A5063050333- Chromosomal and Genetic Variations
- Plant Taxonomy and Phylogenetics
- Plant Disease Resistance and Genetics
- Plant responses to water stress
- Plant Reproductive Biology
- Coastal wetland ecosystem dynamics
- Plant and animal studies
- Genomics and Phylogenetic Studies
- Genetic diversity and population structure
- Garlic and Onion Studies
- Plant Pathogens and Resistance
- Plant tissue culture and regeneration
- Plant Molecular Biology Research
- Botanical Research and Chemistry
- Plant Parasitism and Resistance
- Mediterranean and Iberian flora and fauna
- Genetic Mapping and Diversity in Plants and Animals
- Microbial Community Ecology and Physiology
- Biological Control of Invasive Species
- Plant and Fungal Species Descriptions
- Marine and coastal plant biology
- Legume Nitrogen Fixing Symbiosis
- Plant Pathogens and Fungal Diseases
- Rice Cultivation and Yield Improvement
- Evolution and Genetic Dynamics
Université de Rennes
2015-2025
Ecosystèmes, Biodiversité, Evolution
2015-2025
Centre National de la Recherche Scientifique
2013-2025
Université Européenne de Bretagne
2014
Observatoire des Sciences de l'Environnement de Rennes
2014
Ecology and Ecosystem Health
2009
University of Alberta
1997
Abstract To study the consequences of hybridization and genome duplication on polyploid evolution adaptation, we used independently formed hybrids ( Spartina × townsendii neyrautii ) that originated from natural crosses between alterniflora , an American introduced species, European native maritima . The hybrid England, S. gave rise to invasive allopolyploid, salt‐marsh anglica Recent studies indicated allopolyploid speciation may be associated with rapid genetic epigenetic changes. assess...
Summary Hybridization and polyploidy are well illustrated in the genus Spartina . This paper examines how recent molecular approaches have helped our understanding of past reticulate history species, with special focus on allopolyploid speciation. species tetraploid, hexaploid or dodecaploid perennials, most them being native to New World. The phylogeny indicates an ancient split between tetraploid S argentinensis as sister lineage. Recent hybridization polyploidization events involved...
*Transposable elements (TE) induce structural and epigenetic alterations in their host genome, with major evolutionary implications. These are examined here the context of allopolyploid speciation, on recently formed invasive species Spartina anglica, which represents an excellent model to contrast plant genome dynamics following hybridization doubling natural conditions. *Methyl-sensitive transposon display was used investigate TE insertion sites for several elements, it comparable...
Spartina anglica arose during the end of 19th century in England by hybridization between indigenous maritima and introduced East American alterniflora following genome duplication hybrid (S. × townsendii). This system allows investigations early evolutionary changes that accompany stabilization a new allopolyploid species natural populations. Various molecular data indicate S. has resulted from unique parental genotype. young contains two distinctly divergent homoeologous genomes have not...
Allopolyploidy results from two events: the merger of divergent genomes and genome duplication. Both events have important functional consequences for evolution adaptation newly formed allopolyploid species. In spite significant progress made in recent years, few studies decoupled effects hybridization duplication observed patterns expression changes accompanying allopolyploidy natural conditions. We used Agilent rice oligomicroarrays to explore gene following Spartina that includes a...
To date chloroplast genomes are available only for members of the non-protein amino acid-accumulating clade (NPAAA) Papilionoid lineages in legume family (i.e. Millettioids, Robinoids and 'inverted repeat-lacking clade', IRLC). It is thus very important to sequence plastomes from other order better understand unusual evolution observed this model flowering plant family. end, plastome a lupine species, Lupinus luteus, was sequenced represent Genistoid lineage, noteworthy but poorly studied...
Spartina × townsendii arose during the end of 19th century in England by hybridization between indigenous maritima and introduced alterniflora, native to eastern seaboard North America. Duplication hybrid genome gave rise anglica, a vigorous allopolyploid involved natural artificial invasions on several continents. This system allows investigation early evolutionary changes that accompany stabilization new species. Because allopolyploidy may be genomic shock, eliciting retroelement...
Abstract Spartina anglica is a classical example of recent alloploid speciation. It arose during the end nineteenth century in England by hybridization between indigenous maritima and introduced East‐American alterniflora . Duplication hybrid genome ( × townsendii ) gave rise to vigorous allopolyploid involved natural artificial invasions on different continents. was first recorded France 1906, since then, it has spread all along western French coast. Earlier studies revealed that native...
Invasive alien species are a primary driver of biodiversity loss and extinction. Smooth cordgrass (Spartina alterniflora) is one the most aggressive invasive plants in coastal ecosystems around world. However, genomic bases evolutionary mechanisms underlying invasion success this remained largely unknown. Here we assembled chromosome-level reference genome performed phenotypic population analysis between native US introduced Chinese populations. Our comparisons showed that populations...
One little understood feature of polyploid speciation is the transition from polysomic to disomic inheritance, and much recent attention has focused on role pairing genes in this process. Using computer simulations we studied effects mutations, chromosomal inversions, chiasma, neofunctionalization, subfunctionalization selection evolution inheritance a over 10 000 generations. We show that: not essential for establishment as genetic drift, coupled with threshold homologue fidelity,...
In 2014, a DNA-based phylogenetic study confirming the paraphyly of grass subtribe Sporobolinae proposed creation large monophyletic genus Sporobolus, including (among others) species previously included in genera Spartina, Calamovilfa, and Sporobolus. Spartina have contributed substantially (and continue contributing) to our knowledge multiple disciplines, ecology, evolutionary biology, molecular biogeography, experimental biological invasions, environmental management, restoration history,...
Plant history is characterized by cyclical whole genome duplication and diploidization with important biological ecological consequences. Here, we explore the of two related iconic polyploid grasses (Sporobolus alterniflorus S. maritimus), involved in a well-known example neopolyploid speciation. We report particular dynamics where an ancestral Sporobolus (n = 2x 20) duplicated 9.6-24.4 million years ago (MYA), which was followed descending dysploidy resulting unexpected base chromosome...
ABSTRACT Whole genome duplication (WGD or polyploidization) events shape plant evolution, altering ecological responses and traits, particularly those related to cell tissue size. We studied genetic diversity phenotypic plasticity in Spartina populations, focusing on hybrid ( × townsendii ) allopolyploid S. anglica cytotypes Wadden Sea salt marshes. Our results reveal low both a complex response of traits global change factors (drought, elevated CO 2 concentration). While WGD increased...
The internal transcribed spacer (ITS) region of nuclear ribosomal DNA from 22 diploid and tetraploid annual Bromus species section (Poaceae) three belonging to other sections, catharticus (section Ceratochloa), anomalus Pnigma), sterilis Genea), were investigated by PCR amplification direct sequencing. length the ITS-1 varied 215 218 bp, that ITS-2 216 in analyzed. was more variable provided informative sites (49) than (32). No variation encountered within species. In pairwise comparison...
The origin of polyploid Bromus species section Genea was investigated using molecular data. This group annual native from the Old-World is composed three diploids, two tetraploids, one hexaploid, and octoploid. Molecular cloning, sequencing, phylogenetic analyses were performed on several accessions per species. We used low copy nuclear gene Waxy, repeated rDNA spacers ITS1 ITS2 chloroplast trnT-trnL trnL-trnF. Our revealed four different lineages involved in parentage polyploids confirmed...
Polyploidy (whole-genome duplication) has played a pervasive role in the evolution of fungi and animals, is particularly prominent plants (Wendel & Doyle, 2005; Cui et al., 2006; Otto, 2007; Wood 2009). This important evolutionary phenomenon attracted renewed growing interest from scientific community last decade since it was discovered that even smallest plant genomes considered to be 'diploid' (e.g. Arabidopsis thaliana, reviewed Henry 2006) have incurred at least one round whole-genome...