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Mostrando ítems 21-30 de 1993
Distribution of the Bari-I transposable element in stable hybrid strains between Drosophila melanogaster and Drosophila simulans and in Brazilian populations of these species
(Sociedade Brasileira de Genética, 2007-01-01)
We analyzed the distribution of the Bari-I transposable element in Drosophila melanogaster (IN(1)AB), its sibling species Drosophila simulans (C167.4) and in eight hybrid strains derived from initial crosses involving D. ...
Paternity study of an interspecific natural hybrid of the genus Eucalyptus L'Hér (Myrtaceae) based on cytogenetic data
(2001-12-01)
Three species of the genus Eucalyptus (E. dunni, E. grandis, E. saligna) and interspecific hybrid were studied cytogenetically. The Eucalyptus species and the hybrid showed a symmetrical karyotype with 2n=22 chromosomes, ...
Synaptonemal complex analysis in the fish species Piaractus mesopotamicus and Colossoma macropomum, and in their interspecific hybrid
(2002-01-01)
The surface-spreading technique for visualization of whole cell synaptonemal complex (SC) complements was employed to study the chromosome synapsis in spermatocytes of P. mesopotamicus, C. macropomum and in their interspecific ...
Detection of hybrids and genetic introgression in wild stocks of two catfish species (Siluriformes: Pimelodidae): The impact of hatcheries in Brazil
(Elsevier B.V., 2012-08-01)
Molecular markers (Multiplex-PCR and PCR-RFLP of nuclear and mitochondrial genes) were used to assess the frequency of hybrids in wild stocks of two catfish species: Pseudoplatystoma corruscans and Pseudoplatystoma ...
Cytogenetic mapping of H1 histone and ribosomal RNA genes in hybrids between catfish species Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum
(2013-01-01)
A physical chromosome mapping of the H1 histone and 5S and 18S ribosomal RNA (rRNA) genes was performed in interspecific hybrids of Pseudoplatystoma corruscans and P. reticulatum. The results showed that 5S rRNA clusters ...
Phylogenetic evidence based on Trypanosoma cruzi nuclear gene sequences and information entropy suggest that inter-strain intragenic recombination is a basic mechanism underlying the allele diversity of hybrid strains
(Elsevier B.V., 2012-07-01)
The diversity of Trypanosoma cruzi is categorized into six discrete typing units (DTUs) T. cruzi I to VI. Several studies indicate that T. cruzi I and II are ancestors of T. cruzi which are considered products of independent ...
Haematological characteristics of Brazilian Teleosts: III. Parameters of the hybrid tambacu (Piaractus mesopotamicus Holmberg x Colossoma macropomum Cuvier) (Osteichthyes, Characidae)
(Sociedade Brasileira de Zoologia, 2000-12-01)
Fifty six specimens of the hybrid tambacu (Piaractus mesopotamicus Holmberg, 1887 male x Colossoma macropomum Cuvier, 1818 female) were collected from fishfarm of Guariba, São Paulo, to evaluate their haematology. Fishes ...
Self-supported bacterial cellulose/boehmite organic-inorganic hybrid films
(Springer, 2012-08-01)
Self-supported organic-inorganic hybrid transparent films have been prepared from bacterial cellulose and boehmite. SEM results indicate that the BC membranes are covered by Boehmite and XRD patterns suggest structural ...
Distributed feedback multipeak laser emission in Rhodamine 6G doped organic-inorganic hybrids
(Springer, 2006-12-01)
Organic-inorganic hybrid materials were prepared from an ureasil precursor (ureapropyltriethoxysilane designated as UPTES) and acrylic acid modified zirconium (IV) n-propoxide. Thin films containing rhodamine 6G (Rh6G) ...
The Impact of Hybridization on the Volatile and Sensorial Profile of Ocimum basilicum L.
(Hindawi Publishing Corporation, 2016)