Chromosomes
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):
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
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):
Meiotic behavior and karyotypic variation in Acledra (Pentatomidae, Heteroptera)
Authors: P.J. Rebagliati and L.M. Mola
Acledra comprises 15 taxonomically identified species, most of which are crop pests. This is the first cytogenetic study of species of this genus. Acledra kinbergii and A. modesta showed the modal number of the Pentatomidae (2n = 14 = 12 + XY), while A. bonariensis had a reduced complement (2n = 12 = 10 + XY), with a markedly .. Read More»
- Genet. Mol. Res. 9(2):
- vol9-2gmr763
- DOI:
- 10.4238/vol9-2gmr763
Establishment of the genomic in situ hybridization (GISH) technique for analysis in interspecific hybrids of Passiflora
Authors: C.A.F. Melo, G.S. Silva and M.M. Souza
The genomic in situ hybridization (GISH) technique was applied to Passiflora interspecific F1 HD13-133 hybrids (Passiflora sublanceolata x Passiflora foetida) and HD15-101 (Passiflora gardineri x Passiflora gibertii), and the backcrossed hybrids (BC1) HD18-106 and HD18-113 (Passiflora sublanceolata x HD13-133). GISH was performed using genomic probes prep.. Read More»
- Genet. Mol. Res. 14(1):
- 2015.March.27.4
- DOI:
- 10.4238/2015.March.27.4
A cytogenetics study of Hydrodroma despiciens (M�¼ller, 1776) (Acari: Hydrachnellae: Hydrodromidae)
Authors: Serap Tutgun Onrat, Ferruh Ax�§i and Muhlis ��zkan
The karyotypes of water mites (Acari: Hydrachnellae: Hydrodromidae) are largely unknown. The present investigation is the first report of a study designed to characterize the chromosomes of water mites. The study was carried out with specimens of Hydrodroma despiciens collected from Eber Lake in Afyon, Turkey. Several differen.. Read More»
- Genet. Mol. Res. 5(2):
Environmental variations drive polyploid evolution in neotropical Eugenia species (Myrtaceae)
Authors: R.M. Silveira, R.M. Machado, E.R. Forni-Martins, C.F. Verola and I.R. Costa
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 stu.. Read More»
- Genet. Mol. Res. 15(4):
- gmr15048842
- DOI:
- 10.4238/gmr15048842
Localization of rDNA sites in holocentric chromosomes of three species of triatomines (Heteroptera, Triatominae)
Authors: Grasiela Dias de Campos Severi-Aguiar and Maria TercÃ?Âlia Vilela de Azeredo-Oliveira
Chromatin organization in the holocentric chromosomes of three triatomines species was cytologically studied by fluorescent in situ hybridization with a 45S rDNA probe of Drosophila melanogaster to localize ribosomal genes. In Triatoma tibiamaculata, metaphases I showed telomeric highlights in a single, larger bivalent. In T. .. Read More»
- Genet. Mol. Res. 4(4):
Cytogenetic analysis in the spermatogenesis of Triatoma melanosoma (Reduviidae; Heteroptera)
Authors: V.B. Bardella, M.T.V. Azeredo-Oliveira and E. Tartarotti
Triatomines are of great concern in public health because they are vectors of Chagas’ disease. This study presents an analysis of the species Triatoma melanosoma. The cytogenetic characteristics of triatomines include holocentric chromosomes, post-reductional meiosis in the sex chromosomes and nucleolar fragmentation in .. Read More»
- Genet. Mol. Res. 7(2):
- vol7-2gmr411
- DOI:
- 10.4238/vol7-2gmr411
Gametocidal chromosomes enhancing chromosome aberration in common wheat induced by 5-azacytidine
Authors: W.-Y. Su, W.-W. Cong, Y.-J. Shu, D. Wang, G.-H. Xu, C.-H. Guo
The gametocidal (Gc) chromosome from Aegilops spp induces chromosome mutation, which is introduced into common wheat as a tool of chromosome manipulation for genetic improvement. The Gc chromosome functions similar to a restriction-modification system in bacteria, in which DNA methylation is an important regulator. We treated root tips of wheat carrying G.. Read More»
- Genet. Mol. Res. 12(3):
- 2013.July.8.4
- DOI:
- 10.4238/2013.July.8.4