG, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | | | - Marie Louis
- Department of Biology, Section for Evolutionary Genomics, University of Copenhagen, Copenhagen, Denmark.,Scottish Oceans Institute, East Sands, University of St. Andrews, St. Andrews, UK
| | - George Pacheco
- Department of Biology, Section for Evolutionary Genomics, University of Copenhagen, Copenhagen, Denmark
| | - Kelly M Robertson
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
| | - Mikkel-Holger S Sinding
- Department of Biology, Section for Evolutionary Genomics, University of Copenhagen, Copenhagen, Denmark.,Greenland Institute of Natural Resources, Nuuk, Greenland
| | - Ana R Amaral
- American Museum of Natural History, New York City, New York.,Faculdade de Ciências Universidade de Lisboa, Centre for Ecology, Evolution and Environmental Changes, Lisboa, Portugal
| | | | - Charles Scott Baker
- Department of Fisheries and Wildlife, Marine Mammal Institute, Oregon State University, Newport, Oregon.,School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Lisa Ballance
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
| | - Jay Barlow
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
| | - Andrew Brownlow
- Scottish Marine Animal Stranding Scheme, SRUC Veterinary Services Drummondhill, Inverness, UK
| | - Tim Collins
- Ocean Giants Program, Wildlife Conservation Society, New York City, New York
| | | | - Willy Dabin
- Observatoire Pelagis, Université de La Rochelle-CNRS, La Rochelle, France
| | - Luciano Dalla Rosa
- Laboratório de Ecologia e Conservação da Megafauna Marinha, Instituto de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Nicholas J Davison
- Scottish Marine Animal Stranding Scheme, SRUC Veterinary Services Drummondhill, Inverness, UK
| | - John W Durban
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
| | - Ruth Esteban
- CIRCE, Conservation, Information and Research on Cetaceans, Algeciras, Spain
| | | | - Tim Gerrodette
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
| | - Christophe Guinet
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS-ULR, UMR, Chizé, France
| | - M Bradley Hanson
- National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Northwest Fisheries Science Center, Seattle, Washington
| | - Wayne Hoggard
- National Marine Fisheries Service, NOAA, Southeast Fisheries Science Center, Pascagoula, Mississippi
| | | | | | - Renaud de Stephanis
- CIRCE, Conservation, Information and Research on Cetaceans, Algeciras, Spain
| | - Sara B Tavares
- Scottish Oceans Institute, East Sands, University of St. Andrews, St. Andrews, UK
| | - Paul Tixier
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS-ULR, UMR, Chizé, France.,School of Life and Environmental Sciences (Burwood Campus), Deakin University, Geelong, Victoria, Australia
| | - John A Totterdell
- Marine Information and Research Group-Australia (MIRG), Quinns Rocks, Western Australia, Australia
| | - Paul Wade
- National Marine Mammal Laboratory, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Alaska Fisheries Science Center, Seattle, Washington
| | - Laurent Excoffier
- CMPG, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | - M Thomas P Gilbert
- NTNU University Museum, Trondheim, Norway.,Department of Biology, Section for Evolutionary Genomics, University of Copenhagen, Copenhagen, Denmark
| | - Jochen B W Wolf
- Division of Evolutionary Biology, Faculty of Biology, LMU Munich, Planegg-Martinsried, Germany.,Department of Evolutionary Biology, Science of Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Phillip A Morin
- Marine Mammal and Turtle Division, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, Southwest Fisheries Science Center, La Jolla, California
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