Research Article

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10/17/2016
CMA/DAPI; cytotaxonomy; Jacaranda; Karyotypic variation; Terminal heterochromatin

Most taxa in the Bignoniaceae have 2n = 40, but the basal clade Jacarandeae has 2n = 36, suggesting that x = 18 is the ancestral basic number for the family. Variations in heterochromatin band patterns in genera that are numerically stable, such as Jacaranda, could facilitate our understanding of the chromosomal and karyotypic ... more

J.M.P. Cordeiro; S.A.A. Lima; S.N. Paz; A.M.S. Santos; L.P. Felix; J.M.P. Cordeiro; S.A.A. Lima; S.N. Paz; A.M.S. Santos; L.P. Felix
03/24/2016
cytotaxonomy; Psammolestes; Rhodnius; Spermiogenesis

The tribe Rhodniini is a monophyletic group composed of 22 species, with 19 in the Rhodnius genus and three in the Psammolestes genus. These insects are morphologically very similar (cryptic species), and new tools are important for investigating the taxonomy of these vectors. Spermiotaxonomy is an important tool in differentiating between related species, and this study ... more

A. Ravazi; J. Oliveira; J.A. Rosa; M.T.V. Azeredo-Oliveira; K.C.C. Alevi; A. Ravazi; J. Oliveira; J.A. Rosa; M.T.V. Azeredo-Oliveira; K.C.C. Alevi; A. Ravazi; J. Oliveira; J.A. Rosa; M.T.V. Azeredo-Oliveira; K.C.C. Alevi
08/24/2010
Karyotype; Marker chromosome; Small supernumerary marker chromosomes; Spontaneous abortion

We report a phenotypically normal couple with repeated spontaneous abortions and without other clinical features. Clinical, hematological, biochemical, and endocrinological aspects of the couple did not reveal any abnormalities. The karyotype of the wife was normal (46,XX), while the husband was found to have an abnormal karyotype, 47,XY,+der(22)mat. The marker chromosome was familial and non- ... more

M. Balkan; H. İsi; H. İsi; A. Gedik; M. Erdemoğlu; T. Budak
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4'; 6-diamidino-2-phenylindole; Chromomycin A3; Fluorescence in situ hybridization; Heptapteridae; Karyotype; Nucleolar organizer regions

We cytogenetically characterized three species of Hep­tapteridae (Pimelodella sp, Pimelodella taenioptera, and Imparfinis schubarti) by investigating the distribution of constitutive heterochro­matin and nucleolar organizer regions by silver nitrate impregnation (Ag-NOR) and fluorescence in situ hybridization. Pimelodella sp showed had a diploid ... more

L.M. Barbosa; G.E.B. Ferreira; A.C. Prizon; A.L.B. Portela-Castro; I.C. Martins-Santos
02/26/2016
Chromosome number; Karyotype; Lycoris radiata; Ploidy

Lycoris radiata is an important medicinal and ornamental plant of China. In the present study, somatic chromosome counts and karyotype analyses, which are important aspects of plant phylogeny and evolution, were performed in 466 individuals from 25 L. radiata populations by root tip squash method. Chromosome counts revealed that 10 populations were diploid (2n = 2x = 22 ... more

Y.X. Liu; Y.H. Zheng; T. Xia; J. Zhou; Y.X. Liu; Y.H. Zheng; T. Xia; J. Zhou
10/24/2016
Chromosomes; Cytogeography; Karyotype; Myrtaceae; Neotropics; Polyploidy

Polyploidy is one of the most important mechanisms of speciation and diversification in plant evolution. Polyploidy results in genetic variation among individuals of the same species and even between populations, and may be responsible for differences in environmental tolerance between populations of the same species. This study determined chromosome numbers of ... more

R.M. Silveira; R.M. Machado; E.R. Forni-Martins; C.F. Verola; I.R. Costa; R.M. Silveira; R.M. Machado; E.R. Forni-Martins; C.F. Verola; I.R. Costa
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Asians; Child; Chromosome Deletion; Chromosomes, Human, Pair 2; Fingers; Heart Defects, Congenital; Hedgehog Proteins; Humans; Karyotype; male; Syndactyly; Waardenburg Syndrome

Reports of terminal and interstitial deletions of the long arm of chromosome 2 are rare in the literature. Here, we present a case report concerning a Chinese boy with a 47,XYY karyotype and a de novo deletion comprising approximately 5 Mb between 2q35 and q36.1, along with syndactyly, type III Waardenburg syndrome, and congenital heart disease. High-resolution chromosome analysis to detect ... more

D. Wang; G.F. Ren; H.Z. Zhang; C.Y. Yi; Z.J. Peng
12/23/2016
Animals; DNA, Ribosomal; Fishes; In Situ Hybridization, Fluorescence; Karyotype; Karyotyping; Nucleolus organizer region

The spotted knifejaw, Oplegnathus punctatus, is an important aquaculture fish species in China. To better understand the chromosomal microstructure and the karyotypic origin of this species, cytogenetic analysis was performed using Giemsa staining to identify metaphase chromosomes, C-banding to detect C-positive heterochromatin, silver staining to identify the nucleolus organizer regions (Ag- ... more

P.Z. Li; D.D. Cao; X.B. Liu; Y.J. Wang; H.Y. Yu; X.J. Li; Q.Q. Zhang; X.B. Wang
4/20/2017
Animals; Chromosome banding; Chromosomes; Evolution, Molecular; Fishes; In Situ Hybridization, Fluorescence; Karyotype; Phylogeny

Sphyraena (barracudas) represents the only genus of the Sphyraenidae family and includes 27 species distributed into the tropical and subtropical oceanic regions. These pelagic predators can reach large sizes and, thus, attracting significant interest from commercial and sport fishing. Evolutionary data for this fish group, as well its chromosomal patterns, are very incipient. In the present ... more

R.X. Soares; M.B. Cioffi; L.A.C. Bertollo; A.T. Borges; G.W.W.F. Costa; W.F. Molina
5/10/2017
Animals; Ecosystem; Gene flow; Genetic Speciation; Karyotype; Perciformes; Polymorphism, Genetic; RNA, Ribosomal

The distribution patterns of marine biodiversity are complex, resulting from vicariant events and species dispersion, as well as local ecological and adaptive conditions. Furthermore, the wide geographic distribution of some species may be hindered by biogeographical barriers that can interfere in the gene flow. Cytogenetic analyses in marine fishes, especially those involving populations in ... more

K.D.J. Amorim; M.B. Cioffi; L.A.C. Bertollo; R.X. Soares; L.L. Calado; A.T. Borges; G.W.W.F. Costa; W.F. Molina

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