Genetic variation within the arctic-alpine Calamagrostis stricta (Poaceae) species complex in Europe DOI Creative Commons
Luca Champoud, Sandra Grünig, Adrian Metry

et al.

Plant Systematics and Evolution, Journal Year: 2024, Volume and Issue: 311(1)

Published: Dec. 4, 2024

Abstract The Calamagrostis stricta (Poaceae) species complex is a circumpolar, boreo-arctic and montane taxon that includes numerous subspecies varieties. recent discovery of lonana in the Alps calls for thorough assessment relationships within C. . main aim our study was to elucidate phylogenetic position, genetic structure ploidy level , as compared other members from Central Europe Arctic. Fifteen populations were sampled across Northern Europe, their estimated using flow cytometry. Genetic variation characterized double digest RAD sequencing reads (ddRAD-seq) on total 115 individuals genotyped at 1157 single-nucleotide polymorphisms. Based cytometric measurements, tetraploidy observed Arctic Alps, contrast exhibiting higher levels. genetically closely related arctic subsp. groenlandica while formed second cluster Europe. A third, very distinct northern Svalbard archipelago. Despite lacking evidence sexual reproduction, substantially more diversity than expected under asexual reproduction detected taxa. distribution has been shaped by major post-glacial environmental changes having affected cold regions specifically highlights valuable relict

Language: Английский

Ice age‐driven range shifts of diploids and expanding autotetraploids of Biscutella laevigata within a conserved niche DOI Creative Commons
Sandra Grünig, Theofania Patsiou, Christian Parisod

et al.

New Phytologist, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Summary Early studies of the textbook mixed‐ploidy system Biscutella laevigata highlighted diploids restricted to never‐glaciated lowlands and tetraploids at high elevations across European Alps, promoting hypothesis that whole‐genome duplication (WGD) is advantageous under environmental changes. Here we addressed long‐held hypotheses on role hybridisation origin tetraploids, their single vs multiple origins, whether a shift in climatic niche accompanied WGD. Climatic modelling together with spatial genetics coalescent based ddRAD‐seq genotyping 17 diploid 19 tetraploid populations was used revisit evolution this species complex space time. Diploids differentiated into four genetic lineages corresponding allopatric glacial refugia onset last ice age, whereas displaying tetrasomic inheritance formed uniform group originated from southern before maximum. Derived occurring elevation, autotetraploids likely inherited adaptation elevation rather than having evolved it through or after They further presented considerable postglacial expansion Alps underwent admixture diploids. Although underpinnings successful remain elusive, differentiation B. chiefly driven by history Alps.

Language: Английский

Citations

2
Genetic variation within the arctic-alpine Calamagrostis stricta (Poaceae) species complex in Europe DOI Creative Commons
Christian Parisod,

Sandra Gruenig,

Adrian Metry

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: June 13, 2024

Abstract The Calamagrostis stricta (Poaceae) species complex is a circumpolar, boreo-arctic and montane taxon that includesnumerous subspecies varieties. recent discovery of lonana Eggenberg & Leibundgut in the Alps, calls for thorough assessment relationships within C. stricta. main aim our study was to elucidate phylogenetic position, genetic structure, ploidy level lonana, as compared other members from Central Europe Arctic. Fifteen populations stricta species were sampled across Northern their estimated using flow cytometry. Genetic variation characterized double digest RAD sequencing reads (ddRADseq) on total 115 individuals genotyped at 1157 single nucleotide polymorphisms. Tetraploidy observed Arctic contrast exhibiting higher levels. genetically closely related arctic subsp. groenlandica, while subsp. stricta formed second cluster Europe. A third, very distinct northern Svalbard archipelago. Despite lacking evidence sexual reproduction, substantially more diversity than expected under asexual reproduction detected taxa. The distribution structure has been shaped by major post-glacial environmental changes having affected cold regions, specifically highlights lonana as valuable relict Alps.

Language: Английский

Citations

0
Genetic variation within the arctic-alpine Calamagrostis stricta (Poaceae) species complex in Europe DOI Creative Commons
Luca Champoud, Sandra Grünig, Adrian Metry

et al.

Plant Systematics and Evolution, Journal Year: 2024, Volume and Issue: 311(1)

Published: Dec. 4, 2024

Abstract The Calamagrostis stricta (Poaceae) species complex is a circumpolar, boreo-arctic and montane taxon that includes numerous subspecies varieties. recent discovery of lonana in the Alps calls for thorough assessment relationships within C. . main aim our study was to elucidate phylogenetic position, genetic structure ploidy level , as compared other members from Central Europe Arctic. Fifteen populations were sampled across Northern Europe, their estimated using flow cytometry. Genetic variation characterized double digest RAD sequencing reads (ddRAD-seq) on total 115 individuals genotyped at 1157 single-nucleotide polymorphisms. Based cytometric measurements, tetraploidy observed Arctic Alps, contrast exhibiting higher levels. genetically closely related arctic subsp. groenlandica while formed second cluster Europe. A third, very distinct northern Svalbard archipelago. Despite lacking evidence sexual reproduction, substantially more diversity than expected under asexual reproduction detected taxa. distribution has been shaped by major post-glacial environmental changes having affected cold regions specifically highlights valuable relict

Language: Английский

Citations

0