Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
86
datasets available to search
ShareScore release 0.9.0
Dataset results
86 results for “polyploidy”
Data from: Conservation of the threatened species Pulsatilla vulgaris Mill. (pasqueflower) is aided by reproductive system and polyploidy
Population loss due to habitat disturbance is a major concern in biodiversity conservation. Here we investigate the genetic causes of the demographic decline observed in English populations of Pulsatilla vulgaris and the consequences for conservation. Using ten nuclear microsatellite markers, we compare genetic variation in wild populations with restored and seed-regenerated populations (674 samples). Emergence of genetic structure and loss of allelic variation in natural populations is not as evident as expected from demographic trends. Restored populations show genetic variation comparable to their source populations and, in general, to the wild ones. Genetic homogeneity is observed in regeneration trials, although some alleles not captured in source populations are detected. We infer that polyploidy, longevity and clonal reproduction have provided P. vulgaris with the standing genetic variation necessary to make the species resilient to the effects of demographic decline, suggesting that the use of multiple sources for reintroduction may be beneficial to mimic natural gene flow and the availability of multiple allele copies typical of polyploid species.
Lifespan, clonality and polyploidy regulate the global environmental niches of plants via seed dispersal in space and time
<p>Global environmental niches have been considered in relation to the effectiveness of environmental management. Functional traits can explain the environmental niches of plant species at different spatial scales, from community to globe. However, the roles of seed dispersal in space and time in plant environmental niche and tolerance are not clear. Furthermore, knowledge of the regulation of plants' global environmental niches by lifespan, clonality and polyploidy remains limited. In response, the main objective of the research reported here was to explore how these factors regulate the global environmental niches of plants via seed dispersal in space and time. We obtained data on plant species' seed mass, seed dispersal ability, dormancy, lifespan, clonality and polyploidy from a variety of databases and quantified global environmental niche and tolerance based on the niche axes of climate, soil and elevation. Subsequently, we used phylogenetic generalized least square linear regression and structural equation models to assess the relationships of seed traits (i.e. seed mass, seed dispersal distance and dormancy), lifespan, clonality and polyploidy with environmental niches. We found significant relationships between seed mass, seed dispersal distance, dormancy, lifespan, clonality and polyploidy on the one hand and environmental niche and tolerance on the other, based on the axes of climate, soil and elevation. Compared with lifespan, ploidy and clonality, seed traits explained more variations in environmental niches and tolerance for plants. Importantly, we built pathways indicating that lifespan, clonality and polyploidy regulate the global environmental niche and tolerance of plants via seed mass and/or seed dispersal in space and time. Our study clearly highlights the mechanisms underlying environmental niches from different perspectives, including seed temporal-spatial dispersal, lifespan, clonality and polyploidy. Environmental niche theory may broadly support global-change-adaptation management for biodiversity conservation and ecosystem maintenance using the perspective of spatial and temporal patterns in ecology.</p>
Data from: Multiple polyploidy events in the early radiation of nodulating and non-nodulating legumes
Unresolved questions about evolution of the large and diverse legume family include the timing of polyploidy (whole-genome duplication; WGDs) relative to the origin of the major lineages within the Fabaceae and to the origin of symbiotic nitrogen fixation. Previous work has established that a WGD affects most lineages in the Papilionoideae and occurred some time after the divergence of the papilionoid and mimosoid clades, but the exact timing has been unknown. The history of WGD has also not been established for legume lineages outside the Papilionoideae. We investigated the presence and timing of WGDs in the legumes by querying thousands of phylogenetic trees constructed from transcriptome and genome data from 20 diverse legumes and 17 outgroup species. The timing of duplications in the gene trees indicates that the papilionoid WGD occurred in the common ancestor of all papilionoids. The earliest diverging lineages of the Papilionoideae include both nodulating taxa such as the genistoids (e.g. lupin), dalbergioids (e.g. peanut), phaseoloids (e.g. beans), and galegoids (= Hologalegina, e.g. clovers), and clades with non-nodulating taxa including Xanthocercis and Cladrastis (evaluated in this study). We also found evidence for several independent WGDs near the base of other major legume lineages, including the Mimosoid-Cassiinae-Caesalpinieae (MCC), Detarieae, and Cercideae clades. Nodulation is found in the MCC and papilionoid clades, both of which experienced ancestral WGDs. However, there are numerous non-nodulating lineages in both clades, making it unclear whether the phylogenetic distribution of nodulation is due to independent gains or a single origin followed by multiple losses.
Polyploidy and Mutation in Arabidopsis
<p class="western">The effects of genetic mutations are influenced by genome structure. Polyploids have more gene or allele copies than diploids, which results in higher tolerance of recessive deleterious mutations. However, this benefit may differ between autopolyploids and allopolyploids and between neopolyploids and older polyploid lineages due to the effects of hybridization and diploidization, respectively. To isolate these effects, we measured the impacts of controlled mutagenesis on reproductive fitness traits in closely related <i>Arabidopsis</i> diploids (<i>A. thaliana</i>), autotetraploids (<i>A. thaliana</i>), and allotetraploids<i> </i>(<i>A. suecica</i>), including both synthetic and natural polyploid lines. Overall, mutagenesis had the largest negative impacts on seed production, while its impacts on germination and survival were negligible. As expected, these effects were much stronger in diploids than in polyploids. The differences between autopolyploids, allopolyploids, and polyploids of different ages were minor—cumulative reproductive fitness did not significantly differ between the treatment and control groups for any polyploid line type. These results suggest that hybridization and polyploid age have not impacted the genomic redundancy of <i>Arabidopsis</i> polyploids enough to significantly alter their aggregate response to mutation, although this effect may differ in older polyploid lineages or in allopolyploids with different levels of divergence between parental subgenomes.</p>
Lifespan, clonality and polyploidy regulate the global environmental niches of plants via seed dispersal in space and time
Open the record for dataset details and reuse information.
The influence of experimentally induced polyploidy on the relationships between endopolyploidy and plant function in Arabidopsis thaliana
Open the record for dataset details and reuse information.
Data from: Historical biogeography of the fern genus Deparia (Athyriaceae) and its relation with polyploidy
Open the record for dataset details and reuse information.
Data from: Comparative linkage maps suggest that fission, not polyploidy, underlies near-doubling of chromosome number within monkeyflowers (Mimulus; Phrymaceae)
Open the record for dataset details and reuse information.
Data from: Comparative analysis reveals that polyploidy does not decelerate diversification in fish
Open the record for dataset details and reuse information.
Data from: Whole genome duplication in coast redwood (Sequoia sempervirens) and its implications for explaining the rarity of polyploidy in conifers
Open the record for dataset details and reuse information.
Data from: Ancestral polyploidy in seed plants and angiosperms
Open the record for dataset details and reuse information.
Polyploidy and Mutation in Arabidopsis
Open the record for dataset details and reuse information.
Data from: Multiple polyploidy events in the early radiation of nodulating and non-nodulating legumes
Open the record for dataset details and reuse information.
Data from: Polyploidy and microsatellite variation in the relict tree Prunus lusitanica L.: how effective are refugia in preserving genotypic diversity of clonal taxa?
Open the record for dataset details and reuse information.
Data from: Gene-tree reconciliation with MUL-trees to resolve polyploidy events
Open the record for dataset details and reuse information.
Data from: Conservation of the threatened species Pulsatilla vulgaris Mill. (pasqueflower) is aided by reproductive system and polyploidy
Open the record for dataset details and reuse information.
Polyploidy-promoted phenolic metabolism confers the increased competitive ability of Solidago canadensis
Open the record for dataset details and reuse information.
Polyploidy can drive rapid adaptation in yeast
GEO Series GSE51017. Saccharomyces cerevisiae. 67 samples. Type: Genome variation profiling by genome tiling array.
c-Myc supports polyploidy and prevents senescence in the murine placenta
GEO Series GSE215382. Mus musculus. 12 samples. Type: Expression profiling by high throughput sequencing.
BLM deficiency affects cytotoxicity of temozolomide and olaparib against human glioma cells and induces cellular senescence or polyploidy
GEO Series GSE214931. Homo sapiens. 18 samples. Type: Expression profiling by high throughput sequencing.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.