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31 results for “clonal structure”
Data from: Mating system and genetic structure across all known populations of Dyckia brevifolia: a clonal, endemic and endangered rheophyte bromeliad
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Data from: Clonal structure through space and time: high stability in the holothurian Stichopus chloronotus (Echinodermata)
Sea cucumbers are increasingly exploited for human consumption and for their curative properties, and many wild populations are now depleted or in danger of extinction. While aquaculture is seen as an alternative to fisheries and as a mean to restore wild populations, more knowledge is needed on their reproductive strategies to render this practice efficient, notably for fissiparous holothurians, which are some of the mobile animals able of asexual reproduction by transverse fission. Little information is available on their population genetic diversity and structure. Here, the clonal structure of populations of the fissiparous sea cucumber Stichopus chloronotus has been investigated using nine microsatellite loci and a random sampling, at different spatial (intra-reef and inter-reef) and temporal (inter-season and inter-year) scales. Our findings highlight the importance of asexual reproduction in maintaining these populations, and the prevalence of the "initial seedling recruitment" strategy (ISR), leading to a high stability of clonal composition over seasons and years. It also seemed that clonal propagation was limited to the reef scale (<10 km) while reefs were connected by sexual dispersal. This is the first time that clonal structure in sea cucumbers has been studied at such a fine scale, with a specific sampling strategy. It provides key findings on the genetic diversity and structure of fissiparous sea cucumbers, which will be useful for the management of wild populations and aquaculture.
Data from: Clonal genetic structure and diversity in populations of an aquatic plant with combined versus separate sexes
Clonality is often implicated in models of the evolution of dioecy, but few studies have explicitly compared clonal structure between plant sexual systems, or between the sexes in dioecious populations. Here, we exploit the occurrence of monoecy and dioecy in clonal Sagittaria latifola (Alismataceae) to evaluate two main hypotheses: (1) clone sizes are smaller in monoecious than dioecious populations, because of constraints imposed on clone size by costs associated with geitonogamy; (2) in dioecious populations, male clones are larger and flower more often than female clones because of sex-differential reproductive costs. Differences in clone size and flowering could result in discordance between ramet- and genet-based sex ratios. We used spatially explicit sampling to address these hypotheses in 10 monoecious and 11 dioecious populations of S. latifolia at the northern range limit in eastern N. America. In contrast to our predictions, monoecious clones were significantly larger than dioecious clones, probably due to their higher rates of vegetative growth and corm production, and in dioecious populations there was no difference in clone size between females and males; ramet- and genet-based sex ratios were therefore highly correlated. Genotypic diversity declined with latitude for both sexual systems, but monoecious populations exhibited lower genotypic richness. Differences in life history between the sexual systems of S. latifolia appear to be the most important determinants of clonal structure and diversity.
Data from: The making of winners (and losers): how early dominance interactions determine adult social structure in a clonal fish
Across a wide range of animal taxa, winners of previous fights are more likely to keep winning future contests, just as losers are more likely to keep losing. At present, such winner and loser effects are considered to be fairly transient. However, repeated experiences with winning and/or losing might increase the persistence of these effects generating long-lasting consequences for social structure. To test this, we exposed genetically identical individuals of a clonal fish, the Amazon molly (Poecilia formosa), to repeated winning and/or losing dominance interactions during the first two months of their life. We subsequently investigated whether these experiences affected the fish's ability to achieve dominance in a hierarchy five months later during adulthood. Individuals that had only winning interactions early in life consistently ranked at the top of the hierarchy. Interestingly, individuals with only losing experience tended to achieve the middle dominance rank, whereas individuals with both winning and losing experiences generally ended up at the bottom of the hierarchy. In addition to demonstrating that early social interactions can have dramatic and long-lasting consequences for adult social behaviour and social structure, our work also shows that higher cumulative winning experience early in life can counter-intuitively give rise to lower social rank later in life.
Data from: Clonal genetic structure and diversity in populations of an aquatic plant with combined versus separate sexes
Open the record for dataset details and reuse information.
Data from: Clonal structure through space and time: high stability in the holothurian Stichopus chloronotus (Echinodermata)
Open the record for dataset details and reuse information.
Data from: The making of winners (and losers): how early dominance interactions determine adult social structure in a clonal fish
Open the record for dataset details and reuse information.
Clonal structure and dynamics of human memory B cells and circulating plasmablasts
GEO Series GSE188681. Homo sapiens. 8 samples. Type: Expression profiling by high throughput sequencing.
Clinical progression of clonal hematopoiesis is determined by a combination of mutation timing, clonal fitness, and structure
GEO Series GSE288742. Homo sapiens. 192 samples. Type: Other.
Fig. 7 in Clonal Structure Of Some Weevil Species (Coleoptera, Curculionidae) From Central Ukraine
Fig. 7. Polyclonal structure of studied weevil species in Central Ukraine.
Clonality and genetic structure of an endangered aquatic plant, Typha minima, in the French Alps: consequences for conservation
<p>Genetic data on Typha minima populations obtained with AFLP markers.</p> <p>The data was used in the article "Clonality and genetic structure of an endangered aquatic plant, Typha minima, in the French Alps: consequences for conservation, by Irène Till-Bottraud, Jacky Girel, Erwan Roussel, Delphine Rioux, Lucie Fiorese, Noémie Fort and published in Alpine Botany in 2022</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.