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3,458 results for “chromosomes”
FIGURES 1–2 in A new species of Miogryllus Saussure, 1877 and new record of Miogryllus piracicabensis Piza, 1960 (Orthoptera: Gryllidae) from State of Rio Grande do Sul, Brazil, with calling song and chromosome complement
FIGURES 1–2. Habitus of Miogryllus itaquiensis n. sp. in vivo. 1—male Holotype; 2—female paratype.
FIGURES 1–2 in new species of Miogryllus Saussure, 1877 and new record of Miogryllus piracicabensis Piza, 1960 (Orthoptera: Gryllidae) from State of Rio Grande do Sul, Brazil, with calling song and chromosome complement
FIGURES 1–2. Habitus of Miogryllus itaquiensis n. sp. in vivo. 1—male Holotype; 2—female paratype.
FIGURES 21–22 in new species of Miogryllus Saussure, 1877 and new record of Miogryllus piracicabensis Piza, 1960 (Orthoptera: Gryllidae) from State of Rio Grande do Sul, Brazil, with calling song and chromosome complement
FIGURES 21–22. Habitus of Miogryllus piracicabensis Piza, 1960 in vivo. 1—male, 2—female.
Figure 5 in A new genus of African Acrometopini (Tettigoniidae: Phaneropterinae) based on morphology, chromosomes, acoustics, distribution, and molecular data, and the description of a new species
Figure 5. Spectra of the calling songs of two Altihoratosphaga species.
Figure 10 in A new genus of African Acrometopini (Tettigoniidae: Phaneropterinae) based on morphology, chromosomes, acoustics, distribution, and molecular data, and the description of a new species
Figure 10. The distribution of Altihoratosphaga species in East Africa.
Figure 7 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 7 Dianthus carthusianorum L. subsp. tenorei (Lacaita) Pignatti from Monte Pollino (Basilicata): (a) diploid cell, 2n = 30, (b) endotetraploid cell, 2n = 60. Scale bar: 10 μm.
Figure 6 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 6 Hieracium scopolioides Gottschl. & S.Orsenigo from Mt. Lesima (Zerba, Piacenza), 2n = 27. Scale bar: 10 μm.
Figure 5 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 5 Hieracium lesimanum Gottschl. & S.Orsenigo from Mt. Lesima (Zerba, Piacenza), 2n = 27. Scale bar: 10 μm.
Figure 2 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 2 Helosciadium crassipes W.D.J.Koch ex Rchb. from Perdiana (Mogoro, Oristano), 2n = 22. Scale bar: 10 μm.
Figure 4 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 4 Hieracium hypochoeroides subsp. cilentanum Di Grist., Gottschl. & Raimondo from Mt. Cervati (Sanza, Salerno), 2n = 27. Scale bar: 10 μm.
Figure 3 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 3 Hieracium terraccianoi Di Grist., Gottschl. & Raimondo from Scala di Gaudolino (Morano Calabro, Cosenza), 2n = 36. Scale bar: 10 μm.
Figure 1 from: Astuti G, Bagella S, Bajona E, Barone G, Becca G, Caria MC, Di Gristina E, Fainelli F, Franzoni J, Giacò A, Orsenigo S, Paliy M, Rivieccio G, Urbani M, Peruzzi L (2023) Chromosome numbers for the Italian flora: 13. Italian Botanist 16: 135-148. https://doi.org/10.3897/italianbotanist.16.116700
Figure 1 Damasonium alisma Mill. from Funtana Satoa (Montresta, Oristano), 2n = 28. Scale bar: 10 μm.
Supplementary material 1 from: Tonyan ZN, Puppo IL, Saifitdinova AF, Vavilova TV, Glotov AS (2024) Assessment of quadrivalent characteristics influencing chromosome segregation by analyzing human preimplantation embryos from reciprocal translocation carriers. Comparative Cytogenetics 18: 1-13. https://doi.org/10.3897/compcytogen.18.115070
Supplementary information
Non canonical bases differentially represented in the sex chromosomes of the dioecious plant Silene latifolia
Open the record for dataset details and reuse information.
High-quality, chromosome-level reference genomes of the viviparous Caribbean skinks Spondylurus nitidus and S. culebrae
<p>Output files from the assembly of 2 reference genomes detailed in the publication Rivera et al. 2024. High-quality, chromosome-level reference genomes of the viviparous Caribbean skinks <em>Spondylurus nitidus</em> and <em>S. culebrae. Genome Biology and Evolution</em>, evae079.</p>
Restricted X chromosome introgression and support for Haldane's rule in hybridizing damselflies
<p>Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and allow to shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridisation. Moreover, they are thought to contribute to Haldane's rule which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of <i>Ischnura elegans</i>, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with its sister species <i>Ischnura graellsii</i>. We analysed genome-wide SNPs in the Spanish <i>I. elegans</i> and <i>I. graellsii</i> hybrid zone and found (i) that the X chromosome shows less genomic introgression compared to autosomes and (ii) that males are underrepresented among admixed individuals as predicted by Haldane's rule. This is the first study in Odonata that suggests a role of the X chromosome in reproductive isolation. Moreover, our data adds to the few studies on species with X0 sex determination system and contradicts the hypothesis that the absence of a Y chromosome causes exceptions to Haldane's rule.</p>
Ubiquity and evolution of structural maintenance of chromosomes (SMC) proteins in eukaryotes
<p>Structural maintenance of chromosomes (SMC) protein complexes are common in Bacteria, Archaea, and Eukaryota. SMC proteins, together with the proteins related to SMC (SMC-related proteins), constitute a superfamily of ATPases. Bacteria/Archaea and Eukaryotes are distinctive from one another in terms of the repertory of SMC proteins. A single type of SMC protein is dimerized in the bacterial and archaeal complexes, whereas eukaryotes possess six distinct SMC subfamilies (SMC1-6), constituting three heterodimeric complexes, namely cohesin, condensin, and SMC5/6 complex. Thus, to bridge the homodimeric SMC complexes in Bacteria and Archaea to the heterodimeric SMC complexes in Eukaryota, we need to invoke multiple duplications of an SMC gene followed by functional divergence. However, to our knowledge, the evolution of the SMC proteins in Eukaryota had not been examined for more than a decade. In this study, we reexamined the ubiquity of SMC1-6 in phylogenetically diverse eukaryotes that cover the major eukaryotic taxonomic groups recognized to date and provide two novel insights into the SMC evolution in eukaryotes. First, multiple secondary losses of SMC5 and SMC6 occurred in the eukaryotic evolution. Second, the SMC proteins constituting cohesin and condensin (i.e., SMC1-4), and SMC5 and SMC6 were derived from closely related but distinct ancestral proteins. Based on the above-mentioned findings, we discuss how SMC1-6 have diverged from the archaeal homologs.</p>
Figure 6 from: Astuti G, Bartolucci F, Conti F, Cera B, Giacò A, Orsenigo S, Sandroni L, Peruzzi L (2021) Chromosome numbers for the Italian flora: 12. Italian Botanist 12: 123-131. https://doi.org/10.3897/italianbotanist.12.79031
Figure 6 Onopordum illyricum L. subsp. illyricum from c.da Rossillo (San Marco Argentano, Cosenza), 2n = 34. Scale bar: 10 μm.
Figure 4 from: Astuti G, Bartolucci F, Conti F, Cera B, Giacò A, Orsenigo S, Sandroni L, Peruzzi L (2021) Chromosome numbers for the Italian flora: 12. Italian Botanist 12: 123-131. https://doi.org/10.3897/italianbotanist.12.79031
Figure 4 Hieracium glanduliferum Hoppe subsp. glanduliferum from Monte Prado (Ventasso, Reggio Emilia), 2n = 27. Scale bar: 10 μm.
Figure 2 from: Astuti G, Bartolucci F, Conti F, Cera B, Giacò A, Orsenigo S, Sandroni L, Peruzzi L (2021) Chromosome numbers for the Italian flora: 12. Italian Botanist 12: 123-131. https://doi.org/10.3897/italianbotanist.12.79031
Figure 2 Armeria denticulata (Bertol.) DC. from (a) Castello della Brina (Sarzana, La Spezia), (b) Poggio Pelato (Rosignano, Livorno), and (c) Monteferrato (Prato), 2n = 18. Scale bar: 10 μm.
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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.