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| Registros recuperados: 204 | |
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| Koetz Júnior,Celso; Roso,Vanerlei Mozaquatro; Claus,Luís Afonso Marques; Oliveira,Rui Paulo Lopes de; Fávaro,Patrícia da Cruz; Borges,Marcelo Henrique Favaro; Barcellos,Júlio Otavio Jardim; Ribeiro,Edson Luís de Azambuja. |
| ABSTRACT: 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 present study, the selection index comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, WM) yearling (YC, YP and YM), scrotal circumference at yearling (SC), days to gain 160kg from birth to weaning (D160) and 240kg after weaning (D240). This are related to birth weight gain at weaning (WG) and from weaning to yearling (YG). The mature (MW) and birth weight (BW) traits were not considered in the selection index. The aim of this study was to estimate the values for the genetic trends... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Productive traits; Selection. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300652 |
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| Tamioso,Priscilla Regina; Cosmo,Tiago Rafael; Pimentel,Concepta Margaret McManus; Dias,Laila Talarico; Teixeira,Rodrigo de Almeida. |
| The aim of this study was to estimate the heritability for weight and height at withers of 260-780 days of age No Defined Breed (NDB) horses, at intervals of 40 days, which belong to the Brazilian Army cavalry. Thus, the model considered the direct genetic effects as random ones, as fixed, the effects of sex and year of birth and the linear effects of height at withers and age, as covariates for the analysis of body weight, whereas for the analysis of height, the linear effect of weight was included as a covariate. For the complete data, the estimated heritability coefficients were 0.40±0.034 and 0.70±0.019 for weight and height at withers, respectively, indicating that individual selection for these traits may be effective. On the other hand, for the data... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cavalry; Growth traits; Selection. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001200023 |
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| Souza,Ana Raquel Ribeiro e; Miranda,Glauco Vieira; Pereira,Messias Gonzaga; Souza,Leandro Vagno de. |
| The objectives of this research were to evaluate the genetic variability and predict genetic gain in the white maize landrace rescued in Barbacena, Minas Gerais, Brazil. The Brazilian maize landraces have economic and social importance for certain areas in Brazil, and research on this germplasm is very important for local food security. Three experiments were carried out with 100 half-sib progenies, in Campos dos Goytacazes, RJ, Coimbra and Barbacena, Minas Gerais, Brazil. These sites were chosen for their soil and climatic differences. An analysis of variance was significant among the progeny for all characters, indicating the presence of genetic variability between the three populations. In Campos dos Goytacazes and Coimbra, the genetic variation of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection; Rescue; Breeding. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100004 |
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| Registros recuperados: 204 | |
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