Chromosome
Possible origins of B chromosomes in Rineloricaria pentamaculata (Loricariidae, Siluriformes) from the Paran�¡ River basin
Authors: F.E. Porto, A.L.B. Portela-Castro and I.C. Martins-Santos
We made a cytogenetic study of Rineloricaria pentamaculata from the Tauá Stream, in the Pirapó River sub-basin in Paraná State, Brazil, focused on the occurrence and origins of the B chromosomes. The diploid number varied from 2n = 56 to 2n = 59, due to the presence of 0 to 3 B microchromosomes of the acro.. Read More»
- Genet. Mol. Res. 9(3):
- vol9-3gmr859
- DOI:
- 10.4238/vol9-3gmr859
Homology of polytene elements between Drosophila and Zaprionus determined by in situ hybridization in Zaprionus indianus
Authors: Campos SRC, Rieger TT and Santos JF
The drosophilid Zaprionus indianus due to its economical importance as an insect pest in Brazil deserves more investigation into its genetics. Its mitotic karyotype and a line-drawing map of its polytene chromosomes are already available. This paper presents a photomap of Z. indianus polytene chromosomes, which was used as the.. Read More»
- Genet. Mol. Res. 6(2):
Sex-biased gene flow in African Americans but not in American Caucasians
Authors: Goncalves VF, Prosdocimi F, Santos LS, Ortega JM and Pena SDJ
We have previously shown evidence of strong sex-biased genetic blending in the founding and ongoing history of the Brazilian population, with the African and Amerindian contribution being highest from maternal lineages (as measured by mitochondrial DNA) and the European contribution foremost from paternal lineages (estimated f.. Read More»
- Genet. Mol. Res. 6(2):
Postnatal diagnosis of constitutive ring chromosome 13 using both conventional and molecular cytogenetic approaches
Authors: L.B. Minasi, I.P. Pinto, J.G. de Almeida, A.V. de Melo,D.M.C. Cunha, C.L. Ribeiro, G.P. Silva, M.G. Brasil, D.M. Silva, C.C. da Silva and A.D. da Cruz
We describe the first postnatal diagnosis of a child from Central Brazil with de novo cytogenetic alterations in 13q showing malformations of the brain, eyes, distal limbs, and genitourinary tract, and severe intellectual disability. The karyotype was a constitutive 46,XX,r(13)[77]/45,XX,-13[17]/46,XX,idic r(13)[6]. Interphase and metaphase fluorescence i.. Read More»
- Genet. Mol. Res. 14(1):
- 2015.March.6.15
- DOI:
- 10.4238/2015.March.6.15
Genetic analysis of STR markers on chromosome 21 in a Han population from southeast China
Authors: Y.N. Zhu, S.M. Lu, M. Wang, F.X. Shen, Y. Chen and J.J. Hu
Short tandem repeats (STRs) are highly polymorphic sequences and have been extensively used as genetic markers in mapping studies, disease diagnosis, and human identity testing. In this study, 11 STR markers on chromosome 21, including D21S1432, D21S11, D21S1246, D21S1412, D21S1437, D21S1442, D21S2039, D21S1270, D21S1435, D21S1409, and D21S1446, were anal.. Read More»
- Genet. Mol. Res. 14(1):
- 2015.March.6.18
- DOI:
- 10.4238/2015.March.6.18
New evidence for nucleolar dominance in hybrids of Drosophila arizonae and Drosophila mulleri
Authors: C.I. Oliveira, H.E.M.C. Bicudo and M.M. Itoyama
Drosophila mulleri (MU) and D. arizonae (AR) are cryptic species of the mulleri complex, mulleri subgroup, repleta group. Earlier cytogenetic studies revealed that these species have different regulatory mechanisms of nucleolar organizing activity. In these species, nucleolar organizing regions are found in both the X chromoso.. Read More»
- Genet. Mol. Res. 5(4):
A small supernumerary marker chromosome, derived from chromosome 22, possibly associated with repeated spontaneous abortions
Authors: M. Balkan, H. �°si, A. Gedik, M. Erdemo��lu and T. Budak
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 karyo.. Read More»
- Genet. Mol. Res. 9(3):
- vol9-3gmr947
- DOI:
- 10.4238/vol9-3gmr947
Pedigrees of infertile Chinese men with Y chromosome microdeletions derived from natural transmission and de novo mutation
Authors: L.L. Li, Y.Z. Zhu, X.W. Yu, R.X. Wang, Z.M. Hu and R.Z. Liu
Y chromosome microdeletions can cause male infertility and are classified as natural transmission and de novo mutations. To examine the source of these deletions in Chinese men and to provide a theoretical and laboratory basis for genetic counseling, patients from Northeast China with primary male infertility (N = 22) and their fathers were investigated. .. Read More»
- Genet. Mol. Res. 14(1):
- 2015.March.20.3
- DOI:
- 10.4238/2015.March.20.3
Construction and partial characterization of a Corynebacterium pseudotuberculosis bacterial artificial chromosome library through genomic survey sequencing
Authors: F.A. Dorella, M.S. Fachin, A. Billault, E. Dias Neto, C. Soravito, S.C. Oliveira, R. Meyer, A. Miyoshi and V. Azevedo
Corynebacterium pseudotuberculosis is a gram-positive bacterium that causes caseous lymphadenitis in sheep and goats. However, despite the economic losses caused by caseous lymphadenitis, there is little information about the molecular mechanisms of pathogenesis of this bacterium. Genomic libraries constructed in bacterial art.. Read More»
- Genet. Mol. Res. 5(4):
Effects of the plant steroidal hormone, 24-epibrassinolide, on the mitotic index and growth of onion (Allium cepa) root tips
Authors: Howell WM, Keller III GE, Kirkpatrick JD, Jenkins RL, Hunsinger RN and McLaughlin EW
The purpose of the present study was to determine the effects of the steroidal plant hormone, 24-epibrassinolide (BL), on the mitotic index and growth of onion (Allium cepa) root tips. The classical Allium test was used to gather and quantify data on the rate of root growth, the stages of mitosis, and the number of mitoses in .. Read More»
- Genet. Mol. Res. 6(1):