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| Registros recuperados: 31 | |
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| Francisco,Flávio de O.; Brito,Rute M.; Arias,Maria C.. |
| In the present study we compare genetic characteristics (allele diversity and observed heterozygosity) of microsatellite loci, from three stingless bee species (Plebeia remota Holmberg, Partamona mulata Moure In Camargo and Partamona helleri Friese), amplified by using heterospecific primers originally designed for Melipona bicolor Lepeletier and Scaptotrigona postica Latreille. We analyzed 360 individuals of P. remota from 72 nests, 58 individuals of P. mulata from 58 nests, and 47 individuals of P. helleri from 47 nests. The three species studied showed low level of polymorphism for the loci amplified with primers derived from M. bicolor. However, for the loci amplified with primers derived from S. postica, only P. remota presented low level of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plebeia remota; Partamona mulata; Partamona helleri; Heterozygosity; Polymorphism. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000500011 |
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| Paiva, Suzana de; Universidade Estadual de Maringá; Zawadzki, Claudio Henrique; Universidade Estadual de Maringa; Ruvulo-Takasusuki, Maria Claudia Colla; Universidade Estadual de Maringá; Lapenta, Ana Silvia; Universidade Estadual de Maringá; Renesto, Erasmo; Universidade Estadual de Maringá. |
| Allozyme electrophoresis analysis were performed in four species of Hypostomus (Loricariidae), H. albopunctatus, H. hermanni, H. regani, e Hypostomus sp. 1/NUP 5612 from the Ivaí river, a tributary of the upper Paraná river. The study of 14 loci revealed diagnostic characters and exclusive alleles in a low frequency. The heterozygosity ranged from 0.000 in H. albopunctatus to 0.199 in H. hermanni, which was higher than the heterozygosity in other samples of Hypostomus in literature, as well as in other fish groups. Hypostomus albopunctatus and H. regani revealed higher similarity (I = 0.804), while H. hermanni and Hypostomus sp. 1/NUP 5612 showed the least genetic identity (I = 0.569). All samples were genetically distinguished, despite there were several... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.02.00.00-5 catfish; Heterozygosity; Neotropical fishes; Genetic variability; Siluriformes Genética. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16355 |
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| Glasenapp,Jacqueline Siqueira; Barbosa,Priscila Barros; Casali,Vicente Wagner Dias; Martins,Ernane Ronie; Cruz,Cosme Damião. |
| 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 polymorphic systems PGI, IDH, MDH and GOT demonstrated a dimeric quaternary structure, while EST and PER were monomeric. The total expected genetic diversity (H E) for leaves and seeds were 0.325 and 0.244 respectively. The effective number of alleles per locus (A E) was 1.58 in leaves and 1.42 in seeds. The values of H E and A E observed in S. adstringens were comparatively higher than the average values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allozyme segregation; Genetic diversity; Heterozygosity; Medicinal plants. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000200003 |
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| SILVA, S. M. M.. |
| O conhecimento populacional é fundamental para que as espécies sejam conservadas, manejadas e protegidas. Estudos sobre diversidade genética e estrutura populacional de plantas como os bambus amazônicos (Guadua) dão subsídios para a conservação das espécies tanto in situ quanto ex situ. Plantas nativas como os bambus são um importante componente no contexto florestal, formando ecossistemas únicos, pouco estudados, que servem de abrigo para muitas espécies que vivem relacionadas a eles e também podem ser usados economicamente para diversos fins. Este trabalho teve como objetivo, estudar a diversidade genética e estrutura populacional de quatro populações (P1, P2, P3 e P4) de Guadua aff. chaparensis, localizadas nos municípios de Bujari e Sena Madureira, e... |
| Tipo: Teses |
Palavras-chave: Fitomejoramiento; Guadua aff chaparensis; Guadua aff lynnclarkiae; Variación genética; Similaridade genética; Similitud genética; Sondeo de la Población Actual; Heterozigozidade; Heterocigosidad; Programas de computadores; Análisis por computador; Structure; Bujari (AC); Sena Madureira (AC); Porto Acre (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Melhoramento Genético Vegetal; Bambu; Variação Genética; Levantamento Populacional; Endogamia; Programa de Computador; Análise Comparativa; Plant breeding; Bamboos; Guadua; Genetic variation; Current Population Survey; Inbreeding; Heterozygosity; Genetic similarity; Computer software; Computer analysis. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110082 |
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| Cimmaruta, R; Scialanca, F; Luccioli, F; Nascetti, G. |
| Allozyme electrophoresis has been used to analyse the genetic structure of ten populations of the killifish, Aphanius fasciatus, sampled from Italian coastal brackish lagoons or salterns. The goal of the study was to compare the genetic structure of samples obtained from habitats characterised by environmental stress of different kinds, with the aim of gaining a better understanding of the relationships between the genetic variation of natural populations and environmental disturbance, either natural or man-made. Therefore, the sampling scheme has been planned to provide samples from both brackish habitats, characterised by natural stress with seasonal marked fluctuations of chemical and physical parameters, and from coastal lagoons suffering from a high... |
| Tipo: Text |
Palavras-chave: Aphanius fasciatus; Hétérozygotie; Allozymes; Eaux saumâtres; Stress du milieu; Aphanius fasciatus; Heterozygosity; Allozymes; Brackish waters; Environmental stress. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43290/43025.pdf |
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| Xavier, Keyla Vitoria Marques; Souza, Eden Silva e; Santos, Erick de Aquino; Diniz, Michely Correia. |
| Methanogenic archaeas are found in aquatic and terrestrial environments and are fundamental in the conversion of organic matter into methane, a gas that has a potential use as renewable source of energy, which is also considered as one of the main agents of the greenhouse effect. The vast majority of microbial genomes can be identified by a conservative molecular marker, the 16S ribosomal gene. However, the mcrA gene have been using in studies of methanogenic archaea diversity as an alternative marker, highly conserved and present only in methanogens. This gene allows the expression of the enzyme Methyl-coenzyme M reductase, the main agent in converting by-products of anaerobic digestion into methane. In this context, we aimed to study the genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heterozygosity; Microbiomes; Methane; Anaerobic; Arlerquin; Databases heterozygosity; Microbiomes; Methane; Anaerobic; Arlerquin; Databases.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/49877 |
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| Costa,Cibele Tesser da; Albuquerque,Ana Christina Sagebin; Nascimento Junior,Alfredo do; Marcelino,Francismar Correa; Pereira,Jorge Fernando. |
| The objective of this work was to determine the genetic variability available for triticale (X Triticosecale Wittmack) crop improvement in Brazil. Forty-two wheat genomic microsatellites were used to estimate the molecular diversity of 54 genotypes, which constitute the base of one of the major triticale breeding programs in the country. Average heterozygosity was 0.06 and average and effective number of alleles per locus were 2.13 and 1.61, respectively, with average allelic frequency of 0.34. The set of genomic wheat microsatellites used clustered the genotypes into seven groups, even when the germplasm was originated primarily from only two triticale breeding programs, a fact reflected on the average polymorphic information content value estimated for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: X Triticosecale; Polymorphism information content; Transferability; Heterozygosity; Number of alleles; Frequency of alleles. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001100009 |
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| Santos, Michele Rocha dos; Universidade Estadual de Maringá; Renesto, Erasmo; Universidade Estadual de Maringá. |
| The genetic variability of Oligosarcus paranensis was estimated from a population collected in São Francisco river, Prudentópolis county in Paraná State (Brazil) using the electrophoresis in starch gel technique. Eleven enzymatic systems were analyzed: Aspartate aminotransaminase (AAT; E. C. 2.6.1), Alcohol dehydrogenase (ADH; E. C. 1.1.1.1), Esterase (EST; E. C. 3.1.1.1), Glucose-6-phosphate isomerase (GPI; E. C. 5.3.1.9), Glycerol-3-Phosphate dehydrogenase (G3PDH; E. C. 1.1.1), Isocitrate dehydrogenase (IDH; E. C. 1.1.1.42), L-lactate dehydrogenase (LDH; E. C. 1.1.1.27), Malate dehydrogenase (MDH; E. C. 1.1.1.37 ), Malate dehydrogenase NADP (ME; E. C. 1.1.1.40), Phosphoglucomutase (PGM; E. C. 5.4.2.2) and Sorbitol dehydrogenase (SORB; E.C. 1.1.1.14).... |
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Palavras-chave: Allozyme; Genetic diversity; Heterozygosity; Polymorphism; Pisces. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14179 |
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| Rezende,Judy Ruiz; Renesto,Erasmo; Zawadzki,Cláudio Henrique. |
| The genetic variability of three Gymnotus species from the Caracu stream, a small tributary of the left margin of Paraná River (Brazilian upper Paraná River floodplain), was estimated with data of 17 putative allozyme loci, which were obtained by using corn starch gel electrophoresis of 10 enzymatic systems: Aspartate aminotransferase (E. C. 2.6.1.1), Alcohol dehydrogenase (E. C. 1.1.1.1), Esterase (E. C. 3.1.1.1), Glucose dehydrogenase (E. C. 1.1.1.118), Glycerol-3-phosphate dehydrogenase (E. C. 1.1.1.8), Isocitrate dehydrogenase (E. C. 1.1.1.42), L-Lactate dehydrogenase (E. C. 1.1.1.27), Malate dehydrogenase (E. C. 1.1.1.37), Superoxide dismutase (E. C. 1.15.1.1) and Sorbitol dehydrogenase (E. C. 1.1.1.14). The genetic diversity was estimated as He =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polymorphism; Genetic distance; Allozyme; Heterozygosity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400010 |
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| Paiva,Suzana de; Renesto,Erasmo; Zawadzki,Cláudio Henrique. |
| Hypostomus strigaticeps and two morphotypes of Hypostomus were collected from Ribeirão Maringá, a small tributary of the Rio Pirapó, an effluent of the upper Rio Paraná. The three populations were analyzed by allozyme electrophoresis that allowed the scoring of 25 loci from 14 enzyme systems. Heterozygosity values (He) were 0.028 in H. strigaticeps, 0.027 in Hypostomus sp. 1 and zero in Hypostomus sp. 2. Several diagnostic loci and fixed differences were observed for each population at loci Acp-A, Gcdh-A and Mdhp-A. Thus, all populations were genetically distinct, although there were many common alleles. The unbiased genetic identities of Nei (I) were estimated as 0.780 for Hypostomus sp. 1 and H. strigaticeps, 0.357 for H. strigaticeps and Hypostomus sp.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allozymes; Heterozygosity; Hypostomus; Loricariidae; Systematic. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300005 |
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| Registros recuperados: 31 | |
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