Now showing items 1-10 of 32
Analysis of NOR distribution in cultivated and naturalized stocks of rainbow trout (Oncorhynchus mykiss)
(Genetics and Molecular Biology, 2002-01-01) [Artigo]
In salmonid species, nucleolar organizing regions (NORs) have frequently been found on a single chromosome pair. However, some other, smaller yet active NORs have also been described. In the present study, NORs were found ...
Chromosome Mapping of H1 Histone and 5S rRNA Gene Clusters in Three Species of Astyanax (Teleostei, Characiformes)
(Cytogenetic and Genome Research, 2011-01-01) [Artigo]
We report here on the physical mapping of the H1 histone genes (hisDNA) and the 5S ribosomal DNA (rDNA) in 3 Neotropical fish species of the genus Astyanax (A. altiparanae, A. bockmanni and A. fasciatus) and the comparative ...
Specific probe for supernumerary chromosomes of Prochilodus lineatus (Teleostei, Characiformes, Prochilodontidae) obtained by chromosome microdissection
(Chromosome Research, 2009-05-01) [Resumo]
Chromosomal features of nucleolar dominance in hybrids between the Neotropical fish Leporinus macrocephalus and Leporinus elongatus (Characiformes, Anostomidae)
(Genetica, 2009-11-01) [Artigo]
In the present study, the chromosomal mechanisms of nucleolar dominance were analyzed in the hybrid lineage Piaupara, which resulted from crossing the Leporinus macrocephalus female (Piau double dagger u) and L. elongatus ...
Repetitive DNA probe linked to sex chromosomes in hybrids between Neotropical fish Leporinus macrocephalus and Leporinus elongatus (Characiformes, Anostomidae)
(Cytogenetic and Genome Research, 2009-01-01) [Artigo]
Interspecific hybrids of fish can offer important advances in the zootechnical exploration of this animal group. However, hybrids can pose serious biological risks to the environment and natural populations, making genetic ...
Detection of post-F1 fish hybrids in broodstock using molecular markers: Approaches for genetic management in aquaculture
(Aquaculture Research, 2013-05-01) [Artigo]
Herein, we have developed molecular markers for nuclear genes to use in multiplex-PCR and PCR-RFLP, with the goal of characterising hybrid lines derived from crosses between pintado Pseudoplatystoma corruscans and cachara ...
Identification of hybrids between Neotropical fish Leporinus macrocephalus and Leporinus elongatus by PCR-RFLP and multiplex-PCR: Tools for genetic monitoring in aquaculture
(Aquaculture, 2010-01-07) [Artigo]
Interspecific fish hybrids can represent a serious threat to the aquatic environment. Consequently, genetic monitoring of organisms that are produced by interspecific hybridization aims at the application of methodologies ...
Molecular diagnostic methods for identifying Serrasalmid fish (Pacu, Pirapitinga, and Tambaqui) and their hybrids in the Brazilian aquaculture industry
(Aquaculture, 2011-11-16) [Artigo]
Hybrids of fish obtained by crossing commercial species of the family Serrasalmidae (Pacu, Pirapitinga, and Tambaqui) have been produced on a large scale by the Brazilian aquaculture industry. However, because juvenile ...
Cytogenetic characterization of distinct B chromosomes in a population of the fish Astyanax bockmanni (Teleostei, Characiformes)
(Caryologia, 2012-01-01) [Artigo]
Individuals of Astyanax bockmanni from one population belonging to the Paranapanema River basin, southeastern Brazil, were cytogenetically examined. In the present paper, we report a diploid number of 50 chromosomes, with ...
Interspecific fish hybrids in Brazil: management of genetic resources for sustainable use
(Reviews In Aquaculture, 2012-06-01) [Artigo]
Serrasalmid and pimelodid fish hybrids represent important advances for aquaculture in Brazil, but they also constitute serious genetic risks to cultivated and natural populations. Serrasalmid hybrids (tambacu, tambatinga ...