Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura最新文献

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ESTUDO GENÉTICO QUANTITATIVO EM CARACTERÍSTICAS PRODUTIVAS DE BOVINOS DA RAÇA NELORE CRIADOS NA REGIÃO NORTE DO BRASIL 巴西北部内洛尔牛生产性状的定量遗传研究

Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura Pub Date : 2014-01-03 DOI: 10.37885/201202539

J. L. Ferreira, F. Lopes, E. Marques, M. Silva, A. S. D. Assis, Leonardo de Sousa Pereira, L. Nepomuceno

{"title":"ESTUDO GENÉTICO QUANTITATIVO EM CARACTERÍSTICAS PRODUTIVAS DE BOVINOS DA RAÇA NELORE CRIADOS NA REGIÃO NORTE DO BRASIL","authors":"J. L. Ferreira, F. Lopes, E. Marques, M. Silva, A. S. D. Assis, Leonardo de Sousa Pereira, L. Nepomuceno","doi":"10.37885/201202539","DOIUrl":"https://doi.org/10.37885/201202539","url":null,"abstract":"ABSTRACT. Ferreira J.L., Lopes F.B., Marques E.G., Silva M.C., Assis A.S., Pereira L.S. & Nepomuceno L.L. [Quantitative genetic study at production traits of Nellore cattle raised in Northern, Brazil.] Estudo genetico quantitativo em caracteristicas produtivas de bovinos da raca Nelore criados na Regiao Norte do Brasil. Revista Brasileira de Medicina Veterinaria, 36(1):11-17, 2014. Programa de Pos-Graduacao em Ciencia Animal Tropical, Universidade Federal do Tocantins, BR 153 Km 112, Caixa Postal 132, Zona Rural, Araguaina, TO 77804-970, Brasil. E-mail: jlferreira@uft.edu.br Effective research related to quantitative genetic analyzes of growth traits in Northern Brazil, are incipient. Thus, this study was carried out to analyze data of calculated weight at 205 (W205), 365 (W365) and 550 (W550) days old and days to gain 160 kg (D160) pre-weaning and days to gain 240 kg (D240) post- -weaning of Nellore cattle raised on pasture from Humid Tropics. It was used animal mixed model. As fixed effects were included the contemporary group and covariate age of cow and as random effects were included the additive direct genetic and residual. It was used restricted maximum likelihood method by the MTDFREML. Estimates of heritability were 0.27 (W205), 0.54 (W365), 0.39 (W550), 0.23 (D160) and 0.24 (D240). Estimates of genetic correlations between P365 and P450, P365 and P550 and between P450 and P550 were 0.98, 0.94 and 0.98, respectively. Selection responses to for W365, W450 and W550 were favorable indicating that the selection criteria adopted in these farms are favoring genetically these traits. Estimates of heritability showed high magnitude, as well as genetic correlations between traits, indicating that both indirect and direct selection would cause changes in the average population for these traits.","PeriodicalId":322099,"journal":{"name":"Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura","volume":"23 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131825769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

NONLINEAR MODELS FOR FITTING GROWTH CURVES OF NELLORE COWS REARED IN THE AMAZON BIOME 拟合亚马逊地区生长曲线的非线性模型

Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura Pub Date : 2013-09-01 DOI: 10.1590/S1516-35982013000900006

K. N. D. S. Marinho, A. R. Freitas, A. Falcão, F. Dias

{"title":"NONLINEAR MODELS FOR FITTING GROWTH CURVES OF NELLORE COWS REARED IN THE AMAZON BIOME","authors":"K. N. D. S. Marinho, A. R. Freitas, A. Falcão, F. Dias","doi":"10.1590/S1516-35982013000900006","DOIUrl":"https://doi.org/10.1590/S1516-35982013000900006","url":null,"abstract":"Growth curves of Nellore cows were estimated by comparing six nonlinear models: Brody, Logistic, two alternatives by Gompertz, Richards and Von Bertalanffy. The models were fitted to weight-age data, from birth to 750 days of age of 29,221 cows, born between 1976 and 2006 in the Brazilian states of Acre, Amapa, Amazonas, Para, Rondonia, Roraima and Tocantins. The models were fitted by the Gauss-Newton method. The goodness of fit of the models was evaluated by using mean square error, adjusted coefficient of determination, prediction error and mean absolute error. Biological interpretation of parameters was accomplished by plotting estimated weights versus the observed weight means, instantaneous growth rate, absolute maturity rate, relative instantaneous growth rate, inflection point and magnitude of the parameters A (asymptotic weight) and K (maturing rate). The Brody and Von Bertalanffy models fitted the weight-age data but the other models did not. The average weight (A) and growth rate (K) were: 384.6±1.63 kg and 0.0022±0.00002 (Brody) and 313.40±0.70 kg and 0.0045±0.00002 (Von Bertalanffy). The Brody model provides better goodness of fit than the Von Bertalanffy model.","PeriodicalId":322099,"journal":{"name":"Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132892702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

INTERAÇÃO GENÓTIPO-AMBIENTE EM PESOS PÓS-DESMAMA DE BOVINOS NELORE CRIADOS NOS ESTADOS DOMARANHÃO, MATO GROSSO E PARÁ 在maranhao、马托格罗索和para州饲养的内洛尔牛断奶后体重的基因型-环境相互作用

Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura Pub Date : 1900-01-01 DOI: 10.37885/201202537

Thaymisson Santos de Lira, Leonardo de Sousa Pereira, L. Nepomuceno, Emerson Alexandrino, F. Lopes, R. B. Lôbo, J. L. Ferreira

引用次数: 0