1,721,178 research outputs found
Struttura genetica di popolazione di alexandrium minutum (dinoflagellata) in Mar Mediterraneo: Un caso di studio
Full text linkStudio di genetica di popolazione di Alexandrium minutum (Dinophyceae) nel Mar Mediterraneo
No full textApplicazione di marcatori molecolari polimorfici per studi di genetica di popolazione su Alexandrium minutum nel Mar Mediterraneo
No full textNo genetic signature of glacial refugia in current European fallow deer (Dama dama dama L., 1758) populations: a comment on Baker et al. (2017)
No full textGenetic data are crucial for making inferences about the evolutionary history of species and deriving guidelines for conservation strategies. In conservation genetics studies, each step should be critically evaluated, from sampling strategy to data quality assessment and analytical methods: potential issues and biases should be considered, reproducibility should be guaranteed and the results of different analyses should be critically evaluated. By incorporating all these steps, we re-analysed data from Baker et al. (Heredity 119:16–26, 2017): our results led to conclusions that contradict the ones reached by the authors, which were based on weak support and biased analyses. European fallow deer current genetic makeup most likely derives from extensive human-mediated translocations. The genetic expectations of glacial refugia hypothesis cannot be found in current European fallow deer population
Population genetic structure of the toxic Dinophyceae Alexandrium minutum in the Mediterranean Sea: a case study
No full textPresentazione oral
Proposte metodologiche per il recupero del materiale antropologico nello scavo e la sua conservazione nella prospettiva di un’analisi del DNA
No full textThe paper describes methods suggested for conservation and preservation of aDNA retrieved from archaeological excavations
Mitochondrial diversity in linguistic isolates of the Alps: A reappraisal
No full textIn Stenico et al. (1996) we reported unusually high levels of mitochondrial diversity in the Alps. In particular, two communities of Ladin speakers appeared the most extreme European mitochondrial outliers at that time. Recently, it has been observed that some rare nucleotide substitutions occur repeatedly among those sequences, raising the possibility of systematic sequencing errors. No biological material was left from the previous study, and hence we had to sample new individuals from the same communities. Here, we present the HVSI sequence variation, along with haplogroup assignment based on restriction fragment length polymorphism (RFLP), in 20 Ladin speakers of Colle Santa Lucia. None of the new sequences displays substitutions at the sites viewed as problematic. However, Ladins still show high levels of mtDNA diversity, both within their community and with respect to other Europeans, and they can still be considered one of the main European mitochondrial outliers
Genetic structure of the toxic marine protist Alexandrium minutum (dinoflagellate) in the Mediterranean Sea: implications for the control and management of the HAB events.
No full textNew potential expansion of toxic tropical marine micro-organisms in relation to oceanic climate change
No full textMuseum specimens indicate genetic erosion in an endangered lizard
No full textGenetic variability, one of the main factors that guarantees species persistence, and species’ conservation status are generally evaluated with indices calculated at the present time. Natural history collections might help compare historical and current genetic diversity so to identify major trends. Here we analysed museum specimens of the lizard Zootoca vivipara carniolica, with a specific and stringent protocol for degraded DNA, in order to contrast its past and current genetic variability, using fragments of one mitochondrial DNA gene. Part of the distributional range of Z. v. carniolica (Po Plain, Italy), heavily impacted by human activities, was investigated. We found two previously unknown haplotypes in populations that are extinct today, suggesting the loss of these haplotypes and thus an overall shrinking of genetic variability. We argue that these results, together with the increasing threats posed by climate and land use changes, suggest that specific conservation measures for the persistence of Z. v. carniolica in Northern Italian lowlands have to be considere
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