Nucleotide Divergence
Mostrando 1-12 de 504 artigos, teses e dissertações.
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1. The association of very low-density lipoprotein receptor (VLDLR) haplotypes with egg production indicates VLDLR is a candidate gene for modulating egg production
Abstract The very low-density lipoprotein receptor (VLDLR) transports egg yolk precursors into oocytes. However, our knowledge of the distribution patterns of VLDLR variants among breeds and their relationship to egg production is still incomplete. In this study, eight single nucleotide polymorphisms (SNPs) that account for 87% of all VLDLR variants were gen
Genet. Mol. Biol.. Publicado em: 14/07/2016
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2. Molecular evidence of two cryptic species of Stramonita (Mollusca, Muricidae) in the southeastern Atlantic coast of Brazil
Abstract Snails of the genus Stramonita are commonly found in the rocky intertidal habitat of the western Atlantic Ocean coast. They belong to a monophyletic taxon that occurs along the tropical and warm-temperate Atlantic and eastern Pacific rocky shores. This genus comprises different valid species and members of the S. haemastoma complex. In the present s
Genet. Mol. Biol.. Publicado em: 07/07/2016
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3. Genetic analysis reveals candidate species in the Scinax catharinae clade (Amphibia: Anura) from Central Brazil
Abstract Scinax (Anura: Hylidae) is a species-rich genus of amphibians (113 spp.), divided into five species groups by morphological features. Cladistic analyses however revealed only two monophyletic clades in these groups: Scinax catharinae and Scinax ruber. Most species from the S. catharinae clade are found in Atlantic rainforest, except for Scinax canas
Genet. Mol. Biol.. Publicado em: 2016-03
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4. Presence of two mitochondrial genomes in the mytilid Perumytilus purpuratus: Phylogenetic evidence for doubly uniparental inheritance
This study presents evidence, using sequences of ribosomal 16S and COI mtDNA, for the presence of two mitochondrial genomes in Perumytilus purpuratus. This may be considered evidence of doubly uniparental mtDNA inheritance. The presence of the two types of mitochondrial genomes differentiates females from males. The F genome was found in the somatic and gona
Genet. Mol. Biol.. Publicado em: 2015-06
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5. Diferenciação genética e relações filogenéticas entre as linhagens de Microsternarchus (Gymnotiformes: Hypopomidae) na bacia do rio Negro, em função de marcadores moleculares mitocondriais e nucleares
The neotropical electric fish (Order Gymnotiformes) possesses, as one of their main characteristics, the ability to generate and detect alternating electric currents by the action of an electric organ end electroreceptors, respectively. The Electrogenic and Eletrosensory System (EES), allows these fishes to exploit the environment in which they live and to c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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6. Nucleotide diversity and molecular evolution of the WAG-2 gene in common wheat (Triticum aestivum L) and its relatives
In this work, we examined the genetic diversity and evolution of the WAG-2 gene based on new WAG-2 alleles isolated from wheat and its relatives. Only single nucleotide polymorphisms (SNP) and no insertions and deletions (indels) were found in exon sequences of WAG-2 from different species. More SNPs and indels occurred in introns than in exons. For exons, e
Genetics and Molecular Biology. Publicado em: 2011
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7. A high-throughput data mining of single nucleotide polymorphisms in Coffea species expresed sequence tags suggests differential homeologous gene expression in the allotetrapoloid Coffea arabica.
Polyploidization constitutes a common mode of evolution in flowering plants. This event provides the raw material for the divergence of function in homeologous genes, leading to phenotypic novelty that can contribute to the success of polyploids in nature or their selection for use in agriculture. Mounting evidence underlined the existence of homeologous exp
PLANT PHYSIOLOGY. Publicado em: 2011
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8. A high-throughput data mining of single nucleotide polymorphisms in Coffea species expresed sequence tags suggests differential homeologous gene expression in the allotetrapoloid Coffea arabica.
Polyploidization constitutes a common mode of evolution in flowering plants. This event provides the raw material for the divergence of function in homeologous genes, leading to phenotypic novelty that can contribute to the success of polyploids in nature or their selection for use in agriculture. Mounting evidence underlined the existence of homeologous exp
PLANT PHYSIOLOGY. Publicado em: 2011
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9. Genetic structure of the snakehead murrel, Channa striata (channidae) based on the cytochrome c oxidase subunit I gene: influence of historical and geomorphological factors
Nucleotide sequences of a partial cytochrome c oxidase subunit I gene were used to assess the manner in which historical processes and geomorphological effects may have influenced genetic structuring and phylogeographic patterns in Channa striata. Assaying was based on individuals from twelve populations in four river systems, which were separated into two r
Genetics and Molecular Biology. Publicado em: 2011
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10. Isolation, characterization and chromosomal localization of repetitive DNA sequences in Physalaemus ephippifer (Anura Leiuperidae) / Isolamento, caracterização e localização cromossômica de sequências de DNA repetitivo de Physalaemus ephippifer (Anura Leiuperidae)
Previous cytogenetic studies of Physalaemus ephippifer, a species currently allocated to the group P. cuvieri, showed an interesting female-specific chromosome heteromorphism. In 14 females of P. ephippifer, chromosome pair 8 was heteromorphic with regard to the occurrence of an NOR anda terminal C-band. Such heteromorphism was not found in the seven analyze
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2010
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11. Mitochondrial genome nucleotide substitution pattern between domesticated silkmoth, Bombyx mori, and its wild ancestors, Chinese Bombyx mandarina and Japanese Bombyx mandarina
Bombyx mori and Bombyx mandarina are morphologically and physiologically similar. In this study, we compared the nucleotide variations in the complete mitochondrial (mt) genomes between the domesticated silkmoth, B. mori, and its wild ancestors, Chinese B. mandarina (ChBm) and Japanese B. mandarina (JaBm). The sequence divergence and transition mutation rati
Genetics and Molecular Biology. Publicado em: 18/12/2009
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12. Estudo citogenetico e das relações filogeneticas de Engystomops petersi e Engystomops sp. (Anura, Leiuperidae) / Cytogenetics and phylogenetics studies of Engystomops petersi and Engystomops sp. (Anura, Leiuperidae)
The frog Engystomops petersi is widely distributed in the Amazon basin. Genetic divergence and speciation mechanisms of E. petersi populations have been inferred mainly from mitochondria DNA (mtDNA) and microsatellite polymorphisms, male advertisement call and sexual selection. In spite of the significant progress resulting from these studies, many cytogenet
Publicado em: 2009