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Patel JS, Chouvenc T, Wu CC, Li HF, Su NY. Soldier phenotypic differences among 2 invasive and destructive Coptotermes species and their hybrids (Blattodea: Isoptera: Rhinotermitidae). JOURNAL OF INSECT SCIENCE (ONLINE) 2023; 23:2. [PMID: 37952215 PMCID: PMC10640870 DOI: 10.1093/jisesa/iead095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 08/16/2023] [Accepted: 10/26/2023] [Indexed: 11/14/2023]
Abstract
With recent evidence of hybridization events in the field, the phenotypic traits of F1 hybrid colonies of 2 destructive subterranean termite species, Coptotermes formosanus Shiraki and Coptotermes gestroi (Wasmann) remain to be investigated. In this study, laboratory colonies of 2 conspecific pairings and 2 heterospecific pairings (hybrid F = ♀C. formosanus × ♂C. gestroi, hybrid G = ♀C. gestroi × ♂C. formosanus) were examined in Florida, USA, and in Taiwan. Colony nest architecture for both hybrids displayed disorganized carton materials compared to the defined trabecular carton of both parental species. Soldier head measurements were not a reliable approach for diagnostic purposes, as soldier morphometric traits widely overlapped across all mating combinations, except for hybrid F soldiers displaying abnormally long mandibles. Hybrid F soldiers' mandibles also remained parallel when at rest. However, 4 qualitative morphological differences in soldiers were determined for diagnostic purposes. First, the fontanelle in both hybrids is horizontally ellipsoid whereas subcircular in C. gestroi and trianguliform in C. formosanus. Second, sclerotized striations along the postmental sulcus are present in C. gestroi, absent in C. formosanus, and intermediate in both hybrid soldier types. Third, each lateral margin of the fontanelle is flanked by 2 setae in C. formosanus and both hybrids, while a single seta resides on each side of the fontanelle in C. gestroi. Finally, C. gestroi and hybrid soldiers' heads are characterized by a bulging vertex that is lacking in C. formosanus. Therefore, a combination of these 4 characteristics now allows for soldier identification of hybrid Coptotermes.
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Affiliation(s)
- Jayshree S Patel
- Department of Entomology and Nematology, Ft. Lauderdale Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Ft. Lauderdale, FL, USA
- Oncospark Inc., Jacksonville, FL, USA
| | - Thomas Chouvenc
- Department of Entomology and Nematology, Ft. Lauderdale Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Ft. Lauderdale, FL, USA
| | - Chia-Chien Wu
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
| | - Hou-Feng Li
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
| | - Nan-Yao Su
- Department of Entomology and Nematology, Ft. Lauderdale Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Ft. Lauderdale, FL, USA
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2
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Comerford MS, La TM, Carroll S, Egan SP. Spatial sorting promotes rapid (mal)adaptation in the red-shouldered soapberry bug after hurricane-driven local extinctions. Nat Ecol Evol 2023; 7:1856-1868. [PMID: 37813943 DOI: 10.1038/s41559-023-02205-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 08/24/2023] [Indexed: 10/11/2023]
Abstract
Predicting future evolutionary change is a critical challenge in the Anthropocene as geographic range shifts and local extinction emerge as hallmarks of planetary change. Hence, spatial sorting-a driver of rapid evolution in which dispersal-associated traits accumulate along expanding range edges and within recolonized habitats-might be of growing importance in ecology and conservation. We report on the results of a natural experiment that monitored recolonization of host plants by the seed-feeding, red-shouldered soapberry bug, Jadera haematoloma, after local extinctions from catastrophic flooding in an extreme hurricane. We tested the contribution of spatial sorting to generate rapid and persistent evolution in dispersal traits, as well as in feeding traits unrelated to dispersal. Long-winged dispersal forms accumulated in recolonized habitats and due to genetic correlation, mouthparts also became longer and this shift persisted across generations. Those longer mouthparts were probably adaptive on one host plant species but maladaptive on two others based on matching the optimum depth of seeds within their host fruits. Moreover, spatial sorting eroded recently evolved adaptive divergence in mouthpart length among all host-associated biotypes, an outcome pointing to profound practical consequences of the extreme weather event for local adaptation, population resilience and evolutionary futures.
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Affiliation(s)
| | - Tatum M La
- Department of BioSciences, Rice University, Houston, TX, USA
- Clements High School, Sugar Land, TX, USA
| | - Scott Carroll
- Department of Entomology & Nematology, University of California, Davis, CA, USA
| | - Scott P Egan
- Department of BioSciences, Rice University, Houston, TX, USA
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3
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Bisconti R, Carere C, Costantini D, Liparoto A, Chiocchio A, Canestrelli D. Evolution of personality and locomotory performance traits during a late Pleistocene island colonization in a tree frog. Curr Zool 2023; 69:631-641. [PMID: 37637312 PMCID: PMC10449429 DOI: 10.1093/cz/zoac062] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/02/2022] [Indexed: 08/29/2023] Open
Abstract
Recent empirical and theoretical studies suggest that personality and locomotory performance traits linked to dispersal abilities are crucial components of the dispersal syndromes, and that they can evolve during range expansions and colonization processes. Island colonization is one of the best characterized processes in dispersal biogeography, and its implication in the evolution of phenotypic traits has been investigated over a wide range of temporal scales. However, the effect of island colonization on personality and performance traits of natural populations, and how these traits could drive island colonization, has been little explored. Noteworthy, no studies have addressed these processes in the context of late Pleistocene range expansions. Here, we investigated the contribution of island colonization triggered by postglacial range expansions to intraspecific variation in personality and locomotory performance traits. We compared boldness, exploration, jumping performance, and stickiness abilities in populations from 3 equidistant areas of the Tyrrhenian tree frog Hyla sarda, 2 from the main island (Corsica Island), and 1 from the recently colonized island of Elba. Individuals from Elba were significantly bolder than individuals from Corsica, as they emerged sooner from a shelter (P = 0.028), while individuals from Corsica showed markedly higher jumping and stickiness performance (both P < 0.001), resulting as more performing than those of Elba. We discuss these results in the context of the major microevolutionary processes at play during range expansion, including selection, spatial sorting, founder effects, and their possible interaction with local adaptation processes.
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Affiliation(s)
- Roberta Bisconti
- Department of Ecological and Biological Science, Tuscia University, Largo dell’Università s.n.c., 01100 Viterbo, Italy
| | - Claudio Carere
- Department of Ecological and Biological Science, Tuscia University, Largo dell’Università s.n.c., 01100 Viterbo, Italy
| | - David Costantini
- Unité Physiologie Moléculaire et Adaptation (PhyMA), Muséum National d’Histoire Naturelle, CNRS, CP32, 57 rue Cuvier 75005 Paris, France
| | - Anita Liparoto
- Department of Ecological and Biological Science, Tuscia University, Largo dell’Università s.n.c., 01100 Viterbo, Italy
| | - Andrea Chiocchio
- Department of Ecological and Biological Science, Tuscia University, Largo dell’Università s.n.c., 01100 Viterbo, Italy
| | - Daniele Canestrelli
- Department of Ecological and Biological Science, Tuscia University, Largo dell’Università s.n.c., 01100 Viterbo, Italy
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Zbinden ZD, Douglas MR, Chafin TK, Douglas ME. A community genomics approach to natural hybridization. Proc Biol Sci 2023; 290:20230768. [PMID: 37192670 PMCID: PMC10188237 DOI: 10.1098/rspb.2023.0768] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 04/26/2023] [Indexed: 05/18/2023] Open
Abstract
Hybridization is a complicated, oft-misunderstood process. Once deemed unnatural and uncommon, hybridization is now recognized as ubiquitous among species. But hybridization rates within and among communities are poorly understood despite the relevance to ecology, evolution and conservation. To clarify, we examined hybridization across 75 freshwater fish communities within the Ozarks of the North American Interior Highlands (USA) by single nucleotide polymorphism (SNP) genotyping 33 species (N = 2865 individuals; double-digest restriction site-associated DNA sequencing (ddRAD)). We found evidence of hybridization (70 putative hybrids; 2.4% of individuals) among 18 species-pairs involving 73% (24/33) of study species, with the majority being concentrated within one family (Leuciscidae/minnows; 15 species; 66 hybrids). Interspecific genetic exchange-or introgression-was evident from 24 backcrossed individuals (10/18 species-pairs). Hybrids occurred within 42 of 75 communities (56%). Four selected environmental variables (species richness, protected area extent, precipitation (May and annually)) exhibited 73-78% accuracy in predicting hybrid occurrence via random forest classification. Our community-level assessment identified hybridization as spatially widespread and environmentally dependent (albeit predominantly within one diverse, omnipresent family). Our approach provides a more holistic survey of natural hybridization by testing a wide range of species-pairs, thus contrasting with more conventional evaluations.
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Affiliation(s)
- Zachery D. Zbinden
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Marlis R. Douglas
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Tyler K. Chafin
- Biomathematics and Statistics Scotland, Edinburgh, Scotland, UK
| | - Michael E. Douglas
- Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA
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5
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Legacies of domestication, Neolithic diffusion and trade between Indian subcontinent and Island Southeast Asia shape maternal genetic diversity of Andaman cattle. PLoS One 2022; 17:e0278681. [PMID: 36490290 PMCID: PMC9733863 DOI: 10.1371/journal.pone.0278681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022] Open
Abstract
Andaman cattle is a precious indigenous livestock species endemic to Andaman and Nicobar Islands, India. Till date, origin and genetic makeup of the breed which is warranted for breed conservation is not known. Moreover, the spread of zebu cattle from Indus valley to different parts of Island Southeast Asia (ISEA) is not properly understood. Here, we report the genetic diversity, population structure of Andaman cattle and their evolution in the context of epicentre of zebu domestication and ISEA. High genetic diversity in complete mitochondrial D-loop sequences indicated the ability of the breed to withstand impending climate change. Total 81 haplotypes were detected and all of them except three belonged to Bos indicus. The presence of taurine haplotypes in Andaman cattle indicate introgression by European-derived cattle. A poor phylogenetic signal of Andaman cattle with genetic affinities with cattle of Indian subcontinent and ISEA was observed. The poor phylogenetic structure may be due to multidirectional gene flow from Indian subcontinent and ISEA, with which Andaman shares a close cultural and trade relationship from Neolithic age. We hypothesize that Andaman cattle is the outcome of Neolithic diffusion from centre of zebu domestication along with multidirectional commercial exchange between Indian subcontinent and ISEA.
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6
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Bourret SL, Kovach RP, Cline TJ, Strait JT, Muhlfeld CC. High dispersal rates in hybrids drive expansion of maladaptive hybridization. Proc Biol Sci 2022; 289:20221813. [PMID: 36350203 PMCID: PMC9653238 DOI: 10.1098/rspb.2022.1813] [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: 09/12/2022] [Accepted: 10/18/2022] [Indexed: 11/11/2023] Open
Abstract
Hybridization between native and invasive species, a major cause of biodiversity loss, can spread rapidly even when hybrids have reduced fitness. This paradox suggests that hybrids have greater dispersal rates than non-hybridized individuals, yet this mechanism has not been empirically tested in animal populations. Here, we test if non-native genetic introgression increases reproductive dispersal using a human-mediated hybrid zone between native cutthroat trout (<i>Oncorhynchus clarkii</i>) and invasive rainbow trout (<i>Oncorhynchus mykiss</i>) in a large and connected river system. We quantified the propensity for individuals to migrate from natal rearing habitats (migrate), reproduce in non-natal habitats (stray), and the joint probability of dispersal as a function of genetic ancestry. Hybrid trout with predominantly non-native rainbow trout ancestry were more likely to migrate as juveniles and to stray as adults. Overall, hybrids with greater than 50% rainbow trout ancestry were 5.7 times more likely to disperse than native or hybrid trout with small amounts of rainbow trout ancestry. Our results show a genetic basis for increased dispersal in hybrids that is likely contributing to the rapid expansion of invasive hybridization between these species. Management actions that decrease the probability of hybrid dispersal may mitigate the harmful effects of invasive hybridization on native biodiversity.
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Affiliation(s)
- Samuel L. Bourret
- Montana Fish, Wildlife & Parks, 490 N. Meridian Rd. Kalispell, MT 59901, USA
| | - Ryan P. Kovach
- Montana Fish, Wildlife & Parks, University of Montana, Fish Conservation Genetics Lab, Missoula, MT 59812, USA
| | - Timothy J. Cline
- U.S. Geological Survey, Northern Rocky Mountain Science Center, 38 Mather Dr., West Glacier, MT 59936, USA
| | - Jeffrey T. Strait
- Idaho Department of Fish and Game, 2885 W. Kathleen Ave., Coeur d'Alene, ID 83815, USA
| | - Clint C. Muhlfeld
- U.S. Geological Survey, Northern Rocky Mountain Science Center, 38 Mather Dr., West Glacier, MT 59936, USA
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7
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Comerford M, Egan SP. The potential role of spatial sorting in speciation and adaptive radiations. POPUL ECOL 2022. [DOI: 10.1002/1438-390x.12108] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Scott P. Egan
- Department of BioSciences Rice University Houston Texas USA
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8
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Integumentary Colour Allocation in the Stork Family (Ciconiidae) Reveals Short-Range Visual Cues for Species Recognition. BIRDS 2021. [DOI: 10.3390/birds2010010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The family Ciconiidae comprises 19 extant species which are highly social when nesting and foraging. All species share similar morphotypes, with long necks, a bill, and legs, and are mostly coloured in the achromatic spectrum (white, black, black, and white, or shades of grey). Storks may have, however, brightly coloured integumentary areas in, for instance, the bill, legs, or the eyes. These chromatic patches are small in surface compared with the whole body. We have analyzed the conservatism degree of colouration in 10 body areas along an all-species stork phylogeny derived from BirdTRee using Geiger models. We obtained low conservatism in frontal areas (head and neck), contrasting with a high conservatism in the rest of the body. The frontal areas tend to concentrate the chromatic spectrum whereas the rear areas, much larger in surface, are basically achromatic. These results lead us to suggest that the divergent evolution of the colouration of frontal areas is related to species recognition through visual cue assessment in the short-range, when storks form mixed-species flocks in foraging or resting areas.
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9
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Bautista C, Marsit S, Landry CR. Interspecific hybrids show a reduced adaptive potential under DNA damaging conditions. Evol Appl 2021; 14:758-769. [PMID: 33767750 PMCID: PMC7980265 DOI: 10.1111/eva.13155] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 10/12/2020] [Indexed: 12/15/2022] Open
Abstract
Hybridization may increase the probability of adaptation to extreme stresses. This advantage could be caused by an increased genome plasticity in hybrids, which could accelerate the search for adaptive mutations. High ultraviolet (UV) radiation is a particular challenge in terms of adaptation because it affects the viability of organisms by directly damaging DNA, while also challenging future generations by increasing mutation rate. Here we test whether hybridization accelerates adaptive evolution in response to DNA damage, using yeast as a model. We exposed 180 populations of hybrids between species (Saccharomyces cerevisiae and Saccharomyces paradoxus) and their parental strains to UV mimetic and control conditions for approximately 100 generations. Although we found that adaptation occurs in both hybrids and parents, hybrids achieved a lower rate of adaptation, contrary to our expectations. Adaptation to DNA damage conditions comes with a large and similar cost for parents and hybrids, suggesting that this cost is not responsible for the lower adaptability of hybrids. We suggest that the lower adaptive potential of hybrids in this condition may result from the interaction between DNA damage and the inherent genetic instability of hybrids.
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Affiliation(s)
- Carla Bautista
- Institut de Biologie Intégrative et des Systèmes (IBIS)Université LavalQuébecQCCanada
- Département de BiologieFaculté des Sciences et de GénieUniversité LavalQuébecQCCanada
- Regroupement québécois de recherche sur la fonction, la structure et l'ingénierie des protéines (PROTEO)Université LavalQuébecQCCanada
- Centre de Recherche en Données Massives (CRDM)Université LavalQuébecQCCanada
| | - Souhir Marsit
- Institut de Biologie Intégrative et des Systèmes (IBIS)Université LavalQuébecQCCanada
- Département de BiologieFaculté des Sciences et de GénieUniversité LavalQuébecQCCanada
- Regroupement québécois de recherche sur la fonction, la structure et l'ingénierie des protéines (PROTEO)Université LavalQuébecQCCanada
- Centre de Recherche en Données Massives (CRDM)Université LavalQuébecQCCanada
| | - Christian R. Landry
- Institut de Biologie Intégrative et des Systèmes (IBIS)Université LavalQuébecQCCanada
- Département de BiologieFaculté des Sciences et de GénieUniversité LavalQuébecQCCanada
- Regroupement québécois de recherche sur la fonction, la structure et l'ingénierie des protéines (PROTEO)Université LavalQuébecQCCanada
- Centre de Recherche en Données Massives (CRDM)Université LavalQuébecQCCanada
- Département de Biochimie, de Microbiologie et de Bio‐informatiqueFaculté des Sciences et de GénieUniversité LavalQuébecQCCanada
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10
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De AK, Sawhney S, Bhattacharya D, Sujatha T, Sunder J, Ponraj P, Ravi SK, Mondal S, Malakar D, Kundu A. Origin, genetic diversity and evolution of Andaman local duck, a native duck germplasm of an insular region of India. PLoS One 2021; 16:e0245138. [PMID: 33561119 PMCID: PMC7872295 DOI: 10.1371/journal.pone.0245138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 12/23/2020] [Indexed: 11/29/2022] Open
Abstract
Domestic ducks are of paramount importance as a cheap source of protein in rural India. Andaman local duck (ALD) is an indigenous avian genetic resource of Andaman and Nicobar islands (ANI) and is mainly distributed in Middle and Northern parts of these islands. Negligence has brought this breed on the edge of extinction necessitating immediate conservation efforts. Here, we report the genetic diversity, population structure and matrilineal genetic root of ALD. Partial mtDNA D-loop sequences were analyzed in 71 ALD samples and analysis revealed 19 polymorphic sites and 13 haplotypes. Estimated haplotype (Hd ± SD) and nucleotide diversity (π ± SD) were 0.881 ± 0.017 and 0.00897 ± 0.00078 respectively. The high genetic diversity of ALD indicates introgression of genetic material from other local duck breeds. In addition, it can be postulated that ALD bearing high genetic diversity has strong ability to adapt to environmental changes and can withstand impending climate change. Phylogenetic and network analysis indicate that ALD falls under Eurasian clade of mallard and ALD forms three clusters; one cluster is phylogenetically close to Southeast Asian countries, one close to Southern part of mainland India and the third one forms an independent cluster. Therefore, ALD might have migrated either from Southeast Asian countries which enjoy a close cultural bondage with ANI from time immemorial or from Southern part of India. The independent cluster may have evolved locally in these islands and natural selection pressure imposed by environmental conditions might be the driving force for evaluation of these duck haplotypes; which mimics Darwin’s theory of natural selection. The results of the study will be beneficial for formulating future breeding programme and conservation strategy towards sustainable development of the duck breed.
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Affiliation(s)
- Arun Kumar De
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
- * E-mail:
| | - Sneha Sawhney
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Debasis Bhattacharya
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - T. Sujatha
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Jai Sunder
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Perumal Ponraj
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - S. K. Ravi
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - Samiran Mondal
- Department of Veterinary Pathology, West Bengal University of Animal and Fishery Sciences, Kolkata, West Bengal, India
| | - Dhruba Malakar
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, India
| | - A. Kundu
- Animal Science Division, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
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Quilodrán CS, Tsoupas A, Currat M. The Spatial Signature of Introgression After a Biological Invasion With Hybridization. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.569620] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The accumulation of genome-wide molecular data has emphasized the important role of hybridization in the evolution of many organisms, which may carry introgressed genomic segments resulting from past admixture events with other taxa. Despite a number of examples of hybridization occurring during biological invasions, the resulting spatial patterns of genomic introgression remain poorly understood. Preliminary simulation studies have suggested a heterogeneous spatial level of introgression for invasive taxa after range expansion. We investigated in detail the robustness of this pattern and its persistence over time for both invasive and local organisms. Using spatially explicit simulations, we explored the spatial distribution of introgression across the area of colonization of an invasive taxon hybridizing with a local taxon. The general pattern for neutral loci supported by our results is an increasing introgression of local genes into the invasive taxon with the increase in the distance from the source of the invasion and a decreasing introgression of invasive genes into the local taxon. However, we also show there is some variation in this general trend depending on the scenario investigated. Spatial heterogeneity of introgression within a given taxon is thus an expected neutral pattern in structured populations after a biological invasion with a low to moderate amount of hybridization. We further show that this pattern is consistent with published empirical observations. Using additional simulations, we argue that the spatial pattern of Neanderthal introgression in modern humans, which has been documented to be higher in Asia than in Europe, can be explained by a model of hybridization with Neanderthals in Eurasia during the range expansion of modern humans from Africa. Our results support the view that weak hybridization during range expansion may explain spatially heterogeneous introgression patterns without the need to invoke selection.
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12
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Quilodrán CS, Montoya-Burgos JI, Currat M. Harmonizing hybridization dissonance in conservation. Commun Biol 2020; 3:391. [PMID: 32694629 PMCID: PMC7374702 DOI: 10.1038/s42003-020-1116-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 06/25/2020] [Indexed: 12/24/2022] Open
Abstract
A dramatic increase in the hybridization between historically allopatric species has been induced by human activities. However, the notion of hybridization seems to lack consistency in two respects. On the one hand, it is inconsistent with the biological species concept, which does not allow for interbreeding between species, and on the other hand, it is considered either as an evolutionary process leading to the emergence of new biodiversity or as a cause of biodiversity loss, with conservation implications. In the first case, we argue that conservation biology should avoid the discussion around the species concept and delimit priorities of conservation units based on the impact on biodiversity if taxa are lost. In the second case, we show that this is not a paradox but an intrinsic property of hybridization, which should be considered in conservation programmes. We propose a novel view of conservation guidelines, in which human-induced hybridization may also be a tool to enhance the likelihood of adaptation to changing environmental conditions or to increase the genetic diversity of taxa affected by inbreeding depression. The conservation guidelines presented here represent a guide for the development of programmes aimed at protecting biodiversity as a dynamic evolutionary system.
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Affiliation(s)
- Claudio S Quilodrán
- Department of Zoology, University of Oxford, Oxford, United Kingdom.
- Laboratory of Anthropology, Genetics and Peopling History, Anthropology Unit, Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland.
| | - Juan I Montoya-Burgos
- Laboratory of Vertebrate Evolution, Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (IGE3), Geneva, Switzerland
| | - Mathias Currat
- Laboratory of Anthropology, Genetics and Peopling History, Anthropology Unit, Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (IGE3), Geneva, Switzerland
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13
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Bangs MR, Douglas MR, Brunner PC, Douglas ME. Reticulate evolution as a management challenge: Patterns of admixture with phylogenetic distance in endemic fishes of western North America. Evol Appl 2020; 13:1400-1419. [PMID: 32684966 PMCID: PMC7359839 DOI: 10.1111/eva.13042] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 05/20/2020] [Accepted: 05/26/2020] [Indexed: 12/12/2022] Open
Abstract
Admixture in natural populations is a long-standing management challenge, with population genomic approaches offering means for adjudication. We now more clearly understand the permeability of species boundaries and the potential of admixture for promoting adaptive evolution. These issues particularly resonate in western North America, where tectonism and aridity have fragmented and reshuffled rivers over millennia, in turn promoting reticulation among endemic fishes, a situation compounded by anthropogenic habitat modifications and non-native introductions. The melding of historic and contemporary admixture has both confused and stymied management. We underscore this situation with a case study that quantifies basin-wide admixture among a group of native and introduced fishes by employing double-digest restriction site-associated DNA (ddRAD) sequencing. Our approach: (a) quantifies the admixed history of 343 suckers (10 species of Catostomidae) across the Colorado River Basin; (b) gauges admixture within the context of phylogenetic distance and "ecological specialization"; and (c) extrapolates potential drivers of introgression across hybrid crosses that involve endemic as well as invasive species. Our study extends across an entire freshwater basin and expands previous studies more limited in scope both geographically and taxonomically. Our results detected admixture involving all 10 species, with habitat alterations not only accelerating the breakdown of reproductive isolation, but also promoting introgression. Hybridization occurred across the genus despite phylogenetic distance, whereas introgression was only detected within subgenera, implicating phylogenetic distance and/or ecological specialization as drivers of reproductive isolation. Understanding the extent of admixture and reproductive isolation across multiple species serves to disentangle their reticulate evolutionary histories and provides a broadscale perspective for basin-wide conservation and management.
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Affiliation(s)
- Max R. Bangs
- Department of Biological SciencesUniversity of ArkansasFayettevilleARUSA
- Department of Biological SciencesFlorida State UniversityTallahasseeFLUSA
| | - Marlis R. Douglas
- Department of Biological SciencesUniversity of ArkansasFayettevilleARUSA
| | - Patrick C. Brunner
- Integrative BiologySwiss Federal Institute of Technology (ETH)ZürichSwitzerland
| | - Michael E. Douglas
- Department of Biological SciencesUniversity of ArkansasFayettevilleARUSA
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14
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Population genetics assessment model reveals priority protection of genetic resources in native pig breeds in China. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2019.e00829] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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15
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Selechnik D, Richardson MF, Shine R, Brown GP, Rollins LA. Immune and environment-driven gene expression during invasion: An eco-immunological application of RNA-Seq. Ecol Evol 2019; 9:6708-6721. [PMID: 31236254 PMCID: PMC6580278 DOI: 10.1002/ece3.5249] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 12/18/2022] Open
Abstract
Host-pathogen associations change rapidly during a biological invasion and are predicted to impose strong selection on immune function. It has been proposed that the invader may experience an abrupt reduction in pathogen-mediated selection ("enemy release"), thereby favoring decreased investment into "costly" immune responses. Across plants and animals, there is mixed support for this prediction. Pathogens are not the only form of selection imposed on invaders; differences in abiotic environmental conditions between native and introduced ranges are also expected to drive rapid evolution. Here, we use RNA-Seq to assess the expression patterns of immune and environmentally associated genes in the cane toad (Rhinella marina) across its invasive Australian range. Transcripts encoding mediators of costly immune responses (inflammation, cytotoxicity) showed a curvilinear relationship with invasion history, with highest expression in toads from oldest and newest colonized areas. This pattern is surprising given theoretical expectations of density dynamics in invasive species and may be because density influences both intraspecific competition and parasite transmission, generating conflicting effects on the strength of immune responses. Alternatively, this expression pattern may be the result of other evolutionary forces, such as spatial sorting and genetic drift, working simultaneously with natural selection. Our findings do not support predictions about immune function based on the enemy release hypothesis and suggest instead that the effects of enemy release are difficult to isolate in wild populations, especially in the absence of information regarding parasite and pathogen infection. Additionally, expression patterns of genes underlying putatively environmentally associated traits are consistent with previous genetic studies, providing further support that Australian cane toads have adapted to novel abiotic challenges.
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Affiliation(s)
- Daniel Selechnik
- School of Life and Environmental Sciences (SOLES)University of SydneySydneyNew South WalesAustralia
| | - Mark F. Richardson
- Deakin Genomics Centre, School of Life and Environmental SciencesDeakin UniversityGeelongVictoriaAustralia
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityGeelongVictoriaAustralia
| | - Richard Shine
- School of Life and Environmental Sciences (SOLES)University of SydneySydneyNew South WalesAustralia
| | - Gregory P. Brown
- School of Life and Environmental Sciences (SOLES)University of SydneySydneyNew South WalesAustralia
| | - Lee Ann Rollins
- Centre for Integrative Ecology, School of Life and Environmental SciencesDeakin UniversityGeelongVictoriaAustralia
- Evolution & Ecology Research Centre, School of Biological, Earth and Environmental SciencesUNSW SydneySydneyNew South WalesAustralia
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16
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Pervasive population genomic consequences of genome duplication in Arabidopsis arenosa. Nat Ecol Evol 2019; 3:457-468. [DOI: 10.1038/s41559-019-0807-4] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 01/10/2019] [Indexed: 12/30/2022]
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17
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Yeakel JD, Gibert JP, Gross T, Westley PAH, Moore JW. Eco-evolutionary dynamics, density-dependent dispersal and collective behaviour: implications for salmon metapopulation robustness. Philos Trans R Soc Lond B Biol Sci 2019; 373:rstb.2017.0018. [PMID: 29581402 PMCID: PMC5882987 DOI: 10.1098/rstb.2017.0018] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2018] [Indexed: 11/12/2022] Open
Abstract
The spatial dispersal of individuals plays an important role in the dynamics of populations, and is central to metapopulation theory. Dispersal provides connections within metapopulations, promoting demographic and evolutionary rescue, but may also introduce maladapted individuals, potentially lowering the fitness of recipient populations through introgression of heritable traits. To explore this dual nature of dispersal, we modify a well-established eco-evolutionary model of two locally adapted populations and their associated mean trait values, to examine recruiting salmon populations that are connected by density-dependent dispersal, consistent with collective migratory behaviour that promotes navigation. When the strength of collective behaviour is weak such that straying is effectively constant, we show that a low level of straying is associated with the highest gains in metapopulation robustness and that high straying serves to erode robustness. Moreover, we find that as the strength of collective behaviour increases, metapopulation robustness is enhanced, but this relationship depends on the rate at which individuals stray. Specifically, strong collective behaviour increases the presence of hidden low-density basins of attraction, which may serve to trap disturbed populations, and this is exacerbated by increased habitat heterogeneity. Taken as a whole, our findings suggest that density-dependent straying and collective migratory behaviour may help metapopulations, such as in salmon, thrive in dynamic landscapes. Given the pervasive eco-evolutionary impacts of dispersal on metapopulations, these findings have important ramifications for the conservation of salmon metapopulations facing both natural and anthropogenic contemporary disturbances.This article is part of the theme issue 'Collective movement ecology'.
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Affiliation(s)
- Justin D Yeakel
- School of Natural Sciences, University of California, Merced, CA 95340, USA .,The Santa Fe Institute, Santa Fe, NM 87501, USA
| | - Jean P Gibert
- School of Natural Sciences, University of California, Merced, CA 95340, USA
| | - Thilo Gross
- Department of Engineering Mathematics, University of Bristol, Bristol BS8 1TH, UK
| | - Peter A H Westley
- Department of Fisheries, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Jonathan W Moore
- Earth2Oceans Research Group, Simon Fraser University, Burnaby BC, Canada V5A 1S6
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18
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Diedericks G, Henriques R, von der Heyden S, Weyl OLF, Hui C. Sleeping with the enemy: introgressive hybridization in two invasive centrarchids. JOURNAL OF FISH BIOLOGY 2018; 93:405-410. [PMID: 29959774 DOI: 10.1111/jfb.13730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 06/15/2018] [Indexed: 05/25/2023]
Abstract
Introgressive hybridization between Micropterus dolomieu and Micropterus salmoides was assessed in their invaded South African range using nine microsatellite markers and two mtDNA gene regions. Although M. dolomieu and M. salmoides are distantly related, indicated by the large uncorrected pairwise distances observed between the two species, mitochondrial introgression and unidirectional admixture was detected.
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Affiliation(s)
- Genevieve Diedericks
- Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Matieland, Stellenbosch, South Africa
- Evolutionary Genomics Group, Department of Botany and Zoology, Stellenbosch University, Matieland, Stellenbosch, South Africa
| | - Romina Henriques
- Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Lyngby, Denmark
| | - Sophie von der Heyden
- Evolutionary Genomics Group, Department of Botany and Zoology, Stellenbosch University, Matieland, Stellenbosch, South Africa
| | - Olaf L F Weyl
- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South African Institute for Aquatic Biodiversity (SAIAB), Grahamstown, South Africa
- Centre for Invasion Biology, South African Institute for Aquatic Biodiversity (SAIAB), Grahamstown, South Africa
| | - Cang Hui
- Centre for Invasion Biology, Department of Mathematical Sciences, Stellenbosch University, Matieland, Stellenbosch, South Africa
- Mathematical Biosciences Group, African Institute for Mathematical Sciences, Cape Town, South Africa
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19
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Beninde J, Feldmeier S, Veith M, Hochkirch A. Admixture of hybrid swarms of native and introduced lizards in cities is determined by the cityscape structure and invasion history. Proc Biol Sci 2018; 285:rspb.2018.0143. [PMID: 30051861 DOI: 10.1098/rspb.2018.0143] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/16/2018] [Indexed: 12/15/2022] Open
Abstract
Introductions of non-native lineages increase opportunities for hybridization. Non-native lineages of the common wall lizard, Podarcis muralis, are frequently introduced in cities where they hybridize with native populations. We aimed at unravelling the invasion history and admixture of native and non-native wall lizards in four German cities using citywide, comprehensive sampling. We barcoded and genotyped 826 lizards and tested if gene flow in populations composed of admixed native and introduced lineages is facilitated by similar environmental factors to those in native populations by comparing fine-scale landscape genetic patterns. In cities with non-native lineages, lizards commonly occurred in numerous clusters of hybrid swarms, which showed variable lineage composition, consisting of up to four distinct evolutionary lineages. Hybrid swarms held vast genetic diversity and showed recent admixture with other hybrid swarms. Landscape genetic analyses showed differential effects of cityscape structures across cities, but identified water bodies as strong barriers to gene flow in both native and admixed populations. By contrast, railway tracks facilitated gene flow of admixed populations only. Our study shows that cities represent unique settings for hybridization, caused by multiple introductions of non-native taxa. Cityscape structure and invasion histories of cities will determine future evolutionary pathways at these novel hybrid zones.
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Affiliation(s)
- Joscha Beninde
- Department of Biogeography, Trier University, 54286 Trier, Germany
| | | | - Michael Veith
- Department of Biogeography, Trier University, 54286 Trier, Germany
| | - Axel Hochkirch
- Department of Biogeography, Trier University, 54286 Trier, Germany
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20
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Ba H, Li Z, Yang Y, Li C. Development of Diagnostic SNP Markers To Monitor Hybridization Between Sika Deer ( Cervus nippon) and Wapiti ( Cervus elaphus). G3 (BETHESDA, MD.) 2018; 8:2173-2179. [PMID: 29789312 PMCID: PMC6027871 DOI: 10.1534/g3.118.200417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Sika deer (Cervus Nippon) and wapiti (Cervus elaphus) are closely related species and their hybridization can result in significant allele-shift of their gene pool. Additive genetic effects and putative heterotic effects of their hybridization on growth performance could confer considerable economic advantage in deer farming. Here, we used double-digest restriction site-associated DNA sequencing technology (ddRAD-seq) and detected ∼320,000 genome-wide SNPs from 30 captive individuals: 7 sika deer, 6 wapiti and 17 F1 hybrids (reciprocal cross). By screening observed heterozygosity of each SNP across four taxonomic groups, we report for the first time a resource of 2,015 putative diagnostic SNP markers (species-specific SNPs for sika deer and wapiti), which can be used to design tools for assessing or monitoring the degree of hybridization between sika deer and wapiti. These ddRAD-seq data and SNP datasets are also valuable resources for genome-wide studies, including trait discovery for breeders of domestic deer.
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Affiliation(s)
- Hengxing Ba
- State Key Laboratory for Molecular Biology of Special Wild Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, No. 4899, Juye Street, Jingyue District, Changchun, Jilin province, 130112, P.R. China
| | - Zhipeng Li
- State Key Laboratory for Molecular Biology of Special Wild Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, No. 4899, Juye Street, Jingyue District, Changchun, Jilin province, 130112, P.R. China
| | - Yifeng Yang
- State Key Laboratory for Molecular Biology of Special Wild Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, No. 4899, Juye Street, Jingyue District, Changchun, Jilin province, 130112, P.R. China
| | - Chunyi Li
- State Key Laboratory for Molecular Biology of Special Wild Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, No. 4899, Juye Street, Jingyue District, Changchun, Jilin province, 130112, P.R. China
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21
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Kovach RP, Hand BK, Hohenlohe PA, Cosart TF, Boyer MC, Neville HH, Muhlfeld CC, Amish SJ, Carim K, Narum SR, Lowe WH, Allendorf FW, Luikart G. Vive la résistance: genome-wide selection against introduced alleles in invasive hybrid zones. Proc Biol Sci 2017; 283:rspb.2016.1380. [PMID: 27881749 DOI: 10.1098/rspb.2016.1380] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 10/25/2016] [Indexed: 12/11/2022] Open
Abstract
Evolutionary and ecological consequences of hybridization between native and invasive species are notoriously complicated because patterns of selection acting on non-native alleles can vary throughout the genome and across environments. Rapid advances in genomics now make it feasible to assess locus-specific and genome-wide patterns of natural selection acting on invasive introgression within and among natural populations occupying diverse environments. We quantified genome-wide patterns of admixture across multiple independent hybrid zones of native westslope cutthroat trout and invasive rainbow trout, the world's most widely introduced fish, by genotyping 339 individuals from 21 populations using 9380 species-diagnostic loci. A significantly greater proportion of the genome appeared to be under selection favouring native cutthroat trout (rather than rainbow trout), and this pattern was pervasive across the genome (detected on most chromosomes). Furthermore, selection against invasive alleles was consistent across populations and environments, even in those where rainbow trout were predicted to have a selective advantage (warm environments). These data corroborate field studies showing that hybrids between these species have lower fitness than the native taxa, and show that these fitness differences are due to selection favouring many native genes distributed widely throughout the genome.
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Affiliation(s)
- Ryan P Kovach
- Northern Rocky Mountain Science Center, US Geological Survey, Missoula, MT 59802, USA
| | - Brian K Hand
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA
| | - Paul A Hohenlohe
- Institute for Bioinformatics and Evolutionary Studies, Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Ted F Cosart
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | | | | | - Clint C Muhlfeld
- Northern Rocky Mountain Science Center, US Geological Survey, Missoula, MT 59802, USA.,Flathead Biological Station, University of Montana, Polson, MT 59860, USA
| | - Stephen J Amish
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Kellie Carim
- Wildlife Biology Program, University of Montana, Missoula, MT 59812, USA
| | - Shawn R Narum
- Hagerman Genetics Laboratory, Columbia River Inter-Tribal Fish Commission, Hagerman, ID 83332, USA
| | - Winsor H Lowe
- Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Fred W Allendorf
- Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Gordon Luikart
- Flathead Biological Station, University of Montana, Polson, MT 59860, USA.,Fish and Wildlife Genomics Group, Division of Biological Sciences, University of Montana, Missoula, MT, USA
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22
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Garcia-Elfring A, Barrett RDH, Combs M, Davies TJ, Munshi-South J, Millien V. Admixture on the northern front: population genomics of range expansion in the white-footed mouse (Peromyscus leucopus) and secondary contact with the deer mouse (Peromyscus maniculatus). Heredity (Edinb) 2017; 119:447-458. [PMID: 28902189 PMCID: PMC5677999 DOI: 10.1038/hdy.2017.57] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/29/2017] [Indexed: 01/03/2023] Open
Abstract
Range expansion has genetic consequences expected to result in differentiated wave-front populations with low genetic variation and potentially introgression from a local species. The northern expansion of Peromyscus leucopus in southern Quebec provides an opportunity to test these predictions using population genomic tools. Our results show evidence of recent and post-glacial expansion. Genome-wide variation in P. leucopus indicates two post-glacial lineages are separated by the St. Lawrence River, with a more recent divergence of populations isolated by the Richelieu River. In two of three transects we documented northern populations with low diversity in at least one genetic measure, although most relationships were not significant. Consistent with bottlenecks and allele surfing during northward expansion, we document a northern-most population with low nucleotide diversity, divergent allele frequencies and the most private alleles, and observed heterozygosity indicates outcrossing. Ancestry proportions revealed putative hybrids of P. leucopus and P. maniculatus. A formal test for gene flow confirmed secondary contact, showing that a reticulate population phylogeny between P. maniculatus and P. leucopus was a better fit to the data than a bifurcating model without gene flow. Thus, we provide the first genomic evidence of gene flow between this pair of species in natural populations. Understanding the evolutionary consequences of secondary contact is an important conservation concern as climate-induced range expansions are expected to result in new hybrid zones between closely related species.
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Affiliation(s)
- A Garcia-Elfring
- Redpath Museum, McGill University, Montreal, QC, Canada
- Department of Biology, McGill University, Montreal, QC, Canada
| | - R D H Barrett
- Redpath Museum, McGill University, Montreal, QC, Canada
| | - M Combs
- Louis Calder Center, Biological Field Station, Fordham University, Armonk, NY, USA
| | - T J Davies
- Department of Biology, McGill University, Montreal, QC, Canada
| | - J Munshi-South
- Louis Calder Center, Biological Field Station, Fordham University, Armonk, NY, USA
| | - V Millien
- Redpath Museum, McGill University, Montreal, QC, Canada
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23
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Muhlfeld CC, Kovach RP, Al-Chokhachy R, Amish SJ, Kershner JL, Leary RF, Lowe WH, Luikart G, Matson P, Schmetterling DA, Shepard BB, Westley PAH, Whited D, Whiteley A, Allendorf FW. Legacy introductions and climatic variation explain spatiotemporal patterns of invasive hybridization in a native trout. GLOBAL CHANGE BIOLOGY 2017; 23:4663-4674. [PMID: 28374524 DOI: 10.1111/gcb.13681] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 02/24/2017] [Accepted: 02/28/2017] [Indexed: 06/07/2023]
Abstract
Hybridization between invasive and native species, a significant threat to worldwide biodiversity, is predicted to increase due to climate-induced expansions of invasive species. Long-term research and monitoring are crucial for understanding the ecological and evolutionary processes that modulate the effects of invasive species. Using a large, multidecade genetics dataset (N = 582 sites, 12,878 individuals) with high-resolution climate predictions and extensive stocking records, we evaluate the spatiotemporal dynamics of hybridization between native cutthroat trout and invasive rainbow trout, the world's most widely introduced invasive fish, across the Northern Rocky Mountains of the United States. Historical effects of stocking and contemporary patterns of climatic variation were strongly related to the spread of hybridization across space and time. The probability of occurrence, extent of, and temporal changes in hybridization increased at sites in close proximity to historical stocking locations with greater rainbow trout propagule pressure, warmer water temperatures, and lower spring precipitation. Although locations with warmer water temperatures were more prone to hybridization, cold sites were not protected from invasion; 58% of hybridized sites had cold mean summer water temperatures (<11°C). Despite cessation of stocking over 40 years ago, hybridization increased over time at half (50%) of the locations with long-term data, the vast majority of which (74%) were initially nonhybridized, emphasizing the chronic, negative impacts of human-mediated hybridization. These results show that effects of climate change on biodiversity must be analyzed in the context of historical human impacts that set ecological and evolutionary trajectories.
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Affiliation(s)
- Clint C Muhlfeld
- Northern Rocky Mountain Science Center, U.S. Geological Survey, West Glacier, MT, USA
- Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT, USA
| | - Ryan P Kovach
- Northern Rocky Mountain Science Center, U.S. Geological Survey, West Glacier, MT, USA
| | - Robert Al-Chokhachy
- Northern Rocky Mountain Science Center, U.S. Geological Survey, Bozeman, MT, USA
| | - Stephen J Amish
- Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT, USA
| | - Jeffrey L Kershner
- Northern Rocky Mountain Science Center, U.S. Geological Survey, Bozeman, MT, USA
| | - Robb F Leary
- Montana Fish, Wildlife and Parks, Missoula, MT, USA
| | - Winsor H Lowe
- Division of Biological Sciences, University of Montana, Missoula, MT, USA
| | - Gordon Luikart
- Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT, USA
| | - Phil Matson
- Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT, USA
| | | | | | - Peter A H Westley
- School of Fisheries and Ocean Sciences, University of Alaska, Fairbanks, AK, USA
| | - Diane Whited
- Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT, USA
| | - Andrew Whiteley
- Wildlife Biology Program, Department of Ecosystem and Conservation Sciences, College of Forestry and Conservation, University of Montana, Missoula, MT, USA
| | - Fred W Allendorf
- Division of Biological Sciences, University of Montana, Missoula, MT, USA
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24
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Yannic G, Statham MJ, Denoyelle L, Szor G, Qulaut GQ, Sacks BN, Lecomte N. Investigating the ancestry of putative hybrids: are Arctic fox and red fox hybridizing? Polar Biol 2017. [DOI: 10.1007/s00300-017-2126-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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26
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Willoughby JR, Christie MR. Captive Ancestry Upwardly Biases Estimates of Relative Reproductive Success. J Hered 2017; 108:583-587. [PMID: 28499014 DOI: 10.1093/jhered/esx046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 05/02/2017] [Indexed: 12/19/2022] Open
Abstract
Abstract
Supplementation programs, which release captive-born individuals into the wild, are commonly used to demographically bolster declining populations. In order to evaluate the effectiveness of these programs, the reproductive success of captive-born individuals released into the wild is often compared to the reproductive success of wild-born individuals in the recipient population (relative reproductive success, RRS). However, if there are heritable reductions in fitness associated with captive breeding, gene flow from captive-born individuals into the wild population can reduce the fitness of the wild population. Here, we show that when captive ancestry in the wild population reduces mean population fitness, estimates of RRS are upwardly biased, meaning that the relative fitness of captive-born individuals is over-estimated. Furthermore, the magnitude of this bias increases with the length of time that a supplementation program has been releasing captive-born individuals. This phenomenon has long-term conservation impacts since management decisions regarding the design of a supplementation program and the number of individuals to release can be based, at least in part, on RRS estimates. Therefore, we urge caution in the interpretation of relative fitness measures when the captive ancestry of the wild population cannot be precisely measured.
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Affiliation(s)
- Janna R Willoughby
- Department of Biological Sciences, Purdue University, West Lafayette, IN
| | - Mark R Christie
- Department of Biological Sciences, Purdue University, West Lafayette, IN
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN
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27
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Veličković N, Ferreira E, Djan M, Ernst M, Obreht Vidaković D, Monaco A, Fonseca C. Demographic history, current expansion and future management challenges of wild boar populations in the Balkans and Europe. Heredity (Edinb) 2016; 117:348-357. [PMID: 27436523 PMCID: PMC5061920 DOI: 10.1038/hdy.2016.53] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 05/31/2016] [Accepted: 06/08/2016] [Indexed: 02/01/2023] Open
Abstract
Wild boar (Sus scrofa), one of the most widespread wildlife species, has entered a stage of continuous growth in Europe, and could even be considered a pest species. We analysed microsatellite variability in 723 wild boars from across Europe, including the northern Dinaric Balkans. Our aims were: (1) to define the population structure of wild boars in the Balkans and its relation with other European populations; (2) to estimate effective populations sizes, levels of intra- and inter-population diversity, inbreeding migration and gene flow patterns; (3) to test subpopulations for bottlenecks; (4) to interpret these results in light of current knowledge about the demographic history of wild boars in Europe; and (5) to discuss the relevance of these findings for management and conservation. Strong population structuring was observed and 14 subpopulations were revealed. High genetic diversity was found, and besides the well-known identity of the Italian populations of Sardinia and Castelporziano, we bring new insights into other potential relevant, refugial populations such as Littoral Slovenia, South Portugal, North-western Iberia and an entire cluster in the Balkans. There was evidence of gene flow going from these refugial subpopulations towards less peripheral and more admixed subpopulations. Recent population bottlenecks and expansions were detected, mostly in the peninsular refuge subpopulations. The results are consistent with the fluctuations of wild boar numbers in Europe since the beginning of the twentieth century. These results should be taken into account in future conservation and management plans for wild boar populations in Europe.
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Affiliation(s)
- N Veličković
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - E Ferreira
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - M Djan
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - M Ernst
- Department of Forest Protection and Wildlife Management, Mendel University in Brno, Brno, Czech Republic
| | - D Obreht Vidaković
- Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - A Monaco
- Regional Parks Agency–Lazio Region, Rome, Italy
| | - C Fonseca
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
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28
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The Tangled Evolutionary Legacies of Range Expansion and Hybridization. Trends Ecol Evol 2016; 31:677-688. [DOI: 10.1016/j.tree.2016.06.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/27/2016] [Accepted: 06/29/2016] [Indexed: 01/15/2023]
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29
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Wielstra B, Burke T, Butlin RK, Schaap O, Shaffer HB, Vrieling K, Arntzen JW. Efficient screening for ‘genetic pollution’ in an anthropogenic crested newt hybrid zone. CONSERV GENET RESOUR 2016. [DOI: 10.1007/s12686-016-0582-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Mastrantonio V, Porretta D, Urbanelli S, Crasta G, Nascetti G. Dynamics of mtDNA introgression during species range expansion: insights from an experimental longitudinal study. Sci Rep 2016; 6:30355. [PMID: 27460445 PMCID: PMC4962091 DOI: 10.1038/srep30355] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 06/30/2016] [Indexed: 11/23/2022] Open
Abstract
Introgressive hybridization represents one of the long-lasting debated genetic consequences of species range expansion. Mitochondrial DNA has been shown to heavily introgress between interbreeding animal species that meet in new sympatric areas and, often, asymmetric introgression from local to the colonizing populations has been observed. Disentangling among the evolutionary and ecological processes that might shape this pattern remains difficult, because they continuously act across time and space. In this context, long-term studies can be of paramount importance. Here, we investigated the dynamics of mitochondrial introgression between two mosquito species (Aedes mariae and Ae. zammitii ) during a colonization event that started in 1986 after a translocation experiment. By analyzing 1,659 individuals across 25 years, we showed that introgression occurred earlier and at a higher frequency in the introduced than in the local species, showing a pattern of asymmetric introgression. Throughout time, introgression increased slowly in the local species, becoming reciprocal at most sites. The rare opportunity to investigate the pattern of introgression across time during a range expansion along with the characteristics of our study-system allowed us to support a role of demographic dynamics in determining the observed introgression pattern.
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Affiliation(s)
- V Mastrantonio
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - D Porretta
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - S Urbanelli
- Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
| | - G Crasta
- Department of Mathematics, Sapienza University of Rome, Rome, Italy
| | - G Nascetti
- Department of Ecological and Biological Sciences, Tuscia University, Viterbo, Italy
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Kovach RP, Luikart G, Lowe WH, Boyer MC, Muhlfeld CC. Risk and efficacy of human-enabled interspecific hybridization for climate-change adaptation: response to Hamilton and Miller (2016). CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2016; 30:428-430. [PMID: 26918487 DOI: 10.1111/cobi.12678] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 10/19/2015] [Indexed: 06/05/2023]
Affiliation(s)
- Ryan P Kovach
- U.S. Geological Survey, Northern Rocky Mountain Science Center, Glacier National Park West Glacier, MT, 59936, U.S.A
| | - Gordon Luikart
- Flathead Lake Biological Station, University of Montana, Polson, MT, 59860, U.S.A
| | - Winsor H Lowe
- Division of Biological Sciences, University of Montana, Missoula, MT, 59812, U.S.A
| | | | - Clint C Muhlfeld
- U.S. Geological Survey, Northern Rocky Mountain Science Center, Glacier National Park West Glacier, MT, 59936, U.S.A
- Flathead Lake Biological Station, University of Montana, Polson, MT, 59860, U.S.A
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32
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Phillips BL, Baird SJE. Spatial Sorting Unlikely to Promote Maladaptive Hybridization: Response to Lowe, Muhlfeld, and Allendorf. Trends Ecol Evol 2015; 30:564-565. [PMID: 26411611 DOI: 10.1016/j.tree.2015.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 08/11/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Ben L Phillips
- School of Biosciences, University of Melbourne, Parkville, Australia.
| | - Stuart J E Baird
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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