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Cytogenetics

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https://www.readbyqxmd.com/read/28922055/nance-horan-syndrome-in-females-due-to-a-balanced-x-1-translocation-that-disrupts-the-nhs-gene-familial-case-report-and-review-of-the-literature
#1
Laura Gómez-Laguna, Alejandro Martínez-Herrera, Alejandra Del Pilar Reyes-de la Rosa, Constanza García-Delgado, Karem Nieto-Martínez, Fernando Fernández-Ramírez, Tania Yanet Valderrama-Atayupanqui, Ariadna Berenice Morales-Jiménez, Judith Villa-Morales, Susana Kofman, Alicia Cervantes, Verónica Fabiola Morán-Barroso
The Nance-Horan syndrome is an X-linked disorder characterized by congenital cataract, facial features, microcornea, microphthalmia, and dental anomalies; most of the cases are due to NHS gene mutations on Xp22.13. Heterozygous carrier females generally present less severe features, and up to 30% of the affected males have intellectual disability. We describe two patients, mother and daughter, manifesting Nance-Horan syndrome. The cytogenetic and molecular analyses demonstrated a 46,X,t(X;1)(p22.13;q22) karyotype in each of them...
September 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28919972/cytogenetic-maps-of-homoeologous-chromosomes-a-h01-and-d-h01-and-their-integration-with-the-genome-assembly-in-gossypium-hirsutum
#2
Yuling Liu, Zhen Liu, Renhai Peng, Yuhong Wang, Zhongli Zhou, Xiaoyan Cai, Xingxing Wang, Zhenmei Zhang, Kunbo Wang, Fang Liu
Cytogenetic maps of Gossypium hirsutum (Linnaeus, 1753) homoeologous chromosomes Ah01 and Dh01 were constructed by fluorescence in situ hybridization (FISH), using eleven homoeologous-chromosomes-shared bacterial artificial chromosomes (BACs) clones and one chromosome-specific BAC clone respectively. We compared the cytogenetic maps with the genetic linkage and draft genome assembly maps based on a standardized map unit, relative map position (RMP), which allowed a global view of the relationship of genetic and physical distances along each chromosome, and assembly quality of the draft genome assembly map...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919968/a-new-species-of-melitaea-from-israel-with-notes-on-taxonomy-cytogenetics-phylogeography-and-interspecific-hybridization-in-the-melitaea-persea-complex-lepidoptera-nymphalidae
#3
Vladimir A Lukhtanov
Specimens with intermediate morphology are often considered to be the result of ongoing interspecific hybridization; however, this conclusion is difficult to prove without analysis of chromosomal and/or molecular markers. In the butterfly genus Melitaea, such an intermediacy can be detected in male genitalia, and is more or less regularly observed in localities where two closely related, presumably parental species are found in sympatry. Here I analyze a high altitude Melitaea population from Mt. Hermon in north Israel and show that its male genitalia are clearly differentiated from those found in phenotypically similar M...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919966/chromosomal-stasis-in-distinct-families-of-marine-percomorpharia-from-south-atlantic
#4
Fabilene Gomes Paim, Leandro Aragão da Hora Almeida, Paulo Roberto Antunes de Mello Affonso, Patrícia Elda Sobrinho-Scudeler, Claudio Oliveira, Débora Diniz
The weakness of physical barriers in the marine environment and the dispersal potential of fish populations have been invoked as explanations of the apparent karyotype stasis of marine Percomorpha, but several taxa remain poorly studied cytogenetically. To increase the chromosomal data in this fish group, we analyzed cytogenetically three widespread Atlantic species from distinct families: Chaetodipterus faber Broussonet, 1782 (Ephippidae), Lutjanus synagris Linnaeus, 1758 (Lutjanidae) and Rypticus randalli Courtenay, 1967 (Serranidae)...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919965/the-cerrado-brazil-plant-cytogenetics-database
#5
Fernando Roa, Mariana Pires de Campos Telles
Cerrado is a biodiversity hotspot that has lost ca. 50% of its original vegetation cover and hosts ca. 11,000 species belonging to 1,423 genera of phanerogams. For a fraction of those species some cytogenetic characteristics like chromosome numbers and C-value were available in databases, while other valuable information such as karyotype formula and banding patterns are missing. In order to integrate and share all cytogenetic information published for Cerrado species, including frequency of cytogenetic attributes and scientometrics aspects, Cerrado plant species were searched in bibliographic sources, including the 50 richest genera (with more than 45 taxa) and 273 genera with only one species in Cerrado...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919963/variability-of-nor-patterns-in-european-water-frogs-of-different-genome-composition-and-ploidy-level
#6
Anna Zaleśna, Maria Florek, Mariusz Rybacki, Maria Ogielska
We studied water frogs from a complex composed of two species: Pelophylax lessonae (Camerano, 1882) (genome LL, 2n = 26) and P. ridibundus (Pallas, 1771) (RR, 2 = 26), and their natural hybrid P. esculentus (Fitzinger, 1843) of various ploidy and genome composition (RL, 2n = 26, and RRL or RLL, 3n = 39). Tetraploids RRLL were found (4n = 52) in juveniles. We applied cytogenetic techniques: AgNO3, chromomycin A3, PI and fluorescent in situ hybridization with a 28S rDNA probe. Results obtained by silver staining corresponded well with those stained with CMA3, PI and FISH...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919962/a-karyotype-comparison-between-two-species-of-bordered-plant-bugs-hemiptera-heteroptera-largidae-by-conventional-chromosome-staining-c-banding-and-rdna-fish
#7
Lucila Belén Salanitro, Anabella Cecilia Massaccesi, Santiago Urbisaglia, María José Bressa, Mónica Gabriela Chirino
A cytogenetic characterization, including heterochromatin content, and the analysis of the location of rDNA genes, was performed in Largus fasciatus Blanchard, 1843 and L. rufipennis Laporte, 1832. Mitotic and meiotic analyses revealed the same diploid chromosome number 2n = 12 + X0/XX (male/female). Heterochromatin content, very scarce in both species, revealed C-blocks at both ends of autosomes and X chromosome. The most remarkable cytological feature observed between both species was the different chromosome position of the NORs...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919961/the-mugil-curema-species-complex-pisces-mugilidae-a-new-karyotype-for-the-pacific-white-mullet-mitochondrial-lineage
#8
Mauro Nirchio, Claudio Oliveira, Zoila R Siccha-Ramirez, Viviani F de Sene, Luciana Sola, Valentina Milana, Anna Rita Rossi
Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 species complex includes M. incilis Hancock, 1830, M. thoburni (Jordan & Starks, 1896) and at least four "M. curema" mitochondrial lineages, considered as cryptic species. The cytogenetic data on some representatives of the species complex have shown a high cytogenetic diversity. This research reports the results of cytogenetic and molecular analyses of white mullet collected in Ecuador. The analyzed specimens were molecularly assigned to the Mugil sp...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919960/karyotype-characterization-and-comparison-of-three-hexaploid-species-of-bromus-linnaeus-1753-poaceae
#9
Leonardo Luís Artico, Ana Cristina Mazzocato, Juliano Lino Ferreira, Carlos Roberto Carvalho, Wellington Ronildo Clarindo
Chromosome morphometry and nuclear DNA content are useful data for cytotaxonomy and to understand the evolutionary history of different taxa. For the genus Bromus Linnaeus, 1753, distinct ploidy levels have been reported, occurring from diploid to duodecaploid species. The geographic distribution of Bromus species has been correlated with chromosome number and ploidy level. In this study, the aims were to determine the nuclear genome size and characterize the karyotype of the South American Bromus species: Bromus auleticus Trinius ex Nees, 1829, Bromus brachyanthera Döll, 1878 and Bromus catharticus Vahl, 1791...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919959/chromosome-mapping-in-abracris-flavolineata-de-geer-1773-orthoptera-from-the-igua%C3%A3-u-national-park-foz-do-igua%C3%A3-u-paran%C3%A3-brazil
#10
Mariana Bozina Pine, Raquel Bozini Gallo, Carlos Roberto Maximiano da Silva, Larissa Forim Pezenti, Fernando Campos De Domenico, Vilma Loreto, Renata da Rosa
In this paper, we present the cytomolecular analysis of a population of Abracris flavolineata collected in the largest fragment of the Brazilian Atlantic forest, the Iguaçu National Park. The diploid number in males was 23 (22+X0), with two large pairs (1-2), 7 medium (3-9), 2 small (10-11) and the X chromosome of medium size. Heterochromatic blocks were evident in the pericentromeric regions of all chromosomes. Heterogeneity in the distribution of heterochromatin was observed, with a predominance of DAPI(+) blocks...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919957/a-cytogenetic-study-of-three-parasitic-wasp-species-hymenoptera-chalcidoidea-eulophidae-trichogrammatidae-from-brazil-using-chromosome-morphometrics-and-base-specific-fluorochrome-staining
#11
Vladimir E Gokhman, Fabricio Fagundes Pereira, Marco Antonio Costa
Chromosomes of three chalcid wasp species from Brazil, Palmistichus elaeisis Delvare et LaSalle, 1993, Trichospilus diatraeae Cherian et Margabandhu, 1942 (both belonging to the family Eulophidae) and Trichogramma pretiosum Riley, 1879 (Trichogrammatidae), were studied using chromosome morphometrics and base-specific fluorochrome staining. The present study confirmed that these species respectively have 2n = 12, 14 and 10. Chromomycin A3 / 4', 6-diamidino-2-phenylindole (CMA3/DAPI) staining revealed a single CMA3-positive and DAPI-negative band within haploid karyotypes of both Palmistichus elaeisis and Trichogramma pretiosum...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919956/first-karyotype-description-and-nuclear-2c-value-for-myrsine-primulaceae-comparing-three-species
#12
Renata Flávia de Carvalho, Paulo Marcos Amaral-Silva, Micheli Sossai Spadeto, Andrei Caíque Pires Nunes, Tatiana Tavares Carrijo, Carlos Roberto Carvalho, Wellington Ronildo Clarindo
Cytogenetic studies in Primulaceae are mostly available for herbaceous species, and are focused on the chromosome number determination. An accurate karyotype characterization represents a starting point to know the morphometry and class of the chromosomes. Comparison among species within Myrsine, associating these data with the nuclear 2C value, can show changes that led the karyotype evolution. Here, we studied three Myrsine species [Myrsine coriacea (Swartz, 1788) Brown ex Roemer et Schultes, 1819, Myrsine umbellata Martius, 1841 and Myrsine parvifolia Candolle, 1841] that show different abilities to occupy the varied types of vegetation within the Brazilian Atlantic Forest...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919953/cytogenetic-studies-in-the-redtail-catfish-phractocephalus-hemioliopterus-bloch-schneider-1801-siluriformes-pimelodidae-a-giant-fish-from-amazon-basin
#13
Ana Claudia Swarça, Ana Lucia Dias, Alberto Sergio Fenocchio
The objective of this study was to cytogenetically analyze Phractocephalus hemioliopterus comparing the findings with other data to infer relationships among Pimelodidae species. The results revealed a diploid number of 2n = 56 and the karyotype composed of 16 metacentric, 20 submetacentric, 6 subtelocentric and 14 acrocentric chromosomes (FN = 98). The Ag-NORs, 18S rDNA and CMA3 signals were coincident in location occupying the short arm of an acrocentric chromosome pair (23(th)), in a secondary constriction...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919951/origin-of-b-chromosomes-in-characidium-alipioi-characiformes-crenuchidae-and-its-relationship-with-supernumerary-chromosomes-in-other-characidium-species
#14
Érica Alves Serrano, Ricardo Utsunomia, Patrícia Sobrinho Scudeller, Claudio Oliveira, Fausto Foresti
B chromosomes are apparently dispensable components found in the genomes of many species that are mainly composed of repetitive DNA sequences. Among the numerous questions concerning B chromosomes, the origin of these elements has been widely studied. To date, supernumerary chromosomes have been identified in approximately 60 species of fish, including species of the genus Characidium Reinhardt, 1867 in which these elements appear to have independently originated. In this study, we used molecular cytogenetic techniques to investigate the origin of B chromosomes in a population of Characidium alipioi Travassos, 1955 and determine their relationship with the extra chromosomes of other species of the genus...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919950/chromosome-mapping-of-a-tc1-like-transposon-in-species-of-the-catfish-ancistrus
#15
Keteryne Rodrigues da Silva, Sandra Mariotto, Liano Centofante, Patricia Pasquali Parise-Maltempi
The Tc1 mariner element is widely distributed among organisms and have been already described in different species of fish. The genus Ancistrus (Kner, 1854) has 68 nominal species and is part of an interesting taxonomic and cytogenetic group, as well as presenting a variation of chromosome number, ranging from 2n=34 to 54 chromosomes, and the existence of simple and multiple sex chromosome system and the occurrence of chromosomal polymorphisms involving chromosomes that carry the nucleolus organizer region...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919949/first-report-of-b-chromosomes-in-three-neotropical-thorny-catfishes-siluriformes-doradidae
#16
Fábio Hiroshi Takagui, Ana Lucia Dias, José Luís Olivan Birindelli, Ana Claudia Swarça, Renata da Rosa, Roberto Laridondo Lui, Alberto Sergio Fenocchio, Lucia Giuliano-Caetano
The family Doradidae (Siluriformes) is an important group of fishes endemic to freshwater ecosystems in South America. Some cytogenetic studies have been conducted focused on the group; however, there are no reports on the occurrence of B chromosomes for the family. In this paper the chromosomal characteristics of Platydoras armatulus (Valenciennes, 1840), Pterodoras granulosus (Valenciennes, 1821) and Ossancora punctata (Kner, 1855) were investigated through classical cytogenetics approaches. The conventional staining reveals 2n=58 in Platydoras armatulus and Pterodoras granulosus, however with distinct karyotypic formulae, possibly originated by pericentric inversions...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919948/cytogenetic-data-on-the-agro-predatory-ant-megalomyrmex-incisus-smith-1947-and-its-host-mycetophylax-conformis-mayr-1884-hymenoptera-formicidae
#17
Danon Clemes Cardoso, Tássia Tatiane Pontes Pereira, Alessandro Lick Cordeiro, Maykon Passos Cristiano
We provide the first karyotype description of the agro-predatory ant species Megalomyrmex incisus Smith, 1947 (Myrmicinae, Formicidae), and chromosome counts of its host Mycetophylax conformis (Mayr, 1884) (Myrmicinae, Formicidae) from geographically distinct populations. Colonies of both species were sampled from coastal areas of Ilhéus, Bahia, Brazil, and transferred to the laboratory. Metaphase spreads were prepared from the cerebral ganglia of defecated larvae. The slides were examined and pictures of the best metaphases were taken...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919947/genomic-characterisation-of-arachis-porphyrocalyx-valls-c-e-simpson-2005-leguminosae-multiple-origin-of-arachis-species-with-x-9
#18
Silvestri María Celeste, Alejandra Marcela Ortiz, Germán Ariel Robledo, José Francisco Montenegro Valls, Graciela Inés Lavia
The genus Arachis Linnaeus, 1753 comprises four species with x = 9, three belong to the section Arachis: Arachis praecox (Krapov. W.C. Greg. & Valls, 1994), Arachis palustris (Krapov. W.C. Greg. & Valls, 1994) and Arachis decora (Krapov. W.C. Greg. & Valls, 1994) and only one belongs to the section Erectoides: Arachis porphyrocalyx (Valls & C.E. Simpson, 2005). Recently, the x = 9 species of section Arachis have been assigned to G genome, the latest described so far. The genomic relationship of Arachis porphyrocalyx with these species is controversial...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919946/cytogenetic-characterization-of-hoplias-malabaricus-bloch-1794-from-the-ctalamochita-river-c%C3%A3-rdoba-argentina-first-evidence-for-southernmost-populations-of-this-species-complex-and-comments-on-its-biogeography
#19
Diego Javier Grassi, Ana Claudia Swarça, Jorge Abdala Dergam, María Cristina Pastori, Alberto Sergio Fenocchio
Hoplias malabaricus (Bloch, 1794), a predatory freshwater fish with a wide distribution throughout South America, represents a species complex with seven well characterized karyomorphs at the cytogenetic level. Although this species has been extensively studied in several Brazilian basins, data are still scarce for hydrographic systems from other South American countries. This study aims to characterize cytogenetically the Hoplias malabaricus populations from the Argentinean Central Region, close to the southernmost distribution of this species complex...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28918304/haploidentical-transplantation-for-older-patients-with-acute-myeloid-leukemia-and-myelodysplastic-syndrome
#20
Stefan O Ciurea, Mithun V Shah, Rima M Saliba, Sameh Gaballa, Piyanuch Kongtim, Gabriela Rondon, Julianne Chen, Whitney Wallis, Kai Cao, Marina Konopleva, Naval Daver, Jorge Cortes, Farhad Ravandi, Amin Alousi, Sairah Ahmed, Uday Popat, Simrit Parmar, Qaiser Bashir, Oran Betul, Chitra Hosing, Elizabeth J Shpall, Katayoun Rezvani, Issa F Khouri, Partow Kebriaei, Richard E Champlin
Allogeneic stem cell transplant (ASCT) with HLA matched donors is increasingly used for older patients with AML/MDS. It remains unclear if haploidentical transplantation (haploSCT) is a suitable option for older patients with this disease. We analyzed 43 patients with AML/MDS (median age 61 years) who underwent a haploSCT at our institution. All the patients received a fludarabine-melphalan-based reduced-intensity conditioning regimen and post-transplant cyclophosphamide-based GVHD prophylaxis. Except one patient who had early death, the remaining 42 patients (98%) engrafted donor cells...
September 13, 2017: Biology of Blood and Marrow Transplantation
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