R. Bachmann results 36
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Recurrent allopolyploidizations diversify ecophysiological traits in marsh orchids ( Dactylorhiza majalis s.l.)NARA Subscribed
Whole‐genome duplication has shaped the evolution of angiosperms and other organisms, and is important for many crops. Structural reorganization of chromosomes and repatterning of gene expression are frequently observed in allopolyploids, with physiological and ecological consequences. Recurrent origins from different parental populations are widespread among polyploids, resulting in an array of lineages that provide excellent...
Shape from spectraNARA Subscribed
Global warming is affecting the population dynamics and trophic interactions across a wide range of ecosystems and habitats. Translating these real‐time effects into their long‐term consequences remains a challenge. The rapid and extreme warming period that occurred after the Last Glacial Maximum (LGM) during the Pleistocene–Holocene transition (7–12 thousand years ago) provides an opportunity to gain insights into the long‐te...
Obsidian pyroclasts in the Yellowstone-Snake River Plain ignimbrites are dominantly juvenile in originNARA Subscribed
Dense, glassy pyroclasts found in products of explosive eruptions are commonly employed to investigate volcanic conduit processes through measurement of their volatile inventories. This approach rests upon the tacit assumption that the obsidian clasts are juvenile, that is, genetically related to the erupting magma. Pyroclastic deposits within the Yellowstone-Snake River Plain province almost without exception contain dense, g...
Sea‐level variations have influenced the demographic history of estuarine and freshwater fishes of the coastal plain of Paraná, BrazilNARA Subscribed
This study surveyed the mitochondrial haplotype diversity of nine freshwater fish species and two estuarine–marine species from the coastal basins and drainages of the highland plateaus of Paraná, Brazil. Portions of the cytochrome b gene or the control region were sequenced. The demographic history of each species was inferred using the Bayesian skyline method, mismatch distribution analysis and statistical neutrality tests....
A specimen of the little gulper shark Centrophorus uyato was collected in the Norwegian Sea off the coast of northern Norway, marking the northernmost record of the species in the eastern North Atlantic Ocean. Morphological characteristics collected from the specimen indicate a close relationship to the Australian species Centrophorus zeehaani . DNA barcoding analysis of the mitochondrial cytochrome oxidase subunit I ( coI ) g...
Nunatak survival of the high Alpine plant Eritrichium nanum (L.) Gaudin in the central Alps during the ice agesNARA Subscribed
Polymerase chain reaction–restriction fragment length polymorphisms (PCR‐RFLPs) and sequence analysis of noncoding regions of chloroplast DNA were used to investigate 37 populations of Eritrichium nanum covering its total distribution area, the European Alps. There was no haplotypic variation within the populations, and most haplotypes were restricted to single sites or to neighbouring populations, suggesting low levels of lon...
Highly variable amplified fragment length polymorphism (AFLP) fingerprints of triploid apomictic dandelions obtained from three localities in an area where diploids are lacking were analysed to infer the predominant modes of reproduction. The distribution of markers was analysed using character compatibility to infer whether many genotypes agree with a tree‐like structure in the data set. The presence of incompatible character...