Consulta: creatorFacets:"Lopera-Barrero,Nelson Mauricio"
Registros recuperados: 9
Data/hora: 08/06/2024 11:37:51

Caracterização genética de gerações de tilápia Gift por meio de marcadores microssatélites
Provedor de dados: 86
Autores: Rodriguez-Rodriguez,Maria Del Pilar; Lopera-Barrero,Nelson Mauricio; Vargas,Lauro; Albuquerque,Daniele Menezes; Goes,Elenice Souza dos Reis; Prado,Odimari Pricila Pires do; Ribeiro,Ricardo Pereira.
O objetivo deste trabalho foi caracterizar a variabilidade genética nos parentais (G0) e em três gerações consecutivas (G1, G2 e G3) de tilápia Gift (genetically improved farmed tilapia), por meio de marcadores microssatélites. Trezentos e sessenta indivíduos, provenientes do programa de melhoramento da Universidade Estadual de Maringá, foram selecionados quanto ao ganho de peso. O total de 21 alelos foi encontrado nos cinco loci microssatélites polimórficos (G12292, UNH140; G12311, UNH159; G12312, UNH160; G12314, UNH162; e G12315, UNH163), com número médio entre três e cinco alelos por locus. As frequências alélicas variaram de 0,017 (UNH160 - G2) a 0,750 (UNH160 - G0). A heterozigosidade média observada foi de 0,501, 0,391, 0,531 e 0,503 para G0, G1, G2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oreochromis niloticus; Coeficiente de endogamia; Frequência alélica; Tilapicultura; Variabilidade genética.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001000010

Diversidad genética de piracanjuba usada en programas de repoblación con marcadores microsatélites
Provedor de dados: 86
Autores: Rodriguez-Rodriguez,Maria del Pilar; Lopera-Barrero,Nelson Mauricio; Ribeiro,Ricardo Pereira; Povh,Jayme Aparecido; Vargas,Lauro; Sirol,Rodolfo Nardez; Jacometo,Carolina Bespalhok.
El objetivo de este trabajo fue estimar la diversidad genética de un lote de Brycon orbignyanus usado en programas de repoblación, a través de marcadores microsatélites. Se analizaron muestras de 44 reproductores, de 70 larvas y de 69 alevinos, con la amplificación de cinco loci descritos para Brycon opalinus. El número de alelos, la heterozigosidad observada (Ho) y esperada (He), el índice de Shannon (IS), la diversidad genética de Nei (DGN), el coeficiente de endogamia (Fis), la distancia (DG) e identidad genética (IG), el número efectivo de alelos, el test del equilibrio de Hardy-Weinberg (EHW) y el desequilibrio de ligación fueron calculados. Reproductores y progenie tuvieron un número similar de alelos en los loci evaluados. La Ho media, IS, DGN, DG e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brycon orbignyanus; Alevino; Genética de la conservación; Larva; Manejo reproductivo; Variabilidad genética.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000100008

Diversidade genética de pacu do Rio Paranapanema e do estoque de um programa de repovoamento
Provedor de dados: 86
Autores: Povh,Jayme Aparecido; Ribeiro,Ricardo Pereira; Sirol,Rodolfo Nardez; Streit Júnior,Danilo Pedro; Lopera-Barrero,Nelson Mauricio; Vargas,Lauro; Gomes,Patrícia Cristina; Lopes,Taís da Silva.
O objetivo deste trabalho foi estudar a diversidade genética das amostras de pacu do médio Rio Paranapanema e do estoque de reprodutores utilizado no programa de repovoamento da Estação de Aqüicultura e Hidrologia da usina hidrelétrica Duke Energy, por meio do marcador RAPD. Foram utilizados 14 primers para analisar 30 indivíduos capturados no médio Rio Paranapanema e 29 indivíduos do estoque de reprodutores. O índice de diversidade genética de Shannon e a percentagem de fragmentos polimórficos foram superiores nos indivíduos capturados do Rio Paranapanema. A similaridade genética foi maior nos indivíduos do estoque de reprodutores. A análise da variância molecular mostrou que a maior parte da variação está dentro de cada grupo (84,2%) e não entre os...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; RAPD; Marcador molecular; Variabilidade genética.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000200007

Multivariate analysis using morphometric and ultrasound information for selection of tilapia (Oreochromis niloticus) breeders
Provedor de dados: 96
Autores: Oliveira,Sheila Nogueira de; Ribeiro,Ricardo Pereira; Oliveira,Carlos Antonio Lopes de; Lopera-Barrero,Nelson Mauricio; Borquis,Rusbel Raul Aspilcueta; Zardin,Aline Mayra da Silva Oliveira; Souza,Felipe Pinheiro de; Poveda-Parra,Angela Rocio.
ABSTRACT This study evaluated morphometric and ultrasound information of tilapia (O. niloticus) breeders through multivariate analysis. We applied correlation, clustering, and principal component analysis to a dataset composed of information from 222 male and female breeders of the improved GIFT strain. The body weight, objective of the breeding program, showed a high positive correlation with most of the morphometric parameters. The formation of clusters indicated characteristics responsible for muscle composition and carcass weight. Some characteristics showed a high correlation, such as body weight and fillet weight (0.98 and 0.94 for females and males, respectively), and a high contribution to the explanation of data variability; of the total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Breeding; Fish farming; Oreochromis sp.; Phenotypic selection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100151

Microsatellite analysis of pacu broodstocks used in the stocking program of Paranapanema River, Brazil
Provedor de dados: 63
Autores: Povh,Jayme Aparecido; Ribeiro,Ricardo Pereira; Lopera-Barrero,Nelson Mauricio; Jacometo,Carolina Bespalhok; Vargas,Lauro; Gomes,Patrícia Cristina; Lopes,Taís da Silva.
Monitoring the genetic diversity has fundamental importance for fish stocking programs. This experiment aims to evaluate the genetic diversity in two hatchery stations (A and B) with pacu Piaractus mesopotamicus (Holmberg, 1887) in Andirá, state of Paraná, Brazil used in stocking programs of Paranapanema River. Six microsatellite loci were amplified using DNA extracted from 60 fin-clipping samples. The broodstock B had the average number of alleles and the mean heterozygosity (alleles: 3.7 and H O: 0.628) higher than the broodstock A (alleles: 3.5 and H O: 0.600). Alleles with low frequency levels were observed in the both broodstocks. The positive coefficients of endogamy in the locus Pme2 (broodstock A: F IS = 0.30 and broodstock B: F IS = 0.20), Pme5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piaractus mesopotamicus; Genetic variability; Hatchery stations; Molecular markers.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300006

Microsatellite analysis of the parental contribution of Piaractus mesopotamicus to the production of offspring in the semi-natural system of reproduction
Provedor de dados: 52
Autores: Povh,Jayme Aparecido; Ribeiro,Ricardo Pereira; Sirol,Rodolfo Nadez; Streit Jr.,Danilo Pedro; Moreira,Heden Luiz Marques; Siewerdt,Frank; Lopera-Barrero,Nelson Mauricio; Mangolin,Claudete Aparecida; Vargas,Lauro.
The objective of this study was to evaluate the genetic diversity and the parental contribution of Piaractus mesopotamicus in the production of offspring in the semi-natural system of reproduction. Twenty parental fishes (eleven males and nine females) and the total of 100 larvae were evaluated by microsatellite marker. The parents and offspring had thirty-one alleles and heterozygosity of 0.550 and 0.563, respectively. The females were fertilised by two up to six males while the males fertilised three up to five females. The contribution of the females and males to the offspring were 66.6 and 58%, respectively. Such results indicated no loss in the genetic variability in the offspring, and the parents had multiple paternity and reasonable contribution to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variability; Stock enhancement programme; Reproductive management.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200018

Ovopel and Carp Pituitary Extract as Spawning Inducers in Males of the Amazon Catfish Leiarius marmoratus (Gill, 1970)
Provedor de dados: 52
Autores: Araújo,João Ênio Xavier Souza; Streit Jr,Danilo Pedro; Ribeiro,Janessa Sampaio de Abreu; Martins,Edenilce de Fátima Ferreira; Souza,Francielle Novaes; Oliveira,Carlos Antonio Lopes de; Ribeiro,Ricardo Pereira; Lopera-Barrero,Nelson Mauricio; Povh,Jayme Aparecido.
The objective of this study was to evaluate Ovopel and carp pituitary extract as spawning inducers in the males of the Amazon catfish L. marmoratus. The following treatments, applied in a single dose, were studied: 0.2, 0.4 and 0.6 Ovopel pellet/kg live weight, and 2.5 mg carp pituitary extract/kg live weight. Each treatment was repeated four times. No significant difference in sperm volume, motility and vigor, time of motility, sperm count, or percentage of normal and abnormal spermatozoa was observed between the treatments. There was also no significant difference in terms of primary or secondary sperm defects, except for the secondary defect of loose heads, which was less frequent in the treatments using 0.4 and 0.6 Ovopel pellet/kg live weight. It was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish breeding; Hypophysation; Semen of fish.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000600882

Cross-amplification of heterologous microsatellite markers in Piracanjuba
Provedor de dados: 65
Autores: Castro,Pedro Luiz de; Ribeiro,Ricardo Pereira; Santos,Silvio Carlos Alves dos; Goes,Elenice Souza dos Reis; Souza,Felipe Pinheiro de; Poveda-Parra,Angela Rocio; Vargas,Lauro; Urrea-Rojas,Angela Maria; Lopera-Barrero,Nelson Mauricio.
ABSTRACT: Brycon orbignyanus, popularly known in Brazil as piracanjuba, is a fish with great economic value but whose natural population drastically decreased in number during the last years. In this context, genetic variability studies of natural stocks and in restocking programs are fundamental for the adoption of conservation measures. Current analysis verifies the cross-amplification of heterologous primers in B. orbignyanus. Fifty-two primers of the species Brycon opalinus, Brycon hilarii, Brycon insignis, Prochilodus sp., Piaractus mesopotamicus, Colossoma macropomum and Oreochromis niloticus were tested. Primers with the best reproducibility were applied to a sample of 20 individuals and the genetic parameters were calculated. Nine primers provided...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brycon orbignyanus; Conservation; Molecular markers; Heterologous primers.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001200402

Transferability of heterologous microsatellite primers in Brycon gouldingi
Provedor de dados: 65
Autores: Souza,Felipe Pinheiro de; Lima,Ed Christian Suzuki de; Leite,Natalia Gonçalves; Urrea-Rojas,Angela Maria; Yamachita,Andrei Lincoln; Pandolfi,Victor César Freitas; Lopera-Barrero,Nelson Mauricio.
ABSTRACT:  Brycon gouldingi is a species of neotropical fish of socioeconomic and environmental importance in the Tocantins-Araguaia Basin. Genetic studies on this species are still limited, making it difficult to evaluate the population structure and genetic diversity in natural and captive stocks. Here, we aimed to evaluate the transferability of heterologous microsatellite primers in B. gouldingi. A total of 30 primers for eight species were evaluated: Brycon hilarii, Brycon opalinus, Brycon cephalus, Brycon orbignyanus, Prochilodus lineatus, Prochilodus argenteus, Piaractus mesopotamicus, and Colossoma macropomum. The primers that showed the best amplification patterns were applied to 20 specimens of B. gouldingi, and their genetic parameters were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Cross-amplification; Molecular markers; SSR.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001100406