Navegação Ciências Agrárias por Título

Resultados 1819-1838 de 3899

    • Genetic parameters for milk production by using random regression models with different alternatives of fixed regression modeling 

      Cobuci, Jaime Araújo; Costa, Claudio Napolis; Braccini Neto, José; Freitas, Ary Ferreira de (2011) [Artigo de periódico]
      Records of test-day milk yields of the first three lactations of 25,500 Holstein cows were used to estimate genetic parameters for milk yield by using two alternatives of definition of fixed regression of the random ...

    • Genetic parameters for production traits in primiparous Holstein cows estimated by random regression models 

      Biassus, Igor de Oliveira; Cobuci, Jaime Araújo; Costa, Claudio Napolis; Rorato, Paulo Roberto Nogara; Braccini Neto, José; Cardoso, Leandro Lunardini (2011) [Artigo de periódico]
      The objective of this study was to estimate genetic parameters for milk, fat and protein yields of Holstein cows using 56,508; 35,091 and 8,326 test-day milk records from 7,015, 4,476 and 1,114 cows, calves of 359, 246 and ...

    • Genetic parameters for test day milk yield of first lactation Holstein cows estimated by random regression using Legendre polynomials 

      Costa, Claudio Napolis; Melo, Claudio Manoel Rodrigues de; Packer, Irineu Umberto; Freitas, Ary Ferreira de; Teixeira, Nilson Milagres; Cobuci, Jaime Araújo (2008) [Artigo de periódico]
      Um total de 263.390 registros de produção de leite do dia do controle (PC) de 32.448 primeiras lactações de vacas da raça Holandesa com partos entre 1991 e 2001, disponibilizados pela Associação Brasileira de Criadores de ...

    • Genetic parameters for type traits in Holstein cows in Brazil 

      Campos, Rafael Viegas; Cobuci, Jaime Araújo; Costa, Claudio Napolis; Braccini Neto, José (2012) [Artigo de periódico]
      Data from 26,558 Holstein cows in 802 herds were used to estimate genetic, residual and phenotypic parameters for 22 type traits. The model included the fixed effects of herd-year, period of classification, classifier, ...

    • Genetic parameters of age at first calving, weight gain, and visual scores in Nelore heifers 

      Claus, Luis Afonso Marques; Koetz Junior, Celso; Roso, Vanerlei Mozaquatro; Borges, Marcelo Henrique Favaro; Barcellos, Julio Otavio Jardim; Ribeiro, Edson Luis de Azambuja (2017) [Artigo de periódico]
      This study aimed at estimating the heritability of age at first calving and of performance traits included in the selection index and the genetic correlations between age at first calving and these performance traits. Data ...

    • Genetic parameters of milk production and reproduction traits of Girolando cattle in Brazil 

      Cayo, Ali William Canaza; Lopes, Paulo Sávio; Cobuci, Jaime Araújo; Martins, Marta Fonseca; Silva, Marcos Vinicius Gualberto Barbosa (2018) [Artigo de periódico]

    • Genetic parameters, prediction of gains and intraspecific hybrid selection of Paspalum notatum Flügge for forage using REML/BLUP 

      Silveira, Diógenes Cecchin; Machado, Juliana Medianeira; Motta, Eder Alexandre Minski da; Barbosa, Marlon Risso; Simioni, Carine; Weiler, Roberto Luis; Mills, Annamaria; Sampaio, Rodrigo; Brunes, André Pich; Dall'Agnol, Miguel (2022) [Artigo de periódico]
      Genetic improvement of native forage species is a sustainable alternative for maximizing livestock production. Paspalum notatum Flügge is the most important forage grass in the native grasslands of southern Brazil, with ...

    • Genetics and identification of markers linked to multiflorous spikelet in hexaploid oat 

      Pellizzaro, Kelly; Nava, Itamar Cristiano; Chao, Shiaoman; Pacheco, Marcelo Teixeira; Federizzi, Luiz Carlos (2016) [Artigo de periódico]
      The formation of naked grains is directly associated with the formation of multiflorous spikelets in oats. The objectives of this study were to determine the genetics of multiflorous spikelet and to identify molecular ...

    • Genetic selection modulates feeding behavior of group-housed pigs exposed to daily cyclic high ambient temperatures 

      Fraga, Alícia Zem; Hauschild, Luciano; Campos, Paulo Henrique Reis Furtado; Valk, Márcio; Bello, Débora Zava; Silva, Marcos Kipper da; Andretta, Ines (2022) [Artigo de periódico]
      This study was conducted to evaluate the effect of genetic selection (Lines A and B; Line A pigs have a greater proportion of Pietrain genes than those from Line B and therefore, selected for improved lean tissue accretion) ...

    • Genetic similarities of Escherichia coli isolated from different substrates of the broiler production chain 

      Teles, Pedro Filipe de Souza; Boiago, Marcel Manente; Frigo, Angélica; Rampazzo, Luana; Araujo, Denise Nunes; Kich, Jalusa Deon; Rebelatto, Raquel; Furian, Thales Quedi; Stefani, Lenita de Cássia Moura (2021) [Artigo de periódico]
      Brazil is the largest exporter of chicken meat and poultry farming is one of the most important productive segments, despite major losses due to the bacterium Escherichia coli, which is also a zoonotic microorganism. The ...

    • Genetic similarity among accessions of Paspalum notatum Flügge (Poaceae) : a potential to parental selection 

      Fachinetto, Juliana Maria; Dall'Agnol, Miguel; Schneider-Canny, Raquel; Janke-Porto, Aline; Souza, Mariângela Gil de (2021) [Artigo de periódico]
      Paspalum notatum is an important forage grass contributing significantly to the coverage of the natural fields of Southern Brazil. Simple sequence repeat (SSR) markers were used to evaluate the genetic similarity of strains ...

    • Genetic similarity among strawberry cultivars assessed by RAPD and ISSR markers 

      Morales, Rafael Gustavo Ferreira; Resende, Juliano Tadeu Vilela; Faria, Marcos Ventura; Andrade, Marcela Carvalho; Resende, Luciane Vilela; Delatorre, Carla Andrea; Silva, Paulo Roberto da (2011) [Artigo de periódico]
      Most strawberry (Fragaria × ananassa Duchesne) cultivars used in Brazil are developed in other countries, it became clear the need to start the strawberry breeding program in the country. To start a breeding program is ...

    • Genetic similarity in a hybrid population of 'Montenegrina' and 'King' mandarins 

      Brugnara, Eduardo Cesar; Bastianel, Marines; Weiler, Roberto Luis; Schwarz, Sergio Francisco (2012) [Artigo de periódico]
      The objective of this work was to confirm the hybrids obtained in plants originated from the crossing between the mandarins Citrus deliciosa 'Montenegrina' and C. nobilis 'King', and to estimate the genetic similarity among ...

    • Genetics of in vitro organogenesis and precocious germination of wheat embryos 

      Lange, Claudia Erna; Federizzi, Luiz Carlos; Carvalho, Fernando Iraja Felix de; Dornelles, Ana Lucia Cunha; Handel, Cristine Luise (1998) [Artigo de periódico]
      As bases genéticas da germinação precoce de embrióides de trigo e organogênese in vitro foram estudadas utilizando-se seis genótipos brasileiros e suas gerações F1, F2, BC1F1 e BC2F1, através da análise de média de gerações. ...

    • Genetics of naked grain oats in crosses with Brazilian genotypes 

      Cabral, Candida Braga; Milach, Sandra Cristina Kothe; Federizzi, Luiz Carlos; Bothona, Cristhiane Regina Abegg; Taderka, Ivone; Tisian, Luis Marcelo; Limberger, Emerson (2000) [Artigo de periódico]
      A herança dos caracteres grão sem casca aderida à cariopse e espiguetas multifloras foi estudada através da análise das gerações F2 e F3 de seis cruzamentos entre três fontes de germoplasma nuda dos EUA e Austrália e três ...

    • Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle 

      Koetz Junior, Celso; Roso, Vanerlei Mozaquatro; Claus, Luis Afonso Marques; Oliveira, Rui Paulo Lopes de; Fávaro, Patrícia da Cruz; Borges, Marcelo Henrique Favaro; Barcellos, Julio Otavio Jardim; Ribeiro, Edson Luis de Azambuja (2017) [Artigo de periódico]
      Mature weight (MW) of cows is related to the costs of their production. Usually, cows with moderate MW are more efficient in challenging environments, such as those available in the production systems in Brazil. In the ...

    • Genetic use restriction technologies and possible applications in the integrated pest management 

      Dalazen, Giliardi; Merotto Junior, Aldo (2016) [Artigo de periódico]
      Genetic use restriction technologies (GURTs) were developed to preserve the intellectual property of genetically modified crops (GM) and ensure the return of investments made by industry to obtain technology delivered ...

    • Genetic variability of isoflavones in the usda red clover core collection 

      Ramos, Graziele Pereira; Dias, Paula Menna Barreto; Morais, Cláudia Borges de; Dall'Agnol, Miguel; Zuanazzi, Jose Angelo Silveira (2012) [Artigo de periódico]
      Red clover is one of the most utilized forage in agriculture and contains many of the isoflavones known for their human health benefits. The objectives of this study were: i) to quantify, using HPLC analysis, isoflavones ...

    • Genetic variability of the components of seed yield in interspecific hybrids of Paspalum 

      Lopes, Rodrigo Ramos; Souza, Cleber Henrique Lopes de; Pereira, Emerson André; Gasparetto, Bruno Frosi; Dall'Agnol, Miguel; Franke, Lucia Brandao (2017) [Artigo de periódico]
      This study aimed to determine the variability and expression of the components of seed yield in twenty-three apomictic Paspalum plicatulum × Paspalum lepton hybrids and two male parent plants (P. lepton). We used a randomized ...

    • Genetic variation in polyploid forage grass : asessing the molecular genetic variability in the Paspalum genus 

      Cidade, Fernanda Witt; Vigna, Bianca B.Z.; Souza, Francisco Humberto Dübbern de; Valls, José Francisco Montenegro; Dall'Agnol, Miguel; Zucchi, Maria Imaculada; Chies, Tatiana Teixeira de Souza; Souza, Anete Pereira de (2013) [Artigo de periódico]