scholarly journals Recent range expansion and agricultural landscape heterogeneity have only minimal effect on the spatial genetic structure of the plant pathogenic fungus Mycosphaerella fijiensis

Heredity ◽  
2012 ◽  
Vol 110 (1) ◽  
pp. 29-38 ◽  
Author(s):  
A Rieux ◽  
L De Lapeyre De Bellaire ◽  
M-F Zapater ◽  
V Ravigne ◽  
J Carlier
Keyword(s):  
Genetic Structure ◽  
Range Expansion ◽  
Agricultural Landscape ◽  
Landscape Heterogeneity ◽  
Spatial Genetic Structure ◽  
Pathogenic Fungus ◽  
Minimal Effect ◽  
Mycosphaerella Fijiensis ◽  
Plant Pathogenic Fungus

scholarly journals The genetic structure of the plant pathogenic fungus Melampsora larici-populina on its wild host is extensively impacted by host domestication

2011 ◽  
Vol 20 (13) ◽  
pp. 2739-2755 ◽  
Author(s):  
C. XHAARD ◽  
B. FABRE ◽  
A. ANDRIEUX ◽  
P. GLADIEUX ◽  
B. BARRÈS ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Pathogenic Fungus ◽  
Plant Pathogenic Fungus ◽  
Wild Host

scholarly journals Strong spatial genetic structure in a Baltic Sea herbivore due to recent range expansion, multiple bottlenecks and low connectivity

2019 ◽  
Author(s):  
Pierre De Wit ◽  
Per R. Jonsson ◽  
Ricardo T. Pereyra ◽  
Marina Panova ◽  
Carl André ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Baltic Sea ◽  
Range Expansion ◽  
Population Genetic ◽  
Spatial Genetic Structure ◽  
Snp Markers ◽  
Connectivity Matrix ◽  
The Baltic Sea ◽  
Low Diversity ◽  
The Baltic

AbstractIn the Baltic Sea, recent range expansions following the opening of the Danish straits have resulted in a low-diversity ecosystem, both among and within species. However, relatively little is known about population genetic patterns within the basin, except for in a few commercially caught species and some primary producers thought to be ecosystem engineers. Here, we investigate the population genetic structure of the ecologically important crustaceanIdotea balthicathroughout the Baltic Sea using an array of 33,774 genome-wide SNP markers derived from 2b-RAD sequencing. We also generate a biophysical connectivity matrix, with which we compare the genomic data. We find strong population structure on small scales across the Baltic Sea, and that genomic patterns in most cases closely match biophysical connectivity, suggesting that current patterns are important for dispersal of this species. We also find a strong signal of multiple bottlenecks during the initial range expansion, in the form of reduced heterozygosity along the historical expansion front. The lack of gene flow among sampling sites in the Baltic Sea environmental gradient potentiates local adaptation, while at the same time also increasing genetic drift in low-diversity areas.

scholarly journals Persistent phylogeographic structure of an emerging virus on a homogeneous landscape

2018 ◽  
Author(s):  
Trieste Musial ◽  
Scott Duke-Sylvester ◽  
Rolan Davis ◽  
Roman Biek ◽  
Leslie A. Real
Keyword(s):  
Genetic Structure ◽  
Rabies Virus ◽  
Animal Movement ◽  
Landscape Heterogeneity ◽  
Spatial Genetic Structure ◽  
Molecular Data ◽  
Landscape Composition ◽  
Early Years ◽  
Phylogeographic Structure ◽  
Pathogen Populations

Landscape composition and structure influence animal movement, which in turn can affect transmission of their diseases. Spatio-temporal variation in host diffusion, caused by landscape heterogeneity, is thus expected to generate corresponding phylogeographic patterns in the pathogen. However, establishing causative links between genetic structure in pathogen populations and environmental variation does require appropriate null models. Here, we present an empirical example of the emergence and multi-decade persistence of phylogeographic structure on a homogeneous landscape in a rapidly diversifying pathogen in the absence of any apparent landscape heterogeneity. By applying phylogeographic inference to 173 sequences of a raccoon-specific strain of rabies virus, we reconstruct patterns of the virus’ evolution and diffusion on the Florida peninsula, USA, from its first emergence in the 1940’s to the present. Consistent with a lack of significant landscape heterogeneity relevant to raccoon movement in Florida, we found that the speed of rabies virus diffusion was spatially homogeneous across the peninsula. In contrast, we document the emergence of strong phylogeographic structure in the virus, in the form of five monophyletic lineages that diverged during the early years of colonization and now each occupy a distinct sub-region of Florida. Based on samples taken over multiple decades, we show that the spatial distribution of these lineages has changed little over the past four decades. This phylogeographic stability allowed us to retrospectively identify a small set of counties within Florida as the likely source of the virus strain that seeded a much larger rabies outbreak in the northeastern USA in the 1970s. Our results provide a rare empirical demonstration that spatial genetic structure can arise and be maintained in the absence of landscape heterogeneity, which has wider implications for the interpretation of phylogeographic data and the reconstruction of historical colonization patterns from molecular data.

Genetic discontinuities and disequilibria in recently established populations of the plant pathogenic fungus Mycosphaerella fijiensis

2010 ◽  
Vol 19 (18) ◽  
pp. 3909-3923 ◽  
Author(s):  
F. HALKETT ◽  
D. COSTE ◽  
G. G. RIVAS PLATERO ◽  
M. F. ZAPATER ◽  
C. ABADIE ◽  
...  
Keyword(s):  
Pathogenic Fungus ◽  
Mycosphaerella Fijiensis ◽  
Plant Pathogenic Fungus

Postglacial range expansion shaped the spatial genetic structure in a marine habitat-forming species: Implications for conservation plans in the Eastern Adriatic Sea

2018 ◽  
Vol 45 (12) ◽  
pp. 2645-2657 ◽  
Author(s):  
Jean-Baptiste Ledoux ◽  
Maša Frleta-Valić ◽  
Silvija Kipson ◽  
Agostinho Antunes ◽  
Emma Cebrian ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Range Expansion ◽  
Adriatic Sea ◽  
Spatial Genetic Structure ◽  
Marine Habitat ◽  
Conservation Plans

scholarly journals Persistent phylogeographic structure of an emerging virus on a homogeneous landscape

2018 ◽  
Author(s):  
Trieste Musial ◽  
Scott Duke-Sylvester ◽  
Rolan Davis ◽  
Roman Biek ◽  
Leslie A. Real
Keyword(s):  
Genetic Structure ◽  
Rabies Virus ◽  
Animal Movement ◽  
Landscape Heterogeneity ◽  
Spatial Genetic Structure ◽  
Molecular Data ◽  
Landscape Composition ◽  
Early Years ◽  
Phylogeographic Structure ◽  
Pathogen Populations

Landscape composition and structure influence animal movement, which in turn can affect transmission of their diseases. Spatio-temporal variation in host diffusion, caused by landscape heterogeneity, is thus expected to generate corresponding phylogeographic patterns in the pathogen. However, establishing causative links between genetic structure in pathogen populations and environmental variation does require appropriate null models. Here, we present an empirical example of the emergence and multi-decade persistence of phylogeographic structure on a homogeneous landscape in a rapidly diversifying pathogen in the absence of any apparent landscape heterogeneity. By applying phylogeographic inference to 173 sequences of a raccoon-specific strain of rabies virus, we reconstruct patterns of the virus’ evolution and diffusion on the Florida peninsula, USA, from its first emergence in the 1940’s to the present. Consistent with a lack of significant landscape heterogeneity relevant to raccoon movement in Florida, we found that the speed of rabies virus diffusion was spatially homogeneous across the peninsula. In contrast, we document the emergence of strong phylogeographic structure in the virus, in the form of five monophyletic lineages that diverged during the early years of colonization and now each occupy a distinct sub-region of Florida. Based on samples taken over multiple decades, we show that the spatial distribution of these lineages has changed little over the past four decades. This phylogeographic stability allowed us to retrospectively identify a small set of counties within Florida as the likely source of the virus strain that seeded a much larger rabies outbreak in the northeastern USA in the 1970s. Our results provide a rare empirical demonstration that spatial genetic structure can arise and be maintained in the absence of landscape heterogeneity, which has wider implications for the interpretation of phylogeographic data and the reconstruction of historical colonization patterns from molecular data.

scholarly journals Fine‐scale spatial genetic structure of common and declining bumble bees across an agricultural landscape

2014 ◽  
Vol 23 (14) ◽  
pp. 3384-3395 ◽  
Author(s):  
Stephanie Dreier ◽  
John W. Redhead ◽  
Ian A. Warren ◽  
Andrew F. G. Bourke ◽  
Matthew S. Heard ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Agricultural Landscape ◽  
Spatial Genetic Structure ◽  
Bumble Bees ◽  
Fine Scale
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