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3,458 results for “Chromosomes”
Figure 4 from: Peruzzi L, Astuti G, Caparelli K, D'Antraccoli M, Roma-Marzio F (2018) Chromosome numbers for the Italian flora: 5. Italian Botanist 5: 101-108. https://doi.org/10.3897/italianbotanist.5.26855
Figure 4 Centaurea poeltiana Ten., 2n = 18. Scale bar: 10 μm.
Figure 3 from: Peruzzi L, Astuti G, Caparelli K, D'Antraccoli M, Roma-Marzio F (2018) Chromosome numbers for the Italian flora: 5. Italian Botanist 5: 101-108. https://doi.org/10.3897/italianbotanist.5.26855
Figure 3 Centaurea ionica Brullo, 2n = 18. Scale bar: 10 μm.
Figure 1 from: Peruzzi L, Astuti G, Caparelli K, D'Antraccoli M, Roma-Marzio F (2018) Chromosome numbers for the Italian flora: 5. Italian Botanist 5: 101-108. https://doi.org/10.3897/italianbotanist.5.26855
Figure 1 Centaurea aspromontana Brullo, Scelsi & Spamp., 2n = 18. Scale bar: 10 μm.
Figure 7 from: Peruzzi L, Astuti G, Caparelli K, D'Antraccoli M, Roma-Marzio F (2018) Chromosome numbers for the Italian flora: 5. Italian Botanist 5: 101-108. https://doi.org/10.3897/italianbotanist.5.26855
Figure 7 Centaurea deusta Ten., 2n = 18. Scale bar: 10 μm.
Figure 3 from: Peruzzi L, Astuti G, Cambria S, Cresti L, Franzoni J, Roma-Marzio F, Spezia M (2018) Chromosome numbers for the Italian flora: 6. Italian Botanist 6: 91-96. https://doi.org/10.3897/italianbotanist.6.30975
Figure 3 EuphorbiagasparriniiBoiss.subsp.gasparrinii, 2n = 32. Scale bar: 10 μm.
Figure 1 from: Peruzzi L, Astuti G, Cambria S, Cresti L, Franzoni J, Roma-Marzio F, Spezia M (2018) Chromosome numbers for the Italian flora: 6. Italian Botanist 6: 91-96. https://doi.org/10.3897/italianbotanist.6.30975
Figure 1 Bupleurumbaldense Turra, 2n = 16. Scale bar: 10 μm.
Figure 2 from: Peruzzi L, Astuti G, Cambria S, Cresti L, Franzoni J, Roma-Marzio F, Spezia M (2018) Chromosome numbers for the Italian flora: 6. Italian Botanist 6: 91-96. https://doi.org/10.3897/italianbotanist.6.30975
Figure 2 Colchicumlusitanum Brot., 2n = 108. Scale bar: 10 μm.
Figure 6 from: Astuti G, Liu L, Peruzzi L (2019) Chromosome numbers for the Italian flora: 7. Italian Botanist 7: 183-187. https://doi.org/10.3897/italianbotanist.7.36004
Figure 6 Pulmonariahirta L. from Favari (Grizzana Morandi, Bologna), 2n = 28. Scale bar: 10 μm.
Figure 4 from: Astuti G, Liu L, Peruzzi L (2019) Chromosome numbers for the Italian flora: 7. Italian Botanist 7: 183-187. https://doi.org/10.3897/italianbotanist.7.36004
Figure 4 Pulmonariahirta L. from Eremo di Camaldoli (Poppi, Arezzo), 2n = 28. Scale bar: 10 μm.
Figure 7 from: Peruzzi L, Chiavegatto RB, D'Antraccoli M, Dolci D, Roma-Marzio F (2017) Chromosome numbers for the Italian flora: 4. Italian Botanist 4: 53-59. https://doi.org/10.3897/italianbotanist.4.21782
Figure 7 - Silene calabra Brullo, Scelsi & Spamp., 2n = 24. Scale bar: 10 μm.
Figure 4 from: Peruzzi L, Chiavegatto RB, D'Antraccoli M, Dolci D, Roma-Marzio F (2017) Chromosome numbers for the Italian flora: 4. Italian Botanist 4: 53-59. https://doi.org/10.3897/italianbotanist.4.21782
Figure 4 - Dianthus brutius Brullo, Scelsi & Spamp. subsp. brutius , 2n = 30. Scale bar: 10 μm.
Figure 3 from: Peruzzi L, Chiavegatto RB, D'Antraccoli M, Dolci D, Roma-Marzio F (2017) Chromosome numbers for the Italian flora: 4. Italian Botanist 4: 53-59. https://doi.org/10.3897/italianbotanist.4.21782
Figure 3 - Polygala flavescens subsp. pisaurensis (Caldesi) Arcang., 2n = 22. Scale bar: 10 μm.
Figure 2 from: Peruzzi L, Chiavegatto RB, D'Antraccoli M, Dolci D, Roma-Marzio F (2017) Chromosome numbers for the Italian flora: 4. Italian Botanist 4: 53-59. https://doi.org/10.3897/italianbotanist.4.21782
Figure 2 - Polygala flavescens subsp. maremmana (Fiori) Arrigoni, 2n = 22. Scale bar: 10 μm.
Figure 1 from: Gokhman VE, Nugnes F, Bernardo U (2019) Chromosomes of Eupristina verticillata Waterston, 1921 and an overview of known karyotypes of chalcid wasps of the family Agaonidae (Hymenoptera). Journal of Hymenoptera Research 71: 157-161. https://doi.org/10.3897/jhr.71.35951
Figure 1 Diploid karyotype of E. verticillata. Scale bar: 10 μm.
Figure 3. C in Comparison of the chromosome banding patterns in three species of social voles (Microtus irani karamani, M. schidlovskii, M. anatolicus) from Turkey
Figure 3. C-banded karyotypes of M. irani karamani (1), M. schidlovskii (2), and M. anatolicus (3).
Detecting shifts in the mode of chromosomal speciation across the cosmopolitan plant lineage Carex
<p>Data and code for the manuscript "Detecting shifts in the mode of chromosomal speciation across the cosmopolitan plant lineage <em>Carex</em>". </p>
Data from: Highly conserved Z and molecularly diverged W chromosomes in the fish genus Triportheus (Characiformes, Triportheidae)
The main objectives of this study were to test: (1) whether the W-chromosome differentiation matches to species' evolutionary divergence (phylogenetic concordance) and (2) whether sex chromosomes share a common ancestor within a congeneric group. The monophyletic genus Triportheus (Characiformes, Triportheidae) was the model group for this study. All species in this genus so far analyzed have ZW sex chromosome system, where the Z is always the largest chromosome of the karyotype, whereas the W chromosome is highly variable ranging from almost homomorphic to highly heteromorphic. We applied conventional and molecular cytogenetic approaches including C-banding, ribosomal DNA mapping, comparative genomic hybridization (CGH) and cross-species whole chromosome painting (WCP) to test our questions. We developed Z- and W-chromosome paints from T. auritus for cross-species WCP and performed CGH in a representative species (T. signatus) to decipher level of homologies and rates of differentiation of W chromosomes. Our study revealed that the ZW sex chromosome system had a common origin, showing highly conserved Z chromosomes and remarkably divergent W chromosomes. Notably, the W chromosomes have evolved to different shapes and sequence contents within ~15–25 Myr of divergence time. Such differentiation highlights a dynamic process of W-chromosome evolution within congeneric species of Triportheus.
Data from: Evolution and conservation of Characidium sex chromosomes
Fish species exhibit substantial variation in the degree of genetic differentiation between sex chromosome pairs, and therefore offer the opportunity to study the full range of sex chromosome evolution. We used restriction-site associated DNA sequencing (RAD-seq) to study the sex chromosomes of Characidium gomesi, a species with conspicuous heteromorphic ZW/ZZ sex chromosomes. We screened 9863 single-nucleotide polymorphisms (SNPs), corresponding to ~1 marker/100 kb distributed across the genome for sex-linked variation. With this data set, we identified 26 female-specific RAD loci, putatively located on the W chromosome, as well as 148 sex-associated SNPs showing significant differentiation (average FST=0.144) between males and females, and therefore in regions of more recent divergence between the Z and W chromosomes. In addition, we detected 25 RAD loci showing extreme heterozygote deficiency in females but which were in Hardy–Weinberg equilibrium in males, consistent with degeneration of the W chromosome and therefore female hemizygosity. We validated seven female-specific and two sex-associated markers in a larger sample of C. gomesi, of which three localised to the W chromosome, thereby providing useful markers for sexing wild samples. Validated markers were evaluated in other populations and species of the genus Characidium, this exploration suggesting a rapid turnover of W-specific repetitive elements. Together, our analyses point to a complex origin for the sex chromosome of C. gomesi and highlight the utility of RAD-seq for studying the composition and evolution of sex chromosomes systems in wild populations.
Data from: The adaptive significance of chromosomal inversion polymorphisms in Drosophila melanogaster
Chromosomal inversions, structural mutations that reverse a segment of a chromosome, cause suppression of recombination in the heterozygous state. Several studies have shown that inversion polymorphisms can form clines or fluctuate predictably in frequency over seasonal time spans. These observations prompted the hypothesis that chromosomal rearrangements might be subject to spatially and/or temporally varying selection. Here we review what has been learned about the adaptive significance of inversion polymorphisms in the vinegar fly Drosophila melanogaster, the species in which they were first discovered by Sturtevant in 1917. A large body of work provides compelling evidence that several inversions in this system are adaptive; however, the precise selective mechanisms that maintain them polymorphic in natural populations remain poorly understood. Recent advances in population genomics, modeling and functional genetics promise to greatly improve our understanding of this longstanding and fundamental problem in the near future.
Dataset for chromosome-level genome assembly of Scapharca kagoshimensis
<p>Ark shells are commercially important clam species that inhabit in muddy sediments of shallow coasts in East Asia. For a long time, the lack of genome resources has hindered scientific research of ark shells. Here, we reported a high-quality chromosome-level genome assembly of <i><span>Scapharca kagoshimensis</span></i>, with an aim to unravel the molecular basis of heme biosynthesis, and develop genomic resources for genetic breeding and population genetics in ark shells.</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.