Research Article

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Ag-NOR; chromosome; Fluorochrome staining; Stingless bee

Scaptotrigona xanthotricha has a wide geographic distribution in the Brazilian Atlantic rainforest. One population from southeast and two from northeast Brazil were analyzed and were found to have chromosome polymorphisms. Although the chromo­some number 2n = 34 is conserved in this species, karyotypic analy­sis revealed clear differences between the three populations. Congru­ent ... more

O.M.P. Duarte; C.C.C. Martins; A.M. Waldschmidt; M.A. Costa
chromosome; Cytogenetics; Euphorbia heterophylla; Nucleolus

Euphorbia heterophylla L. (Euphorbiaceae) is a herbaceous species of great economic importance due to its invasive potential and consequent damage to agriculture and pasture land. For the first time, we provide information on its chromosome number, morphology, and behavior of mitotic chromosomes. Seeds were germinated and submitted to four treatments to obtain metaphases: 0.5% ... more

J.R. Aarestrup; D. Karam; G.W. Fernandes
chromosome; Klinefelter’s syndrome; Male infertility; Preimplantation genetic diagnosis; Prenatal diagnosis

The purpose of this study was to detect chromosomal aberrations and azoospermia factor (AZF) microdeletions in male patients with reproductive problems and to summarize related clinical features to provide reliable information for evaluating prenatal and preimplantation diagnoses. A large cohort of 5083 men with various phenotypes of male infertility was analyzed via G-banding karyotyping ... more

Q. Quan; T.J. Li; X.P. Ding; J. Wei; L.X. Li; L. Fu
45S rDNA; AgNOR-banding; Anura; chromosome; Evolution

Chromosome numbers, morphology, and nucleolus organizer region (NOR) locations are useful cytological characters for taxonomic and evolutionary studies. In this study, we provide the first cytogenetic analysis of Phyllomedusa bahiana and Phasmahyla spectabilis, and report new cytogenetic data on variation in NOR numbers and positions in Phyllomedusa rohdei and ... more

A. Barth; V.A. Souza; M. Solé; M.A. Costa
Aegilops biuncialis; C-banding; chromosome; Fluorescence in situ hybridization; Karyotype

Aegilops biuncialis can be hybridized with wheat (Triticum spp) and has been used for wheat breeding and genetic studies. The A. biuncialis karyotype (Ub Ub Mb Mb) was investigated based on three A. biuncialis accessions grown in China. Two pairs of SAT chromosomes were identified as 1Ub and 5Ub ... more

J. Wang; W. Zhang; H. Zhao; F.R. Li; Z.G. Wang; J. Ji; X.Q. Zhang; D.W. Wang; J.M. Li
Cannabis sativa; chromosome; Genetic diversity; Inter-simple sequence repeat

Hemp (Cannabis sativa) is an important fiber crop, and native cultivars exist widely throughout China. In the present study, we analyzed the genetic diversity of 27 important Chinese native hemp cultivars, by using inter-simple sequence repeats (ISSR) and chromosome markers. We determined the following chromosome formulas: 2n = 20 = 14m + 6sm; 2n = 20 = 20m; 2 ... more

L.G. Zhang; Y. Chang; X.F. Zhang; F.Z. Guan; H.M. Yuan; Y. Yu; L.J. Zhao
EGFR; FISH; Metastasis; NSCLC

The aim of this study was to explore epidermal growth factor receptor (EGFR) gene amplification and its relationship with cancer invasion and metastasis in non-small cell lung cancer (NSCLC). EGFR amplification in 45 patients with NSCLC and 15 subjects with normal lung tissues was detected by fluorescence in situ hybridization. The relationship between EGFR ... more

X.F. Jia; J. Li; H.B. Zhao; J. Liu; J.J. Liu
Array CGH; Balanced reciprocal translocation; DiGeorge syndrome; FISH; Karyotype; Velocariofacial syndrome

Partial duplication of the long arm of chromosome 11 and the partial trisomy of 22q are uncommon karyotypic abnormalities. Here, we report the case of a 6-year-old girl who showed partial trisomy of 11q and 22q, as a result of a maternal balanced reciprocal translocation (11;22), and exhibited dysmorphic features, severe intellectual disability, brain malformations, and speech delay ... more

P.S. Zou; H.F. Li; L.S. Chen; M. Ma; X.H. Chen; D. Xue; D.H. Cao; P.S. Zou; H.F. Li; L.S. Chen; M. Ma; X.H. Chen; D. Xue; D.H. Cao
Array-SNP; FISH; Prenatal diagnosis; Trisomy 7q11.23q21.3; VSD

The objective of prenatal diagnosis (PD) is to provide prenatal diagnostic testing services for genetic conditions that enable families to make informed choices consistent with their individual needs and values, and to support them in deal with the outcome of such testing. This case we reported is about two fetuses with ventricular septal defect (VSD) and trisomy ... more

K. Mu; L.Sha Chen; J. Wen; Y. Liu; N. Liu; D.Hua Cao
Chromosomal microarray; Complex chromosomal rearrangement; FISH; Neurodevelopmental delay; PURA syndrome

Complex chromosomal rearrangements are extremely rare in humans. Most apparently balanced complex chromosomal rearrangements are de novo; they usually are detected in phenotypically normal subjects. Nevertheless, in some cases they are found in patients with multiple congenital abnormalities and neurodevelopmental disorders, which may be due to cryptic ... more

M.E. Minzhenkova; D.A. Yurchenko; N.A. Semenova; Z.G. Markova; A.A. Tarlycheva; N.V. Shilova