Directional genetic differentiation and relative migration

Sundqvist, Lisa; Keenan, Kevin G.; Zackrisson, Martin; Prodöhl, Paulo A.; Kleinhans, David

doi:10.1002/ece3.2096

Cited by 252 publications

(246 citation statements)

References 48 publications

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“…Significance was assessed using 10 100 permutations. Gene flow among populations was estimated by calculating the directional relative migration using the webbased software application divMigrate-online (Sundqvist et al 2016) based on the GST statistic (Nei 1973).…”

Section: Resultsmentioning

confidence: 99%

Origin and route of establishment of the invasive Pacific oyster Crassostrea gigas in Scandinavia

Faust¹,

André²,

Meurling³

et al. 2017

Mar. Ecol. Prog. Ser.

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such as shipping, trading and aquaculture. Once introduced, a successful invader can spread in the wild and establish feral populations, potentially leading to displacement of native species, changes in community structure and food webs, alterations in the abiotic environment, as well as function as a vector for parasites ABSTRACT: Identifying the routes and rates of introductions is fundamental for the understanding of marine invasions. Recurring introductions over the last 50 yr have led to the establishment of feral Pacific oyster Crassostrea gigas populations throughout Europe. In the northern countries, Sweden and Norway, the species first occurred in large numbers in 2006. Here, we investigated the relative importance of introduction via re-laying of cultured oysters imported for consumption from France, Ireland or the Netherlands, and dispersal of oyster larvae by ocean currents from wild oyster populations in Denmark. Using microsatellite DNA markers, we estimated genetic differentiation among Pacific oysters collected at 4 Swedish locations, 3 Norwegian locations and 9 potential source locations in Denmark, Ireland, the Netherlands and France. All Swedish samples and 1 Norwegian sample (Tromlingene) were genetically similar to each other and the Danish samples and showed significant genetic differentiation from all other populations. Consequently, it appears that the Pacific oyster populations in Sweden, Denmark and Tromlingene are closely connected and/or share a recent origin. The 2 remaining Norwegian samples (Hui and Espevik) differed from each other and all other populations, but showed similarities to wild oyster samples from Scandinavia and Ireland, respectively. Overall, the results underline a complex origin of Norwegian oysters, with gene flow from Swedish/Danish populations, as well as other unidentified sources. The apparent connectivity among most of the Scandinavian populations has implications for regional management of this invasive species, and highlights possible scenarios for other marine invasive species with a similar life history.

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Section: Resultsmentioning

confidence: 99%

Origin and route of establishment of the invasive Pacific oyster Crassostrea gigas in Scandinavia

Faust¹,

André²,

Meurling³

et al. 2017

Mar. Ecol. Prog. Ser.

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“…We also used the software divMigrate (Sundqvist, Keenan, Zackrisson, Prodöhl, & Kleinhans, 2016) to detect potential asymmetric gene flow between pairs of populations. For this analysis, the undifferentiated sites from the same island were pooled together.…”

Section: Methodsmentioning

confidence: 99%

Highly contrasted population genetic structures in a host–parasite pair in the Caribbean Sea

Jossart

Ridder

Lessios

et al. 2017

Ecology and Evolution

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Evolution and population genetic structure of marine species across the Caribbean Sea are shaped by two complex factors: the geological history and the present pattern of marine currents. Characterizing and comparing the genetic structures of codistributed species, such as host–parasite associations, allow discriminating the relative importance of environmental factors and life history traits that influenced gene flow and demographic events. Using microsatellite and Cytochrome Oxidase I markers, we investigated if a host–parasite pair (the heart urchin Meoma ventricosa and its parasitic pea crab Dissodactylus primitivus) exhibits comparable population genetic structures in the Caribbean Sea and how the observed patterns match connectivity regions from predictive models and other taxa. Highly contrasting patterns were found: the host showed genetic homogeneity across the whole studied area, whereas the parasite displayed significant differentiation at regional and local scales. The genetic diversity of the parasitic crabs (both in microsatellites and COI) was distributed in two main groups, Panama–Jamaica–St Croix on the one hand, and the South‐Eastern Caribbean on the other. At a smaller geographical scale, Panamanian and Jamaican parasite populations were genetically more similar, while more genetic differentiation was found within the Lesser Antilles. Both species showed a signature of population expansion during the Quaternary. Some results match predictive models or data from previous studies (e.g., the Western‐Eastern dichotomy in the parasite) while others do not (e.g., genetic differentiation within the Lesser Antilles). The sharp dissimilarity of genetic structure of these codistributed species outlines the importance of population expansion events and/or contrasted patterns of gene flow. This might be linked to differences in several life history traits such as fecundity (higher for the host), swimming capacity of larval stages (higher for the parasite), and habitat availability (higher for the host).

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“…Such characteristics are rather informative as they indicate the populations between which genes are exchanged with high intensity locally, but with low intensity outside the populations. The patterns of the population's genetic structure are presented as a single cluster in a network space [63].…”

Section: Fig 2 Cluster Analysis Of Wild (Wld) and Domestic (Dom) Rementioning

confidence: 99%

“…According to L. Sundqvis et al [63], this approach shows graphically integrated network patterns of the gene flow between the populations and estimated the valid difference in the gene flow between the paired samples.…”

Section: Genetic Distances Between the Studied Sub-populations Of Wilmentioning

confidence: 99%

STUDY OF THE ALLELE POOL AND THE DEGREE OF GENETIC INTROGRESSION OF SEMI-DOMESTICATED AND WILD POPULATIONS OF REINDEER (Rangifer tarandus L., 1758) USING MI-CROSATELLITES

Харзинова¹,

Dotsev²,

Крамаренко³

et al. 2016

S-h. biol.

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A b s t r a c tThe coexistance of domestic and wild reindeer populations (Rangifer tarandus L., 1758) -is an important feature of this species. Both forms inhabit in conditions, which remain substantially unchanged for a long time. Due to gene flow between domestic and wild populations we observe a relatively high amount of admixture in the gene pool. Biodiversity characteristics of two most numerous reindeer populations (semi-domesticated Nenets breed and wild population of reindeer inhabiting territories of Nenets Autonomous Okrug (NAO) and Taimyr Autonomous Okrug (TAO) based on the analysis of microsatellites are given and the degree of introgression in these populations is determined. Samples of Nenets breed of domestic rein deer were collected in several farms in NAO and TAO (n = 115, four subpopulations). Samples of wild Taimyr population were collected in the course of field research in different geographic regions of TAO (n = 63, five subpopulations). Genomic DNA was isolated using Nexttec columns («Nexttec Biotechnologie GmbH», Germany). Polymorphism of 9 STR-loci (NVHRT21, NVHRT24, NVHRT76, RT1, RT6, RT7, RT9, RT27, RT30) was determined according to the previously developed technique for DNA analyzer ABI3130xl («Applied Biosystems», US). To estimate the allele pool of each population average number of alleles (Na), the effective number of alleles (Ne) based on the locus, rarified allelic richness (Ar), private allelic richness (PrAr), observed (H o ) and expected (H e ) heterozygosity and inbreeding coefficient (F IS ) were calculated. The degree of genetic differentiation of populations was assessed using pairwise F ST values and Nei's genetic distances. We calculated the degree of migration of genes between populations based on microsatellite allele frequencies. Distribution of genetic variation between and within populations was studied by analysis of molecular variance (AMOVA). It was found that the wild population of reindeer is characterized by a higher level of genetic diversity: the average number of alleles per locus was 10.00±0.78 vs. 8.44±0.80, the observed heterozygosity -0.633±0.060 vs. 0.589±0.049. STRUCTURE analysis revealed the formation of two independent clusters corresponding to the wild and domestic populations with high values of the membership coefficient in own clusters: Q WLD = 0.940±0.013 and Q DOM = 0.938±0.010. However, a few individuals (4.4-4.8 %) carrying a mixed genetic origin were found. The degree of introgression between the populations was around 6 %. Cluster analysis of genetic structure performed separately for wild and domestic populations at the level of subpopulations for the number of cluster k ranged from 2 to 5 did not reveal a clear clustering between subpopulation. It's confirmed the homogeneity of genetic structure within populations. Examination of overall genetic diversity with AMOVA procedure indicated that most of the variation was observed within populations (95.4 %, p < 0.001). Principal component analysis (PCA) revealed clear differentiation of the s...

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Directional genetic differentiation and relative migration

Cited by 252 publications

References 48 publications

Origin and route of establishment of the invasive Pacific oyster Crassostrea gigas in Scandinavia

Origin and route of establishment of the invasive Pacific oyster Crassostrea gigas in Scandinavia

Highly contrasted population genetic structures in a host–parasite pair in the Caribbean Sea

STUDY OF THE ALLELE POOL AND THE DEGREE OF GENETIC INTROGRESSION OF SEMI-DOMESTICATED AND WILD POPULATIONS OF REINDEER (Rangifer tarandus L., 1758) USING MI-CROSATELLITES

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