Consulta: creatorFacets:"Sereno,José Robson Bezerra"
Registros recuperados: 10
Data/hora: 03/06/2024 11:32:26

DNA testing for parentage verification in a conservation nucleus of Pantaneiro horse
Provedor de dados: Genetics and Molecular Biology
Autores: Sereno,Fabiana Tavares Pires de Souza; Sereno,José Robson Bezerra; Vega-Pla,Jose Luis; Delgado,Juan Vicente.
We investigated the genealogy of the in situ conservation nucleus of the Pantaneiro horse using DNA microsatellites by evaluating 101 horses, the group consisting of 71 adult horses (3 stallions, 40 male and 31 mares) and 27 foals (14 colts and 13 fillies). Genomic DNA was extracted from hair roots and genotyped using 12 microsatellite markers (AHT4, AHT5, ASB2, ASB17, ASB23, HMS3 HMS6, HMS7, HTG4, HTG10, LEX33 and VHL20). The number of alleles per locus varied from 6 to 13, with a mean of 7.8 and the expected heterozygosity ranged from 0.544 to 0.734 (mean 0.644). The VLH20, ASB2, HTG10, ASB23 markers had a high (&gt; 0.8) polymorphism information content and the total exclusion probability of the 12 microsatellite loci was 0.99. The genealogical study of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Pantaneiro horse; Animal conservation; Microsatellites; Markers; Parentage verification.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100013

Estimativa de la edad y peso a la primera monta de novillas en el Pantanal brasileño
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Sereno,José Robson Bezerra; Pellegrin,Aiesca Oliveira; Lara,Maria Aparecida Cassiano; Abreu,Urbano Gomes Pinto de; Sereno,Fabiana Tavares Pires de Souza; Chalita,Liciana Vaz de Arruda Silveira.
Esto trabajo tuvo como objetivo estimar la edad y peso a la primera monta de novillas de las razas Nelore (N), Pantaneira (P) y Mestizas Pantaneira x Nelore (PxN). Se utilizó un total de 98 hembras, siendo 51, 24 y 23 pertenecientes a las razas N, P y PxN, respectivamente. El análisis estadístico de los datos no reveló diferencia significativa (P = 0,3595) para el peso a la primera monta entre las razas estudiadas. El análisis de varianza no reveló diferencia significativa (P = 0,307) entre las edades a la primera monta entre razas, mostrando 3,5, 3,4 y 3,2 años para las novillas P, N y ½PxN, respectivamente.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Mejora genética animal; Razas mestizas; Recursos genéticos animales.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001200014

Emergência de Haematobia Irritans nas massas fecais de bovinos das raças Nelore e Pantaneira no pantanal mato-grossense
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Sereno,Fabiana Tavares Pires de Souza; Sereno,José Robson Bezerra.
Este trabalho foi realizado na Fazenda Nhumirim de propriedade da Embrapa-Centro de Pesquisa Agropecuária do Pantanal, em Corumbá, MS, no período de 11/93 a 05/94, com coletas mensais de massas fecais de bovinos das raças Nelore e Pantaneira, com o objetivo de comparar o número de moscas-do-chifre nas duas raças e determinar qual das duas exerce maior atração sobre a mosca-do-chifre (Haematobia irritans). De 112 fezes bovinas recolhidas de cada raça, observou-se que em Nelore, 107 (95,5%) massas fecais apresentavam pupas de dípteros, e apenas 72 (64,3%) tinham pupas de H. irritans; na raça Pantaneira, das 105 (94,0%) massas fecais com pupas de dípteros apenas 60 (53,6%) apresentavam H. irritans. Os resultados das medições comparativas dos parâmetros...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Controle biológico; Moscas.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000900022

Genetic diversity of Brazilian Pantaneiro horse and relationships among horse breeds
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Sereno,Fabiana Tavares Pires de Souza; Sereno,José Robson Bezerra; Vega-Pla,Jose Luis; Kelly,Lucy; Bermejo,Juan Vicente Delgado.
The objective of this work was to evaluate the genetic diversity of Brazilian Pantaneiro horse by microsatellite markers, investigate the effect of genetic bottlenecks and estimate genetic differentiation among four horse breeds. Genetic variation was estimated through allele frequencies and mean breed heterozygosity. Nei's genetic distances among the breeds Pantaneiro, Thoroughbred, Arabian, Spanish Pure Breed (Andalusian), and Uruguay Creole were calculated, and it was used to construct an UPGMA dendrogram. Clustering at different K values was calculated to infer population structure and assign individuals to populations. Nei's distances showed a minimum distance between Pantaneiro horse and Spanish Pure Breed (0.228), and similar distances from Spanish...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Equus caballus; Animal conservation; Molecular markers; Microsatellites; Genetic resources conservation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000500007

Cytogenetic and molecular analysis of the Pantaneiro cattle breed
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Issa,Érica Cunha; Jorge,Wilham; Sereno,José Robson Bezerra.
The objective of this work was to characterize Pantaneiro cattle genetically through its paternal ancestry by the morphology of the Y chromosome, whether submetacentric or acrocentric, as well as to identify the maternal ancestry through mitochondrial DNA. The karyotype and mitochondrial DNA of 12 bulls of Pantaneiro breed were analyzed. The Y chromosome was analyzed in lymphocyte metaphases and the mitochondrial DNA by diagnosing its haplotype (Bos taurus and Bos indicus). Among Pantaneiro animals analyzed three had a taurine (submetacentric) Y and nine had a zebuine (acrocentric) Y chromosome, suggesting breed contamination by Zebu cattle, once Pantaneiro is considered to be of European origin. The mitochondrial DNA was exclusively of taurine origin,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos taurus taurus; Bos taurus indicus; Y chromosome; Mitochondrial DNA.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001100006

Reduction of the bull: cow ratio in the Brazilian Pantanal
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Sereno,José Robson Bezerra; Costa e Silva,Eliane Vianna da; Mores,Cristiano Mougenot.
This work was conducted to study alternatives for reduction of the bull:cow ratio in the Brazilian lowland and, therefore, lower the production costs for the local beef cattle industry. The ratios 1:10, 1:25, and 1:40 were used in native pastures with a mean stocking rate of 0.27 mature animal unit per hectare over two consecutive breeding seasons. Statistical analysis did not show any effect (P&gt;0.05) of year (P = 0.2097), animal category (P = 0.0773), bull:cow ratio (0.8134) on reproductive performance. However, the pregnancy rate in a multiple bull system was higher (P = 0.0228) than in the individual bull system. An evaluation of the economic impact of this management system in the extensive Lowland herds showed that at the ratio of 1:10 the bulls...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Livestock management; Production costs; Animal production.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001200019

Weight and age at puberty and their correlations with morphometric measurements in crossbred breed Suffolk ewe lambs
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Ferra,Janine de Campos; Cieslak,Silvia; Sartori Filho,Roberto; McManus,Connie; Martins,Carlos Frederico; Sereno,José Robson Bezerra.
The objective of this study was to identify and to correlate parameters that characterize puberty and estimate the age and weight of Suffolk ewe lambs in Mato Grosso do Sul. This study was carried out with twenty-two Suffolk ewe lambs for 256 days. Blood samples were collected from the jugular vein and centrifugated and the plasma were stored at -20°C until analysis of progesterone (P4) concentration by radioimmunoassay (RIA). The morphometric measurements included: head length and width, body length, elbow height, chest perimeter, back-sternal diameter, croup length, width and height, cannon bone perimeter and shoulder and hip width, using a tape. The animals became pubertal when the plasma progesterone concentration was &gt;1.0 ng/mL, at 34.1 ± 5.2 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chest perimeter; Progesterone; Radioimmnunoassay; Sheep.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000100018

Maternal offspring behaviour in Curraleiro Pé Duro naturalized cattle in Brazil
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Castanheira,Marlos; McManus,Concepta Margaret; Paula Neto,João Batista de; Costa,Mateus José Rodrigues Paranhos da; Mendes,Francisco Dyonísio Cardoso; Sereno,José Robson Bezerra; Bértoli,Cláudia Damo; Fioravanti,Maria Clorinda Soares.
The objective of the present study consisted of describing dam and calf suckling behaviour of Curraleiro Pé Duro cattle. In this study, 38 mother-offspring pairs and one mother-offspring-orphan trio were observed for 10 hours daily during three consecutive days spaced every four months over a period of one year. After identification, the animals were observed under field conditions where calf posture and the number of suckling episodes (NS), mean suckling duration (MSD), total suckling duration per day (TSD) as well as natural weaning of these animals were recorded. The model assessed the effects of calf sex and age as well as feeding time. Suckling episodes (70.6%) had a duration of one to five minutes and the calf that suckled in the inverted parallel...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allo-suckling; Extensive conditions; Naturalized breeds.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800008

Cattle farmers: profile and speech content analysis while undergoing training to adopt artificial insemination in Goiás State, Brazil
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Gordo,João Maurício Lucas; Silva,Marcelo Corrêa da; Solano,Gianice de Almeida; Lopes,Fernando Brito; Costa,Marcos Fernando Oliveira e; Rocha,Francisco Eduardo de Castro; Fioravanti,Maria Clorinda Soares; Sereno,José Robson Bezerra.
This study was undertaken to verify major issues present in the discourse of cattle farmers when discussing the use of artificial insemination (AI). Seventy-one beef and dairy cattle farmers in the state of Goiás, Brazil, were interviewed using semi-structured questionnaires during AI training courses in 2010 and 2011. Data analyses were done using the classic method of textual speech content analysis, performing the pre-analytical, analytical and inferential stages. The written questions were separated in elementary context units (ECU) and sorted into similar thematic groups. These groups originated categories and subcategories, which were nominated based on an a posteriori criteria. Overall, personal motivation was the main issue characterizing discourse...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal reproduction; Biotechnology; Discourse analysis; Social psychology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300003

Nascimento de bezerros normais após inseminação artificial utilizando espermatozóides criopreservados obtidos de epidídimos refrigerados de bovinos após a morte
Provedor de dados: Ciência Rural
Autores: Costa,Priscila de Melo; Martins,Carlos Frederico; Franco,Vanessa de Oliveira; Rezende,Luiz Osvaldo Fonseca; Sereno,José Robson Bezerra; Campos,Haroldo da Costa Ferreira.
O objetivo deste estudo foi avaliar as características morfológicas e funcionais dos espermatozóides bovinos recuperados de epidídimos resfriados por longos períodos e posteriormente criopreservados. Testículos bovinos foram coletados no abatedouro, transportados ao laboratório e armazenados a 5°C por 0, 24, 48 e 72 horas (n=10 para cada tratamento). Os espermatozóides foram extraídos de cada epidídimo, avaliados e diluídos em meio tris-gema-glicerol a 7% e criopreservados em nitrogênio líquido. As características morfológicas e funcionais dos espermatozóides foram avaliadas in vitro por análise microscópica e in vivo, por meio de inseminação artificial. Foram observadas alterações morfológicas características da imaturidade dos espermatozóides e redução...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animais mortos; Biotecnologia; Germoplasma.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000500022