Allozyme Variation
Mostrando 1-12 de 84 artigos, teses e dissertações.
-
1. Allozyme variation in a natural population of Stryphnodendron adstringens in the Rio Preto State Park, southeastern Brazil
Leaves and fruits from 63 Stryphnodendron adstringens trees were sampled in the Rio Preto State Park to analyze allozyme segregation, tissue specific expression of allozyme loci, and their genetic parameters. The enzyme systems ADH, EST, ACP, PGM, PGI, GDH, G6PDH, GOT, IDH, LAP, MDH, PER and SKDH were assessed by means of starch-gel electrophoresis. The poly
Braz. J. Bot.. Publicado em: 2012
-
2. Isoenzyme variation in the leaf-cutting ants Acromyrmex heyeri and Acromyrmex striatus (Hymenoptera: formicidae)
This is the first study of isoenzyme variability in the leaf-cutting ants (Myrmicinae, Attini) Acromyrmex heyeri (Forel, 1899) and A. striatus (Roger, 1863) which are common throughout the southern Brazilian state of Rio Grande do Sul. We studied the alloenzyme variability of malate dehydrogenase (MDH), α-glycerophosphate dehydrogenase (α-GPDH) and amylase
Publicado em: 2010
-
3. Allozyme variation among three populations of the armored catfish Hypostomus regani (Ihering, 1905) (Siluriformes, Loricariidae) from the Paraná and Paraguay river basins, Brazil
Three Brazilian populations of the armored catfish Hypostomus regani (Ihering, 1905) were sampled, one from the Corumbá Reservoir in Goiás state, another from the Itaipu Reservoir in Paraná state and a third from the Manso Reservoir in Mato Grosso state. Allozyme electrophoresis was used to establish the genetic structure of the species, with the analysis
Genetics and Molecular Biology. Publicado em: 2008
-
4. Genetic and morphometric differences between yellowtail snapper (Ocyurus chrysurus, Lutjanidae) populations of the tropical West Atlantic
Populations of Ocyurus chrysurus were compared genetically and morphometrically along the West Atlantic coast to test the null hypothesis of population homogeneity in the area. Brazilian populations were found to be differentiated in shape (canonical variates analysis; F[48,515] = 10.84, p < 0.0001). Analyses of mitochondrial DNA sequences (663 bp of the con
Genetics and Molecular Biology. Publicado em: 2008
-
5. Allozyme variation and sociogenetic structure of Polistes satan Bequaert 1940 colonies (Hymenoptera, Vespidae)
We collected 40 colonies of the wasp Polistes satan in November 1993 (Population A = 23 colonies) and October 1995 (Population B = 17 colonies) from the town of Delfinopólis in the Brazilian state of Minas Gerais. Pupae from these nests were used to assess allozyme variation and genetic relatedness among nestmates. Of the 24 gene loci sampled six showed all
Genetics and Molecular Biology. Publicado em: 2007-03
-
6. Genetic variation in populations of Gochnatia pulchra (Asteraceae) / Analise da variabilidade genetica em populações de Gochnatia pulchra (Asteraceae)
The brazilian cerrado is one of the most threatened biomes of tropical savannas in the world, subject to habitat fragmentation, loss and degradation. Gochantia pulchra Kunth (Asteraceae, Mutisieae) is a perennial shrub species endemic and to the brazilian cerrado. Its commonly found in human disturbed cerrado sites. In the presente work, we studied eight pop
Publicado em: 2007
-
7. Allozymic variation and differentiation in the chilean blue mussel, Mytilus chilensis, along its natural distribution
Genetic differentiation in the Chilean blue mussel Mytilus chilensis (Hupé 1854) was investigated based on the variation in the allozyme frequencies of Pgm, Gpi, Icd, Me, Gsr, Lap and Pep in eight samples collected along 1800 km from Arauco (VIII Region) to Punta Arenas (XII Region). Despite the large geographic separations, values of Neis unbiased genetic
Genetics and Molecular Biology. Publicado em: 2006
-
8. Genetic structure and chemical defenses variaton in Brugmansia suaveolens (Solanaceae) / Estruturação genetica e variação de defesas quimicas em Brugmansia suaveolens (Solanaceae)
Populations patchily distributed tend to show high genetic structure and strong micro-evolutionary process evidences. Brugmansia suaveolens (Solanaceae) individuals are restrict to population patches. In this work, the genetic diversity of nine B. suaveolens populations was estimate by means of allozyme electrophoresis (chapter 1). Our results indicate high
Publicado em: 2006
-
9. Variabilidade genetica e estrutura de populações de Cochliomyia hominivorax (Diptera: Calliphoridae) : uma nova perspectiva atraves de marcadores microssatelites / Genetic diversity and population structure in the new world screw-worm, Cochliomyia hominivorax (Diptera: Calliphoridae), as revealed by microsatellite markers
The cultural and economic importance of animal production in South America dates back to the colonial era. This continent has one of the largest percentages of the world s total cattle population and countries like Brazil, Argentina and Uruguay play a major role as exporters of a variety of livestock products. Diseases affecting livestock can have a signific
Publicado em: 2006
-
10. Populational genetic structure and sociogenetic structure of cocoon masses of Digelasinus diversipes (Kirby, 1882) (Hymenoptera: Symphyta: Argidae)
Gene variation and population genetic structure of the Neotropical sawfly Digelasinus diversipes were measured by allozyme analyses using starch gel electrophoresis. Cocoon masses were collected in Eugenia glazioviana (Myrtaceae) stems, in two areas of the "Estação Ecológica Jataí" (Luiz Antônio, SP, Brazil - 21°25' S, 47°50' W), in 2000 and 2001. The
Genetics and Molecular Biology. Publicado em: 2004
-
11. The genetics and conservation of Araucaria angustifolia: I. Genetic structure and diversity of natural populations by means of non-adaptive variation in the state of Santa Catarina, Brazil
The objective of this study was to generate information relative to the allele distribution and dynamics within and among populations of Araucaria angustifolia, a naturally-occurring conifer in the south of Brazil, being known popularly as "pinheiro-do-Paraná", "araucaria" or pine tree. In order to elucidate the levels and the distribution of the genetic va
Genetics and Molecular Biology. Publicado em: 2002
-
12. Molecular and Phenotypic Variation of the Zw Locus Region in Drosophila Melanogaster
Restriction map polymorphism in a 13-kb region of the Zw locus in Drosophila melanogaster was investigated for 64 X chromosome lines with seven 6-cutter and ten 4-cutter restriction enzymes. A total of 203 restriction sites were scored, of which 20 were found to be polymorphic. The estimated nucleotide variation for this region for overall data (π = 0.003 a