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| Barbosa,Severino B.P.; Ramalho,Ricardo P.; Monardes,Humberto G.; Dias,Flávio M.; Santos,Djalma C. dos; Batista,Ângela M.V.. |
| The productive performance of four Holstein-Gir genetic groups (1/2H, 1/4H, 5/8H, 5/8Hinter se) and the effects of non-genetic factors on production traits was evaluated using a data set of 7,951 test-day samples collected between January 1980 and December 1999 from the Arcoverde Experimental Station in the Brazilian state of Pernambuco (Empresa Pernambucana de Pesquisa Agropecuária). The statistical model included the fixed effects of calving year (1980 to 1999) and month (January to December), genetic group of the cow, age at months of calving (33 to 190) and days in milk at each test-day. Random effects were sire, cow and residual with test-days treated as repeated records within each cow within each lactation. For the four genetic groups the milk yield... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic groups; Epistasis; Genetics groups; Recombination; Repeated measures; Test-day. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300012 |
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| Fonseca,Carlos Eduardo Lazarini da; Morais,Fernanda Monteiro de; Gonçalves,Helenice Moura; Aquino,Fabiana de Gois; Rocha,Fernando Souza. |
| Abstract: The objective of this work was to estimate the repeatability coefficients of mangaba (Hancornia speciosa) fruit traits, in order to define the number of fruit needed for an accurate selection of superior genotypes, as well as to conjecture about the nature of the phenotypic variation of these traits. Evaluations were performed for 160 fruit of 16 genotypes from two native H. speciosa populations of Goiás Velho and Padre Bernardo, in the state of Goiás, Brazil. Repeatability was estimated by the analysis of variance, principal component analyses based on covariance and on the correlation matrix, and structural analysis based on the correlation matrix. Repeatability estimates for fruit weight, diameter, and length, as well as seed number and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of determination; Mangaba; Repeated measures; Savannah; Selection efficiency. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600710 |
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| Braz,Thiago Gomes dos Santos; Fonseca,Dilermando Miranda da; Jank,Liana; Cruz,Cosme Damião; Martuscello,Janaina Azevedo. |
| The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of determination; Forage; Repeated measures; Selection efficiency. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015001100377 |
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