Chromosomes
A brief note on chromosomal abberation
Authors: Gerome Taylor*
Reverse transcriptase, additionally called RNA-coordinated DNA polymerase, a chemical encoded from the hereditary material of retroviruses that catalyzes the record of retrovirus RNA (ribonucleic corrosive) into DNA (deoxyribonucleic corrosive).. Read More»
- Genet. Mol. Res. 20(4):
Chromosome variations and diversity of Epidendrum ibaguense Lindl. (Orchidaceae) on the Tepequ�©mâ��s Tepuy, Roraima, Brazil
Authors: S.R. N�³brega, A.L.F. Coelho, C.F. Verola, I.R. Costa, R. Vila�§a, F.J.F. Luz and W.F. Ara�ºjo
Studies addressing chromosome variations have elucidated many points regarding the taxonomy of the Orchidaceae. Epidendrum L. besides being one the largest orchid genera, present remarkable morphological, and inter- and intraspecific chromosome variations. Thus, based on a previous report on flower color variation in individua.. Read More»
- Genet. Mol. Res. 16(3):
- gmr16039754
- DOI:
- 10.4238/gmr16039754
Sex chromosome differentiation in Belostoma (Insecta: Heteroptera: Belostomatidae)
Authors: V.B. Bardella, A.L. Dias, L. Giuliano-Caetano, J.R.I. Ribeiro and R. Da Rosa
Belostoma, a genus of the family Belostomatidae, includes species of great ecological importance as biocontrol agents. Few species of these species have been the subject of cytogenetic analyses. Karyotypic evolution in this genus involves agmatoploidy and simploidy; there are also different sex chromosome systems. We examined two Belostoma species (B. dil.. Read More»
- Genet. Mol. Res. 11(3):
- 2012.May.21.2
- DOI:
- 10.4238/2012.May.21.2
FISH analysis and cytogenetic characterization of male meiotic prophase I in Acricotopus lucidus (Diptera, Chironomidae)
Authors: W. Staiber
In the chironomid Acricotopus lucidus, two cells with quite different chromosome complements arise from the last unequal spermatogonial mitosis, as a consequence of monopolar migration of the so-called germ line limited chromosomes (Ks). The cell receiving all the Ks, in addition to two sets of the regularly segregating somati.. Read More»
- Genet. Mol. Res. 8(4):
- vol8-4gmr664
- DOI:
- 10.4238/vol8-4gmr664
Cytogenetic characterization of Rhamdia quelen (Siluriformes, Heptapteridae) from the Bodoquena Plateau, Mato Grosso do Sul, Brazil
Authors: V.P.O. Moraes, S.S. Cereali, O. Froehlich, A.L. Dias
We made a cytogenetic study of the fish Rhamdia quelen collected from the Bodoquena Plateau, an isolated national park region in Mato Grosso do Sul State, Brazil. The diploid number was 2n = 58, with 36 metacentric + 16 submetacentric + 6 subtelocentric chromosomes. We found one to three B chromosomes, which were metacentric a.. Read More»
- Genet. Mol. Res. 6(3):
Differential characterization of holocentric chromosomes in triatomines (Heteroptera, Triatominae) using different staining techniques and fluorescent in situ hybridization
Authors: A. Morielle-Souza, M.T.V. Azeredo-Oliveira
A comparative study of holocentric chromosomes in the triatomine species Panstrongylus megistus, Rhodnius pallescens and Triatoma infestans was carried out in order to characterize heterochromatin, rDNA active sites and nucleolar proteins. Cytological preparations of seminiferous tubules were stained by silver impregnation, C .. Read More»
- Genet. Mol. Res. 6(3):
Differentiation and evolutionary relationships in Erythrinus erythrinus (Characiformes, Erythrinidae): occurrence and distribution of B chromosomes
Authors: N.F. Martins, M.B. Cioffi, W.P. Troy, J.F. Martinez, O. Moreira-Filho and L.A.C. Bertollo
Erythrinus erythrinus, a Neotropical fish species of the Erythrinidae family, has a wide distribution in South America. Previous cytogenetic analysis showed that this species presents extensive karyotype diversity, with 4 karyomorphs (A-D) described herein. This study investigated the karyotypic structure of 2 new pop.. Read More»
- Genet. Mol. Res. 13(3):
- 2014.February.14.11
- DOI:
- 10.4238/2014.February.14.11
Karyotype and spermatogenesis in Triatoma lenti (Hemiptera: Triatominae), a potential Chagas vector
Authors: K.C.C. Alevi P.P. Mendon�§a M. Succi N.P. Pereira J.A. Rosa M.T.V. Azeredo-Oliveira
All species of Triatominae are susceptible to infection by Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) and consequently, potential insect vectors of Chagas disease. Currently, there are 140 known species of triatomine bugs, which can be grouped into specific species complexes. The species Triatoma lenti (Hemiptera: Triatominae) is found only in B.. Read More»
- Genet. Mol. Res. 11(4):
- 2012.December.17.3
- DOI:
- 10.4238/2012.December.17.3
Molecular sexing of unusually large numbers of Spheniscus magellanicus (Spheniscidae) washed ashore along the Brazilian coast in 2008
Authors: E.C. Reis, R.M. Aires, J.F. Moura, C.A.R. Matias, M. Tavares, P.H. Ott, S. Siciliano and G. L�´bo-Hajdu
There have been few studies on Magellanic penguins (Spheniscus magellanicus). In 2008, these penguins washed ashore along the Brazilian coast in unusually high numbers, some reaching as far as northeast Brazil. As Magellanic penguins show little sexual dimorphism, sex determination by morphological features is not accurate. He.. Read More»
- Genet. Mol. Res. 10(4):
Spermatogenesis and karyotypes of three species of water striders (Gerridae, Heteroptera)
Authors: M.M.U. Castanhole, L.L.V. Pereira, H.V. Souza and M.M. Itoyama
Although they are of economic importance, there have been few cytogenetic studies of the Gerridae (Heteroptera) in Brazil. We examined spermatogenesis (meiosis and spermiogenesis) and nucleolar behavior in three species of the family Gerridae. Brachymetra albinerva and Halobatopsis platensis were found to have a chromosome com.. Read More»
- Genet. Mol. Res. 9(3):
- vol9-3gmr841
- DOI:
- 10.4238/vol9-3gmr841