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Invasive species hybridization and introgression

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https://www.readbyqxmd.com/read/28422135/genomic-evidence-of-hybridization-between-two-independent-invasions-of-european-green-crab-carcinus-maenas-in-the-northwest-atlantic
#1
N W Jeffery, C DiBacco, B F Wringe, R R E Stanley, L C Hamilton, P N Ravindran, I R Bradbury
Invasive species have been associated with significant negative impacts in their introduced range often outcompeting native species, yet the long-term evolutionary dynamics of biological invasions are not well understood. Hybridization, either among waves of invasion or between native and introduced populations, could alter the ecological and evolutionary impacts of invasions yet has rarely been studied in marine invasive species. The European green crab (Carcinus maenas) invaded eastern North America twice from northern and southern locations in its native range...
April 19, 2017: Heredity
https://www.readbyqxmd.com/read/28265489/species-specific-markers-provide-molecular-genetic-evidence-for-natural-introgression-of-bullhead-catfishes-in-hungary
#2
Beatrix Béres, Dóra Kánainé Sipos, Tamás Müller, Ádám Staszny, Milán Farkas, Katalin Bakos, László Orbán, Béla Urbányi, Balázs Kovács
Since three bullhead catfish species were introduced to Europe in the late 19th century, they have spread to most European countries. In Hungary, the brown bullhead (Ameiurus nebulosus) was more widespread in the 1970s-1980s, but the black bullhead (Ameiurus melas) has gradually supplanted since their second introduction in 1980. The introgressive hybridization of the two species has been presumed based on morphological examinations, but it has not previously been supported by genetic evidence. In this study, 11 different Hungarian habitats were screened with a new species-specific nuclear genetic, duplex PCR based, marker system to distinguish the introduced catfish species, Ameiurus nebulosus, Ameiurus melas, and Ameiurus natalis, as well as the hybrids of the first two...
2017: PeerJ
https://www.readbyqxmd.com/read/28199337/investigating-hybridization-between-the-two-sibling-bat-species-myotis-myotis-and-m-blythii-from-guano-in-a-natural-mixed-maternity-colony
#3
Eve Afonso, Anne-Claude Goydadin, Patrick Giraudoux, Gilles Farny
Because they can form seasonal mixed-species groups during mating and maternal care, bats are exciting models for studying interspecific hybridization. Myotis myotis and M. blythii are genetically close and morphologically almost identical, but they differ in some aspects of their ecology and life-history traits. When they occur in sympatry, they often form large mixed maternity colonies, in which their relative abundance can vary across time due to a shift in the timing of parturition. For the first time, we used non-invasive genetic methods to assess the hybridization rate and colony composition in a maternity colony of M...
2017: PloS One
https://www.readbyqxmd.com/read/28125068/potential-hybridization-between-two-invasive-termite-species-coptotermes-formosanus-and-c-gestroi-isoptera-rhinotermitidae-and-its-biological-and-economic-implications
#4
REVIEW
Nan-Yao Su, Thomas Chouvenc, Hou-Feng Li
The Asian subterranean termite, Coptotermes gestroi, is a tropical species but has increasingly been collected from the subtropics in recent years, making it sympatric to the Formosan subterranean termite, C. formosanus in at least three areas, Taiwan, Hawaii, and Florida. Simultaneous flights by these two species were observed since 2013 in South Florida, during which interspecies tandems were observed. Laboratory mating of C. formosanus and C. gestroi alates produced hybrid incipient colonies of larger population size...
January 25, 2017: Insects
https://www.readbyqxmd.com/read/28035234/genetic-diversity-and-connectivity-within-mytilus-spp-in-the-subarctic-and-arctic
#5
Sofie Smedegaard Mathiesen, Jakob Thyrring, Jakob Hemmer-Hansen, Jørgen Berge, Alexey Sukhotin, Peter Leopold, Michaël Bekaert, Mikael Kristian Sejr, Einar Eg Nielsen
Climate changes in the Arctic are predicted to alter distributions of marine species. However, such changes are difficult to quantify because information on present species distribution and the genetic variation within species is lacking or poorly examined. Blue mussels, Mytilus spp., are ecosystem engineers in the coastal zone globally. To improve knowledge of distribution and genetic structure of the Mytilus edulis complex in the Arctic, we analyzed 81 SNPs in 534 Mytilus spp. individuals sampled at 13 sites to provide baseline data for distribution and genetic variation of Mytilus mussels in the European Arctic...
January 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28031797/transcriptomic-comparison-of-invasive-bigheaded-carps-hypophthalmichthys-nobilis-and-hypophthalmichthys-molitrix-and-their-hybrids
#6
Jun Wang, James T Lamer, Sarah Gaughan, Michael Wachholtz, Chenghui Wang, Guoqing Lu
Bighead carp (Hypophthalmichthys nobilis) and silver carp (Hypophthalmichthys molitrix), collectively called bigheaded carps, are invasive species in the Mississippi River Basin (MRB). Interspecific hybridization between bigheaded carps has been considered rare within their native rivers in China; however, it is prevalent in the MRB. We conducted de novo transcriptome analysis of pure and hybrid bigheaded carps and obtained 40,759 to 51,706 transcripts for pure, F1 hybrid, and backcross bigheaded carps. The search against protein databases resulted in 20,336-28,133 annotated transcripts (over 50% of the transcriptome) with over 13,000 transcripts mapped to 23 Gene Ontology biological processes and 127 KEGG metabolic pathways...
December 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28031790/a-genetically-distinct-hybrid-zone-occurs-for-two-globally-invasive-mosquito-fish-species-with-striking-phenotypic-resemblance
#7
Rebecca J Wilk, Lisa Horth
Hybrid zones allow for the investigation of incipient speciation and related evolutionary processes of selection, gene flow, and migration. Interspecific dynamics, like competition, can impact the size, shape, and directional movement of species in hybrid zones. Hybrid zones contribute to a paradox for the biological species concept because interbreeding between species occurs while parental forms remain distinct. A long-standing zone of intergradation or introgression exists for eastern and western mosquito fish (Gambusia holbrooki and G...
December 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28028055/the-role-of-hybridization-in-facilitating-tree-invasion
#8
REVIEW
John F Gaskin
Hybridization events can generate additional genetic diversity upon which natural selection can act and at times enhance invasiveness of the species. Invasive tree species are a growing ecological concern worldwide, and some of these invasions involve hybridization events pre- or post-introduction. There are 20 hybrid invasive tree taxa in 15 genera (11 plant families) discussed here. When reported, abundance of hybrids comprised 10-100% of an invasion, the remainder being parental taxa. In seven hybrid taxa researchers identified phenotypes that may make hybrids better invaders...
December 26, 2016: AoB Plants
https://www.readbyqxmd.com/read/27920788/vegetative-and-adaptive-traits-predict-different-outcomes-for-restoration-using-hybrids
#9
Philip A Crystal, Nathanael I Lichti, Keith E Woeste, Douglass F Jacobs
Hybridization has been implicated as a driver of speciation, extinction, and invasiveness, but can also provide resistant breeding stock following epidemics. However, evaluating the appropriateness of hybrids for use in restoration programs is difficult. Past the F1 generation, the proportion of a progenitor's genome can vary widely, as can the combinations of parental genomes. Detailed genetic analysis can reveal this information, but cannot expose phenotypic alterations due to heterosis, transgressive traits, or changes in metabolism or development...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27881749/vive-la-r%C3%A3-sistance-genome-wide-selection-against-introduced-alleles-in-invasive-hybrid-zones
#10
Ryan P Kovach, Brian K Hand, Paul A Hohenlohe, Ted F Cosart, Matthew C Boyer, Helen H Neville, Clint C Muhlfeld, Stephen J Amish, Kellie Carim, Shawn R Narum, Winsor H Lowe, Fred W Allendorf, Gordon Luikart
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...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27855708/metazoan-parasite-communities-support-for-the-biological-invasion-of-barbus-barbus-and-its-hybridization-with-the-endemic-barbus-meridionalis
#11
L Gettová, A Gilles, A Šimková
BACKGROUND: Recently, human intervention enabled the introduction of Barbus barbus from the Rhône River basin into the Barbus meridionalis habitats of the Argens River. After an introduction event, parasite loss and lower infection can be expected in non-native hosts in contrast to native species. Still, native species might be endangered by hybridization with the incomer and the introduction of novel parasite species. In our study, we aimed to examine metazoan parasite communities in Barbus spp...
November 17, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27828980/climate-demography-and-zoogeography-predict-introgression-thresholds-in-salmonid-hybrid-zones-in-rocky-mountain-streams
#12
Michael K Young, Daniel J Isaak, Kevin S McKelvey, Taylor M Wilcox, Daniel M Bingham, Kristine L Pilgrim, Kellie J Carim, Matthew R Campbell, Matthew P Corsi, Dona L Horan, David E Nagel, Michael K Schwartz
Among the many threats posed by invasions of nonnative species is introgressive hybridization, which can lead to the genomic extinction of native taxa. This phenomenon is regarded as common and perhaps inevitable among native cutthroat trout and introduced rainbow trout in western North America, despite that these taxa naturally co-occur in some locations. We conducted a synthetic analysis of 13,315 genotyped fish from 558 sites by building logistic regression models using data from geospatial stream databases and from 12 published studies of hybridization to assess whether environmental covariates could explain levels of introgression between westslope cutthroat trout and rainbow trout in the U...
2016: PloS One
https://www.readbyqxmd.com/read/27105397/introduced-scotch-broom-cytisus-scoparius-invades-the-genome-of-native-populations-in-vulnerable-heathland-habitats
#13
Lene Rostgaard Nielsen, Ursula Brandes, Erik Dahl Kjaer, Siri Fjellheim
Cytisus scoparius is a global invasive species that affects local flora and fauna at the intercontinental level. Its natural distribution spans across Europe, but seeds have also been moved among countries, mixing plants of native and non-native genetic origins. Hybridization between the introduced and native gene pool is likely to threaten both the native gene pool and the local flora. In this study, we address the potential threat of invasive C. scoparius to local gene pools in vulnerable heathlands. We used nuclear single nucleotide polymorphic (SNP) and simple sequence repeat (SSR) markers together with plastid SSR and indel markers to investigate the level and direction of gene flow between invasive and native heathland C...
June 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27069575/whole-genome-sequencing-reveals-small-genomic-regions-of-introgression-in-an-introduced-crater-lake-population-of-threespine-stickleback
#14
Kohta Yoshida, Ryutaro Miyagi, Seiichi Mori, Aya Takahashi, Takashi Makino, Atsushi Toyoda, Asao Fujiyama, Jun Kitano
Invasive species pose a major threat to biological diversity. Although introduced populations often experience population bottlenecks, some invasive species are thought to be originated from hybridization between multiple populations or species, which can contribute to the maintenance of high genetic diversity. Recent advances in genome sequencing enable us to trace the evolutionary history of invasive species even at whole-genome level and may help to identify the history of past hybridization that may be overlooked by traditional marker-based analysis...
April 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27011898/an-ecological-approach-to-measuring-the-evolutionary-consequences-of-gene-flow-from-crops-to-wild-or-weedy-relatives
#15
Lesley G Campbell, David Lee, Kruti Shukla, Thomas A Waite, Detlef Bartsch
PREMISE OF THE STUDY: Agricultural practices routinely create opportunities for crops to hybridize with wild relatives, leading to crop gene introgression into wild genomes. Conservationists typically worry this introgression could lead to genetic homogenization of wild populations, over and above the central concern of transgene escape. Alternatively, viewing introgression as analogous to species invasion, we suggest that increased genetic diversity may likewise be an undesirable outcome...
March 2016: Applications in Plant Sciences
https://www.readbyqxmd.com/read/26878870/evolutionary-relationships-among-extinct-and-extant-sloths-the-evidence-of-mitogenomes-and-retroviruses
#16
Graham J Slater, Pin Cui, Analía M Forasiepi, Dorina Lenz, Kyriakos Tsangaras, Bryson Voirin, Nadia de Moraes-Barros, Ross D E MacPhee, Alex D Greenwood
Macroevolutionary trends exhibited by retroviruses are complex and not entirely understood. The sloth endogenized foamy-like retrovirus (SloEFV), which demonstrates incongruence in virus-host evolution among extant sloths (Order Folivora), has not been investigated heretofore in any extinct sloth lineages and its premodern history within folivorans is therefore unknown. Determining retroviral coevolutionary trends requires a robust phylogeny of the viral host, but the highly reduced modern sloth fauna (6 species in 2 genera) does not adequately represent what was once a highly diversified clade (∼100 genera) of placental mammals...
February 14, 2016: Genome Biology and Evolution
https://www.readbyqxmd.com/read/26840428/revisiting-a-classic-case-of-introgression-hybridization-and-gene-flow-in-californian-sunflowers
#17
Gregory L Owens, Gregory J Baute, Loren H Rieseberg
During invasion, colonizing species can hybridize with native species, potentially swamping out native genomes. However, theory predicts that introgression will often be biased into the invading species. Thus, empirical estimates of gene flow between native and invasive species are important to quantify the actual threat of hybridization with invasive species. One classic example of introgression occurs in California, where Helianthus bolanderi was thought to be a hybrid between the serpentine endemic Helianthus exilis and the congeneric invader Helianthus annuus...
June 2016: Molecular Ecology
https://www.readbyqxmd.com/read/26664677/does-hybridization-with-a-widespread-congener-threaten-the-long-term-persistence-of-the-eastern-alpine-rare-local-endemic-knautia-carinthiaca
#18
Martin Čertner, Filip Kolář, Peter Schönswetter, Božo Frajman
Interspecific hybridization, especially when regularly followed by backcrossing (i.e., introgressive hybridization), conveys a substantial risk for many endangered organisms. This is particularly true for narrow endemics occurring within distributional ranges of widespread congeners. An excellent example is provided by the plant genus Knautia (Caprifoliaceae): Locally endemic K. carinthiaca is reported from two isolated populations in southern Austria situated within an area predominantly occupied by widespread K...
October 2015: Ecology and Evolution
https://www.readbyqxmd.com/read/26561027/when-anthropogenic-river-disturbance-decreases-hybridisation-between-non-native-and-endemic-cyprinids-and-drives-an-ecomorphological-displacement-towards-juvenile-state-in-both-species
#19
Emmanuel Corse, Nicolas Pech, Melthide Sinama, Caroline Costedoat, Rémi Chappaz, André Gilles
Understanding the impact of non-native species on native species is a major challenge in molecular ecology, particularly for genetically compatible fish species. Invasions are generally difficult to study because their effects may be confused with those of environmental or human disturbances. Colonized ecosystems are differently impacted by human activities, resulting in diverse responses and interactions between native and non-native species. We studied the dynamics between two Cyprinids species (invasive Chondrostoma nasus and endemic Parachondrostoma toxostoma) and their hybrids in 16 populations (from allopatric to sympatric situations and from little to highly fragmented areas) corresponding to 2,256 specimens...
2015: PloS One
https://www.readbyqxmd.com/read/26248187/molecular-characterization-of-natural-hybrids-formed-between-five-related-indigenous-clade-6-phytophthora-species
#20
Treena I Burgess
Most Phytophthora hybrids characterized to date have emerged from nurseries and managed landscapes, most likely generated as a consequence of biological invasions associated with the movement of living plants and germplasm for ornamental, horticultural and agricultural purposes. Presented here is evidence for natural hybridization among a group of five closely related indigenous clade 6 Phytophthora species isolated from waterways and riparian ecosystems in Western Australia. Molecular characterization of hybrids consisted of cloning and sequencing two nuclear genes (ITS and ASF), sequencing of two further nuclear loci (BT and HSP) and of two mitochondrial loci (COI and NADH)...
2015: PloS One
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