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Registros recuperados: 30
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Age- and quality-dependent DNA methylation correlate with melanin-based coloration in a wild bird ArchiMer
Soulsbury, Carl D.; Lipponen, Anssi; Wood, Kristie; Mein, Charles A.; Hoffman, Joseph I.; Lebigre, Christophe.
Secondary sexual trait expression can be influenced by fixed individual factors (such as genetic quality) as well as by dynamic factors (such as age and environmentally induced gene expression) that may be associated with variation in condition or quality. In particular, melanin-based traits are known to relate to condition and there is a well-characterized genetic pathway underpinning their expression. However, the mechanisms linking variable trait expression to genetic quality remain unclear. One plausible mechanism is that genetic quality could influence trait expression via differential methylation and differential gene expression. We therefore conducted a pilot study examining DNA methylation at a candidate gene (agouti-related neuropeptide: AgRP) in...
Tipo: Text Palavras-chave: AgRP; Coloration; Epigenetics; Heterozygosity; Melanin; Sexual ornament.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00452/56391/58029.pdf
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Alelle number and heterozigosity for microsatellite loci in different stingless bee species (Hymenoptera: Apidae, Meliponini) Neotropical Entomology
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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Allozyme analysis of the four species of Hypostomus (Teleostei: Loricariidae) from the Ivaí river, upper Paraná river basin, Brazil - doi: 10.4025/actascibiolsci.v35i4.16355 Biological Sciences
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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Allozyme variation in a natural population of Stryphnodendron adstringens in the Rio Preto State Park, southeastern Brazil Rev. Bras. Bot.
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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Characterization of 13 microsatellite loci developed from Meconopsis horridula Genet. Mol. Biol.
Zhao,Yu; Zhang,Shi-Bao; Yang,Jing; Zhang,Lu.
Meconopsis horridula is one of the eight most famous flowers in Chinese province of Yunnan. In this study, a modified biotin-streptavidin capture method was used to detect 13 microsatellite markers in the genome of M. horridula. The polymorphism of each locus was assessed in 24 samples collected from four populations. The number of alleles per locus ranged from 2 to 7 (mean: 3.2). The observed and expected heterozygosities ranged from 0.0833 to 0.9167 and 0.0816 to 0.8050, respectively. Additionally, nine of the 13 microsatellite markers were successfully amplified in three other congeneric species. These polymorphic SSR markers could be useful for studying the population genetics of M. horridula and for assessing genetic variation in this and congenerc...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic structure; Heterozygosity; Meconopsis horridula; Microsatellite markers; Polymorphism.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300026
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Decline of genetic variability in a captive population of Pacific white shrimp Penaeus (Litopenaeus) vannamei using microsatellite and pedigree information Electron. J. Biotechnol.
Vela Avitúa,Sergio; Montaldo,Hugo H; Márquez Valdelamar,Laura; Campos Montes,Gabriel R; Castillo Juárez,Héctor.
Background: The objective of this study was to estimate the decline of genetic variability and the changes in effective population size in three shrimp populations. One was a wild population collected at several points in the Mexican Pacific Ocean. The other two populations were different generations (7 and 9) from a captive population selected for growth and survival. Microsatellite markers and pedigree were both used to assess genetic variability and effective population size. Results: Using 26 loci, both captive populations showed a decline in the expected heterozygosity (20%) and allelic diversity indices (48 to 91%) compared to the wild population (P < 0.05). The studied captive populations did not differ significantly from each other regarding...
Tipo: Journal article Palavras-chave: Effective population size; Genetic diversity; Heterozygosity; Microsatellites; Selection; Shrimp.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400009
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Diversidad genética, estructura genética y sistema de cruzamiento en Pinus johannis. Colegio de Postgraduados
García Gómez, Verónica.
Pinus johannis M. F. Robert es una especie endémica de México que se distribuye en poblaciones aisladas en la sierra Madre Oriental. Los objetivos del presente estudio fueron: a) conocer el nivel de diversidad genética y estructura genética de P. johannis; y b) estimar su tasa de cruzamiento. Se utilizaron 143 árboles en cuatro poblaciones de Pinus johannis para estimar los parámetros de diversidad genética tales como número promedio de alelos por locus, porcentaje de loci polimórficos, heterocigosidad observada y esperada. Para calcular la tasa de cruzamiento (t) se utilizó tejido de semilla de 127 árboles. Para conocer la diversidad genética se analizaron nueve sistemas enzimáticos en geles de almidón utilizando electroforesis, y tres para el sistema de...
Palavras-chave: Heterocigosidad; Índice de fijación; Distancia genética; Tasa de cruzamiento; Autofecundación; Heterozygosity; Fixation index; Genetic distance; Outcrossing rate; Selfing.
Ano: 2013 URL: http://hdl.handle.net/10521/2377
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Diversidade genética e estrutura populacional de duas espécies de bambu do gênero Guadua na região sul-ocidental da Amazônia. Repositório Alice
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: Tese/dissertação (ALICE) 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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Examining the cause of high inbreeding depression: analysis of whole-genome sequence data in 28 selfed progeny of Eucalyptus grandis. Repositório Alice
HEDRICK, P. W.; HELLSTEN, U.; GRATTAPAGLIA, D..
2016
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Eucalyptus grandis; Heterozygosity; Heterozygote advantage; Linkage disequilibrium; Pseudo-overdominance; Viability; Tree.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1055388
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Genetic diversity and environmental stress in Italian populations of the cyprinodont fish Aphanius fasciatus ArchiMer
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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Genetic diversity of 16S rRNA and mcrA genes from methanogenic archaeas Biological Sciences
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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Genetic diversity of Brazilian triticales evaluated with genomic wheat microsatellites. Repositório Alice
COSTA, C. T. da; ALBUQUERQUE, A. C. S.; NASCIMENTO JUNIOR, A. do; MARCELINO, F. C.; PEREIRA, J. F..
2007
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: X Triticosecale; Índice de polimorfismo; Transferabilidade; Heterozigosidade; Número efetivo de alelos; Freqüência alélica; Polymorphism information content; Transferability; Heterozygosity; Number of alleles; Frequency of alleles.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/822347
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Genetic diversity of Brazilian triticales evaluated with genomic wheat microsatellites Repositório Alice
COSTA, C.T. da; ALBUQUERQUE, A.C.S.; NASCIMENTO JUNIOR, A. do; MARCELINO, F.C.; PEREIRA, J.F..
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: Artigo em periódico indexado (ALICE) Palavras-chave: X Triticosecale; Polymorphism information content; Transferability; Heterozygosity; Number of alleles; Frequency of alleles; Índice de polimorfismo; Transferabilidade; Heterozigosidade; Número efetivo de alelos; Freqüência alélica.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122827
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Genetic diversity of Brazilian triticales evaluated with genomic wheat microsatellites PAB
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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Genetic structure of bisexual and parthenogenetic populations of Artemia from Italian brackish-hypersaline waters ArchiMer
Nascetti, G; Bondanelli, P; Aldinucci, A; Cimmaruta, R.
Eight populations of Artemia displaying different reproduction modalities (amphigonic vs. parthenogenetic) and ploidies (diploid vs. polyploid) have been collected from Italian salt-works or brackish coastal lagoons, and their genetic structure has been investigated using allozyme electrophoresis. The results obtained on genetic differentiation showed that the Tyrrhenian bisexual samples (A. salina) are genetically homogeneous even between populations located in relatively faraway sites (Sardinia-Latium), having a moderate gene flow assisted by migratory waterfowl. The parthenogenetic samples (A. parthenogenetica) are genetically well differentiated both from the bisexual ones and among them, even when characterised by the same ploidy. Each sample presents...
Tipo: Text Palavras-chave: Artemia; Allozymes; Reproduction amphigonique; Parthénogenèse; Hétérozygotie; Artemia; Allozymes; Amphigony; Parthenogenesis; Heterozygosity.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00322/43289/43024.pdf
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Genetic variability and evidence of founder effect in Hemiodus orthonops (Characiformes: Hemiodontidae) from the upper Paraná River basin, Brazil Biological Sciences
Marques, Liégie Alher; Renesto, Erasmo.
 Hemiodus orthonops is a small fish of the Hemiodontidae family, order Characiformes, with a maximum of 25 cm standard length. Until recently, H. orthonops was an endemic species from the Paraná-Paraguay basin and it was absent from the upper Paraná River basin. Since 2008, it has started to be collected in the upper Paraná River, representing up to 10% of catches. Two population samples of H. orthonops from two localities of the upper Parana River basin (Porto Camargo and Porto Figueira) were analyzed using the allozymes electrophoresis technique. Twenty-one enzymatic loci were detected. The population sample from Porto Camargo displayed a genetic variability (He = 0.1061) higher than that from Porto Figueira (He = 0.0580) and homozygote excess in both of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allozymes; Fish; Genetic distance; Heterozygosity; Protein polymorphism. genética de populações.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31793
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Genetic variability in Oligosarcus paranensis (Teleostei: Characiformes) from the São Francisco river, Ivaí river basin – Paraná State, Brazil - doi: 10.4025/actascibiolsci.v35i3.14179 Biological Sciences
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)....
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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Genetic variability in three species of Gymnotus Linnaeus, 1758 (Gymnotiformes: Gymnotidae) from Caracu stream of the upper Paraná River basin, Brazil Neotropical Ichthyology
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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Genetic variability of Hypostomus (Teleostei, Loricariidae) from the Ribeirão Maringá, a stream of the upper Rio Paraná basin, Brazil Genet. Mol. Biol.
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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Genetic variability of native populations of Wasmannia Forel (Hymenoptera: Formicidae) and their biogeographical implications Neotropical Entomology
Souza,Ana L B; Tavares,Mara G; Serrão,José E; Delabie,Jacques H C.
Wasmannia auropunctata (Roger) and Wasmannia rochai Forel are economically important ants in the Southeast and Southwest regions of Bahia State, Brazil. Randomly Amplified Polymorphic DNA (RAPD) markers were used to distinguish and analyze the genetic variability of populations of both species from Ilhéus, Jequié, BA and French Guyana. The genetic distances among W. auropunctata and W.rochai populations (55.8-71.4%) suggest genetic differentiation among them. Wasmannia auropunctata populations from sugarcane and banana plantations in Jequié were the most distant genetically (30.1-46.3%) and may represent populations restricted to isolated fragments. The high genetic distances among W. auropunctata populations from CEPLAC experimental areas, in Ilhéus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: W. auropunctata; RAPD; Polymorphism; Heterozygosity.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000300013
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