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Competitiveness levels in cattle herd farms Ciência Rural
Marques,Pedro Rocha; Barcellos,Júlio Otávio Jardim; Dill,Matheus Dhein; Dias,Eduardo Antunes; Azevedo,Eduardo Vaz Torres; Lampert,Vinícius do Nascimento; McManus,Concepta Margaret.
The aim of this experiment was to identify improvement demands for farms with different levels of competitiveness in the west of Rio Grande do Sul state, Brazil. A total of 63 owners of large farms were interviewed (farms with an area greater than 900ha) by applying a semi-structured questionnaire, guided by four drivers: technology (TEC), management (MAN), market relations (MR) and the institutional environment (IE).It was used the Statistical Analysis System 9.2 software to perform the cluster analysis and identify farmers' characteristics. Three random clusters with different levels of competitiveness were observed: low competitiveness level (LCL), middle competitiveness level (MCL) and high competitiveness level (HCL). The 29 variables (sub factors)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster; Level of impact; Management; Ranking; Stratification.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300480
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Determination of metabolizable energy value of corn with different average geometric diameters for european quails (Coturnix coturnix coturnix) BABT
Rezende,Marcelo José de Mello; Torres,Alessandro Figueiredo; Murata,Luci Sayori; Garcia,José Américo Soares; McManus,Concepta Margaret.
Metabolizable energy (ME) of corn with different geometric diameters was determined in European quail with 26 days of age with 124 g of mean live weight, using the Total Collection of Excreta Method. One hundred and twenty five quails were divided in five treatments, five replications with five quails each, with one treatment used to determine endogenous losses. Values of Average Geometric Diameter (AGD) of the corn were 600, 800, 1000 and 1200 µm. ME of corn was not affected by AGD. Average values were 3079, 3274, 3300, 3137 Kcal/kg respectively for apparent metabolizable energy, corrected apparent metabolizable energy, true metabolizable energy, corrected true metabolizable energy.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Metabolizable apparent energy; Metabolizable true energy; Particle size; Total collections of excreta.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400022
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Diagnóstico da deficiência de fósforo em ovinos pela técnica de incorporação de fósforo radioativo nos eritrócitos PAB
Antunes,Dalton Araujo; Louvandini,Helder; Silva Filho,José Cleto da; McManus,Concepta Margaret; Dallago,Bruno Steffano; Machado,Bruno de Oliveira; Mendonça,Dharana Guedes; Correa,Patrícia Spoto.
Este trabalho teve como objetivo avaliar a técnica de incorporação de 32P pelos eritrócitos de ovinos jovens, mantidos em pastejo de Andropogon gayanus, como método de diagnóstico da deficiência de fósforo. Vinte ovinos, com peso vivo inicial de 13,88±2,51 kg, foram divididos em dois tratamentos de dez animais cada; num dos tratamentos, os animais foram suplementados com 3 g de P por animal por dia e, no outro, os animais não receberam suplementação de P. Foram realizadas cinco pesagens dos animais, coletas de sangue e fezes nos 8º, 29º, 43º, 57º e 71º dias do experimento, para avaliar a incorporação de 32P pelos eritrócitos, determinar as concentrações de Ca, glicose e P no soro e a porcentagem de P nas fezes. Foi encontrada diferença significativa na...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Andropogon gayanus; Nutrição animal; Diluição isotópica; Santa Inês; Hemácias; Andropogon gayanus; Animal nutrition; Isotopic dilution; Hair sheep; Haemacytes.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000200020
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D-loop haplotype diversity in Brazilian horse breeds Genet. Mol. Biol.
Ianella,Patrícia; Albuquerque,Maria do Socorro Maués; Paiva,Samuel Rezende; Egito,Andréa Alves do; Almeida,Leonardo Daniel; Sereno,Fabiana T. P. S.; Carvalho,Luiz Felipe Ramos; Mariante,Arthur da Silva; McManus,Concepta Margaret.
Abstract The first horses were brought to Brazil by the colonizers after 1534. Over the centuries, these animals evolved and adapted to local environmental conditions usually unsuitable for exotic breeds, thereby originating locally adapted Brazilian breeds. The present work represents the first description of maternal genetic diversity in these horse breeds based on D-loop sequences. A D-Loop HSV-I fragment of 252 bp, from 141 horses belonging to ten Brazilian breeds / genetic groups (locally adapted and specialized breeds) were analysed. Thirty-five different haplotypes belonging to 18 haplogroups were identified with 33 polymorphic sites. Haplotype diversity (varying from 0.20 to 0.96) and nucleotide diversity (varying from 0.0039 to 0.0239) was lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mitochondrial DNA; Genetic characterization; Equus caballus; Locally adapted breeds; Animal genetic resources.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400604
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Feeding restriction impairs milk yield and physicochemical properties rendering it less suitable for sale Scientia Agricola
Fruscalso,Vilmar; Stumpf,Marcelo Tempel; McManus,Concepta Margaret; Fischer,Vivian.
Feed shortages are relatively frequent in subtropical pasture-based dairy production systems. The effect of feed restriction on milk yield and physical-chemical traits was evaluated in this study. The experiment was carried out in Brazil's south region. Treatments consisted of control and restricted diet. Six multiparous and six primiparous cows, with 499 ± 47.20 kg body weight (BW), at mid-lactation (188 ± 124 days in milk), producing 19.35 ± 4.10 kg of milk were assigned to two groups, balanced for parity, each group receiving a different sequence of the dietary treatments for 56 days, in a crossover design. Diet nominated as control included 8 kg DM 100 kg BW-1 of Bermuda grass var. Tifton pasture (Cynodon dactylon (L.) Pers.), 5.00 kg of concentrate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcohol test; Grazing systems; Milk stability; Underfeeding.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000400003
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Genetic association between longevity and linear type traits of Holstein cows Scientia Agricola
Kern,Elisandra Lurdes; Cobuci,Jaime Araujo; Costa,Cláudio Napolis; McManus,Concepta Margaret; Braccini Neto,José.
Longevity is a desirable trait in the dairy industry because of its relationship to profitability. The aim of this study was to estimate genetic parameters for longevity measurements related to productive life, or life in the herd, and linear type traits of Brazilian Holstein cows born between the years 1990 and 2008. The (co) variance components were estimated by the restricted maximum likelihood method. The heritability for measurements of longevity and linear type traits ranged from 0.05 to 0.07 and 0.08 to 0.39, respectively. The genetic correlations between measurements of longevity and linear type traits ranged from -0.39 to 0.31. Direct selection for longevity does not necessarily lead to long-lived cows, due to low heritability. Indirect genetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic correlation; Mammary system; Productive life; Rear teat placement.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300203
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Genetic characterization of coat color genes in Brazilian Crioula sheep from a conservation nucleus PAB
Cavalcanti,Lilian Cristina Gomes; Moraes,José Carlos Ferrugem; Faria,Danielle Assis de; McManus,Concepta Margaret; Nepomuceno,Alcebiades Renato; Souza,Carlos José Hoff de; Caetano,Alexandre Rodrigues; Paiva,Samuel Rezende.
Abstract: The objective of this work was to identify single nucleotide polymorphisms (SNPs) in resequencing data from MC1R, ASIP, and TYRP1 genes derived from Crioula sheep (Ovis aris) with different coat colors. Polymorphisms in the ASIP (agouti-signaling protein), MC1R (melanocortin 1 receptor), and TRYP1 (tyrosinase-related protein 1) genes were analyzed in 115 sheep from Embrapa’s conservation nucleus of crioula sheep, in Brazil. A total of 7,914 bp were sequenced per animal, and 14 SNPs were identified. Two additional assays were performed to detect duplications and deletions in the ASIP gene. Ninety-five percent of the coat color variation was explained by epistatic interactions observed between specific alleles in the MC1R and ASIP genes. Evidence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ovis aris; ASIP; Genetic resources conservation; Marker-assisted selection; MC1R; TYRP1.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800615
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Genetic parameters for five traits in Africanized honeybees using Bayesian inference Genet. Mol. Biol.
Padilha,Alessandro Haiduck; Sattler,Aroni; Cobuci,Jaime Araújo; McManus,Concepta Margaret.
Heritability and genetic correlations for honey (HP) and propolis production (PP), hygienic behavior (HB), syrupcollection rate (SCR) and percentage of mites on adult bees (PMAB) of a population of Africanized honeybees were estimated. Data from 110 queen bees over three generations were evaluated. Single and multi-trait models were analyzed by Bayesian Inference using MTGSAM. The localization of the hive was significant for SCR and HB and highly significant for PP. Season-year was highly significant only for SCR. The number of frames with bees was significant for HP and PP, including SCR. The heritability estimates were 0.16 for HP, 0.23 for SCR, 0.52 for HB, 0.66 for PP, and 0.13 for PMAB. The genetic correlations were positive among productive traits...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heritability; Genetic correlations; Environmental effects; Apis mellifera.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200011
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Isolation and characterization of mesenchymal stem cells derived from bovine Wharton's jelly and their potential for use in cloning by nuclear transfer Ciência Rural
Silva,Carolina Gonzales da; Martins,Carlos Frederico; Cardoso,Tereza Cristina; Cunha,Elisa Ribeiro da; Bessler,Heidi Christina; McManus,Concepta Margaret; Pivato,Ivo; Báo,Sônia Nair.
ABSTRACT: Wharton's jelly is a source of mesenchymal stem cells (MSCs) that had not yet been tested for bovine embryo production by nuclear transfer (NT). Thus, the objective of this study was to isolate, characterize and test MSCs derived from Wharton's jelly for embryo and pregnancy production by NT in cattle. The umbilical cord was collected during calving and cells derived from Wharton's jelly (WJCs) were isolated by explant and cultured in Dulbecco's Modified Eagle Medium. Skin Fibroblasts (FB) were isolated after 6 months of life. Morphological analysis was performed by bright field and scanning electron microscopy (SEM) during cell culture. Phenotypic and genotypic characterization by flow cytometry, immunocytochemistry, RT-PCR and differentiation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cloning; Mesenchymal stem cell; Umbilical cord.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001830
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Maternal offspring behaviour in Curraleiro Pé Duro naturalized cattle in Brazil R. Bras. Zootec.
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
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Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options Scientia Agricola
Lampert,Vinícius do Nascimento; Canozzi,Maria Eugênia Andrighetto; McManus,Concepta Margaret; Dill,Matheus Dhein; Oliveira,Tamara Esteves de; Mercio,Thomaz Zara; Teixeira,Odilene de Souza; Barcellos,Júlio Otávio Jardim.
ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Brazil. To evaluate the impact of these indicators, equations were derived from a comutational model of herd evolution for estimating the output parameters of the system as follows: productivity per hectare (PH) and offtake rate (COR), as a function of the indicators; calving rate (CR), mating age (AM), age of slaughter (AS) and stocking rate (SR). For this analysis, twenty-seven scenarios (simulation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adoption of technology; Animal production; Management; Stocking rate.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400502
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Validation of a microsatellite panel for parentage testing of locally adapted and commercial goats in Brazil Genet. Mol. Biol.
Silva,Elizabete Cristina da; McManus,Concepta Margaret; Guimarães,Maria Pia Souza Lima Mattos de Paiva; Gouveia,Aurora M.G.; Facó,Olivardo; Pimentel,Daniel M.; Caetano,Alexandre Rodrigues; Paiva,Samuel Rezende.
Brazilian goats are generally kept in small herds and extensive rearing systems, mainly in the northeastern region of the country. Despite production improvement in recent years, the lack of pedigree control has affected genetic progress. This study aimed to validate a panel of 16 microsatellites for parentage testing in locally adapted and commercial goats breeds raised in Brazil, as well as to compare its efficiency with the panel recommended by the Brazilian Ministry of Agriculture, Livestock and Supplies (MAPA) in 2004. The number of alleles and expected heterozygosity (He) per marker ranged from four to 18, and from 0.051 to 0.831, respectively. Using all markers, 100% of parentage cases of the validation dataset were resolved with a strict confidence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parentage errors; Animal breeding; Animal genetic resources; Capra hircus.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000100010
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