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Invasive species hybridization and introgression

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https://www.readbyqxmd.com/read/27920788/vegetative-and-adaptive-traits-predict-different-outcomes-for-restoration-using-hybrids
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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...
March 2016: Genome Biology and Evolution
https://www.readbyqxmd.com/read/26840428/revisiting-a-classic-case-of-introgression-hybridization-and-gene-flow-in-californian-sunflowers
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/26230080/introgression-between-invasive-and-native-blue-mussels-genus-mytilus-in-the-central-california-hybrid-zone
#13
Norah P Saarman, Grant H Pogson
The ecological and genetic factors determining the extent of introgression between species in secondary contact zones remain poorly understood. Here, we investigate the relative importance of isolating barriers and the demographic expansion of invasive Mytilus galloprovincialis on the magnitude and the direction of introgression with the native Mytilus trossulus in a hybrid zone in central California. We use double-digest restriction-site-associated DNA sequencing (ddRADseq) to genotype 1337 randomly selected single nucleotide polymorphisms and accurately distinguish early and advanced generation hybrids for the first time in the central California Mytilus spp...
September 2015: Molecular Ecology
https://www.readbyqxmd.com/read/26199370/morphology-delimits-more-species-than-molecular-genetic-clusters-of-invasive-pilosella
#14
Chandra E Moffat, David J Ensing, John F Gaskin, Rosemarie A De Clerck-Floate, Jason Pither
UNLABELLED:PREMISE OF THE STUDY: Accurate assessments of biodiversity are paramount for understanding ecosystem processes and adaptation to change. Invasive species often contribute substantially to local biodiversity; correctly identifying and distinguishing invaders is thus necessary to assess their potential impacts. We compared the reliability of morphology and molecular sequences to discriminate six putative species of invasive Pilosella hawkweeds (syn...
July 2015: American Journal of Botany
https://www.readbyqxmd.com/read/26096550/diagnostic-snps-reveal-widespread-introgressive-hybridization-between-introduced-bighead-and-silver-carp-in-the-mississippi-river-basin
#15
James T Lamer, Blake C Ruebush, Zarema H Arbieva, Michael A McClelland, John M Epifanio, Greg G Sass
Hybridization among conspecifics in native and introduced habitats has important implications for biological invasions in new ecosystems. Bighead (Hypophthalmichthys nobilis) and silver carp (H. molitrix) are genetically isolated and occur in sympatry within their native range. Following their introduction to North America, however, introgressant hybrids have been reported throughout their expanded range within the Mississippi River Basin (MRB). The extent of introgression, both spatially and generationally, is largely unknown...
August 2015: Molecular Ecology
https://www.readbyqxmd.com/read/26046351/genetic-evidence-of-hybridization-between-the-endangered-native-species-iguana-delicatissima-and-the-invasive-iguana-iguana-reptilia-iguanidae-in-the-lesser-antilles-management-implications
#16
Barbara Vuillaume, Victorien Valette, Olivier Lepais, Frédéric Grandjean, Michel Breuil
The worldwide increase of hybridization in different groups is thought to have become more important with the loss of isolating barriers and the introduction of invasive species. This phenomenon could result in the extinction of endemic species. This study aims at investigating the hybridization dynamics between the endemic and threatened Lesser Antillean iguana (Iguana delicatissima) and the invasive common green iguana (Iguana iguana) in the Lesser Antilles, as well as assessing the impact of interspecific hybridization on the decline of I...
2015: PloS One
https://www.readbyqxmd.com/read/25864837/exploring-origins-invasion-history-and-genetic-diversity-of-imperata-cylindrica-l-p-beauv-cogongrass-in-the-united-states-using-genotyping-by-sequencing
#17
A Millie Burrell, Alan E Pepper, George Hodnett, John A Goolsby, William A Overholt, Alexis E Racelis, Rodrigo Diaz, Patricia E Klein
Imperata cylindrica (Cogongrass, Speargrass) is a diploid C4 grass that is a noxious weed in 73 countries and constitutes a significant threat to global biodiversity and sustainable agriculture. We used a cost-effective genotyping-by-sequencing (GBS) approach to identify the reproductive system, genetic diversity and geographic origins of invasions in the south-eastern United States. In this work, we demonstrated the advantage of employing the closely related, fully sequenced crop species Sorghum bicolor (L...
May 2015: Molecular Ecology
https://www.readbyqxmd.com/read/25806968/hybridization-of-two-major-termite-invaders-as-a-consequence-of-human-activity
#18
Thomas Chouvenc, Ericka E Helmick, Nan-Yao Su
While hybridization of an invasive species with a native species is a common occurrence, hybridization between two invasive species is rare. Formosan subterranean termites (Coptotermes formosanus) and Asian subterranean termites (C. gestroi) are both ecologically successful and are the two most economically important termite pests in the world. Both species have spread throughout many areas of the world due to human activity; however, their distributions overlap in only three narrow areas because of distinct ecological requirements...
2015: PloS One
https://www.readbyqxmd.com/read/25685194/modelling-interspecific-hybridization-with-genome-exclusion-to-identify-conservation-actions-the-case-of-native-and-invasive-pelophylax-waterfrogs
#19
Claudio S Quilodrán, Juan I Montoya-Burgos, Mathias Currat
Interspecific hybridization occurs in nature but can also be caused by human actions. It often leads to infertile or fertile hybrids that exclude one parental genome during gametogenesis, escaping genetic recombination and introgression. The threat that genome-exclusion hybridization might represent on parental species is poorly understood, especially when invasive species are involved. Here, we show how to assess the effects of genome-exclusion hybridization and how to elaborate conservation actions by simulating scenarios using a model of nonintrogressive hybridization...
February 2015: Evolutionary Applications
https://www.readbyqxmd.com/read/25667601/biological-invasions-climate-change-and-genomics
#20
REVIEW
Steven L Chown, Kathryn A Hodgins, Philippa C Griffin, John G Oakeshott, Margaret Byrne, Ary A Hoffmann
The rate of biological invasions is expected to increase as the effects of climate change on biological communities become widespread. Climate change enhances habitat disturbance which facilitates the establishment of invasive species, which in turn provides opportunities for hybridization and introgression. These effects influence local biodiversity that can be tracked through genetic and genomic approaches. Metabarcoding and metagenomic approaches provide a way of monitoring some types of communities under climate change for the appearance of invasives...
January 2015: Evolutionary Applications
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