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206 results for “chromosome number”
Figure 2 from: Astuti G, Bedini G, Ciccarelli D, Liu L, Tiburtini M, Peruzzi L (2020) Chromosome numbers for the Italian flora: 9. Italian Botanist 9: 101-110. https://doi.org/10.3897/italianbotanist.9.54973
Figure 2 Pulmonaria vallarsae A.Kern. subsp. apennina (Cristof. & Puppi) L.Cecchi & Selvi from Passo del Muraglione (San Godenzo, Firenze), 2n = 22. Scale bar: 10 μm.
Figure 1 from: Astuti G, Bedini G, Ciccarelli D, Liu L, Tiburtini M, Peruzzi L (2020) Chromosome numbers for the Italian flora: 9. Italian Botanist 9: 101-110. https://doi.org/10.3897/italianbotanist.9.54973
Figure 1 Pulmonaria vallarsae A.Kern. subsp. apennina (Cristof. & Puppi) L.Cecchi & Selvi from Molino del Pallone (Sambuca Pistoiese, Pistoia), 2n = 22 (a) and 2n = 28 (b). Scale bar: 10 μm.
Figure 4 from: Astuti G, Bedini G, Ciccarelli D, Liu L, Tiburtini M, Peruzzi L (2020) Chromosome numbers for the Italian flora: 9. Italian Botanist 9: 101-110. https://doi.org/10.3897/italianbotanist.9.54973
Figure 4 Pulmonaria vallarsae A.Kern. subsp. vallarsae from Bellaria di Cei (Villa Lagarina, Trento), 2n = 22. Scale bar: 10 μm.
Figure 3 from: Astuti G, Bedini G, Ciccarelli D, Liu L, Tiburtini M, Peruzzi L (2020) Chromosome numbers for the Italian flora: 9. Italian Botanist 9: 101-110. https://doi.org/10.3897/italianbotanist.9.54973
Figure 3 Pulmonaria vallarsae A.Kern. subsp. vallarsae from Pian delle Fugazze (Vallarsa, Trento), 2n = 22. Scale bar: 10 μm.
Figure 8 from: Astuti G, Bedini G, Ciccarelli D, Liu L, Tiburtini M, Peruzzi L (2020) Chromosome numbers for the Italian flora: 9. Italian Botanist 9: 101-110. https://doi.org/10.3897/italianbotanist.9.54973
Figure 8 Potentilla detommasii Ten. from Belvedere del Malvento (Viggianello, Potenza), 2n = 14. Scale bar: 10 μm.
Figure 5 from: Di Pietro R, Conte AL, Fortini P, D'Amato G, Astuti G (2020) Chromosome numbers for the Italian flora: 10. Italian Botanist 10: 113-122. https://doi.org/10.3897/italianbotanist.10.61847
Figure 5 Sesleria caerulea (L.) Ard. from Bosco delle Tagliate (Capo di Ponte, Brescia), 2n = 28. Scale bar: 10 µm.
Figure 2 from: Di Pietro R, Conte AL, Fortini P, D'Amato G, Astuti G (2020) Chromosome numbers for the Italian flora: 10. Italian Botanist 10: 113-122. https://doi.org/10.3897/italianbotanist.10.61847
Figure 2 Plantago crassifolia Forssk. from Saline di Punta della Contessa (San Godenzo, Brindisi), 2n = 20. Scale bar: 10 µm.
Figure 1 from: Di Pietro R, Conte AL, Fortini P, D'Amato G, Astuti G (2020) Chromosome numbers for the Italian flora: 10. Italian Botanist 10: 113-122. https://doi.org/10.3897/italianbotanist.10.61847
Figure 1 Plantago albicans L. from Madonna delle Grazie (Pisticci, Matera), 2n = 20. Scale bar: 10 µm.
Figure 3 from: Di Pietro R, Conte AL, Fortini P, D'Amato G, Astuti G (2020) Chromosome numbers for the Italian flora: 10. Italian Botanist 10: 113-122. https://doi.org/10.3897/italianbotanist.10.61847
Figure 3 Plantago subulata L. from Isola di San Domino (Isole Tremiti, Foggia), 2n = 12. Scale bar: 10 µm.
Data from: Chromosome number evolves independently of genome size in a clade with non-localized centromeres (Carex: Cyperaceae)
The effects of chromosome rearrangement on genome size are poorly understood. While chromosome duplications and deletions have predictable effects on genome size, chromosome fusion, fission, and translocation do not. In this study, we investigate genome size and chromosome number evolution in 87 species of Carex, one of the most species-rich genera of flowering plants and one that has undergone an exceptionally high rate of chromosome rearrangement. Using phylogenetic generalized least squares regression, we find that the correlation between chromosome number and genome size in the genus grades from flat or weakly positive at fine phylogenetic scales to weakly negative at deeper phylogenetic scales. The rate of chromosome evolution exhibits a significant increase near the crown of a species-rich clade that arose approximately 5 million years ago. Genome size evolution, however, demonstrates a nearly constant rate across the entire tree. We hypothesize that this decoupling of genome size from chromosome number helps explain the high lability of chromosome number in the genus, as it reduces indirect selection on chromosome number.
Data from: Comparative linkage maps suggest that fission, not polyploidy, underlies near-doubling of chromosome number within monkeyflowers (Mimulus; Phrymaceae)
Changes in chromosome number and structure are important contributors to adaptation, speciation, and macroevolution. In flowering plants, polyploidy and subsequent reductions in chromosome number by fusion are major sources of chromosomal evolution, but chromosome number increase by fission has been relatively unexplored. Here, we use comparative linkage mapping with gene-based markers to reconstruct chromosomal synteny within the model flowering plant genus Mimulus (monkeyflowers). Two sections of the genus with haploid numbers {greater than or equal to} 14 have been inferred to be relatively recent polyploids because they are phylogenetically nested within numerous taxa with low base numbers (n = 8-10). We combined multiple datasets to build integrated genetic maps of the M. guttatus species complex (section Simiolus, n = 14) and the M. lewisii group (section Erythranthe; n = 8), and then aligned the two integrated maps using >100 shared markers. We observed strong segmental synteny between M. lewisii and M. guttatus maps, with essentially 1-to-1 correspondence across each of 16 chromosomal blocks. Assuming that the M. lewisii (and widespread) base number of 8 is ancestral, reconstruction of 14 M. guttatus chromosomes requires at least eight fission events (likely shared by Simiolus and sister section Paradanthus [n=16]), plus two fusion events. This apparent burst of fission in the yellow monkeyflower lineages raises new questions about mechanisms and consequences of chromosomal fission in plants. Our comparative maps also provide insight into the origins of a chromosome exhibiting centromere-associated female meiotic drive and create a framework for transferring M. guttatus genome resources across the entire genus.
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.
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.
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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.