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| Silva,Delvan Alves da; Silva,Fabyano Fonseca e; Ventura,Henrique Torres; Junqueira,Vinícius Silva; Silva,Alessandra Alves da; Mota,Rodrigo Reis; Lopes,Paulo Sávio. |
| Abstract: The objective of this work was to evaluate the criteria for the formation of contemporary groups (CGs) in the genetic evaluation of body weight at weaning in Nellore cattle. A total of 713,474 records from 3,066 herds located in Midwestern and Northern Brazil were used. Data were obtained from the genealogical registry of zebu breeds of the Brazilian association of zebu breeders. Data structures were defined based on the number of standard deviations (SDs) for outlier removal (±2.0, ±2.5, ±3.0, and ±3.5) and on the minimal number of animals per CG (3, 7, and 15). Genetic evaluation was performed with an animal model using Bayesian inference. Data structures with ±3.5 SDs and CG with at least 15 animals presented the highest additive genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heritability; Outliers; Zebu.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800643 |
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| Junqueira,Vinícius Silva; Lopes,Paulo Sávio; Resende,Marcos Deon Vilela de; Silva,Fabyano Fonseca e; Lourenço,Daniela Andressa Lino; Yokoo,Marcos Jun Iti; Cardoso,Fernando Flores. |
| ABSTRACT We aimed to evaluate the impact of using embryo transfer (ET) information on weaning weight estimated breeding values (EBV) and its accuracy. Data from Hereford and Braford cattle, raised under extensive conditions in Southern Brazil, were used. A model that included ET information in addition to maternal (genetic and permanent environmental) effects as a function of foster dams was compared to a model without ET information. Accuracy of both bulls and calves increased due to inclusion of ET records in 0.04 and 0.12 points, respectively. In general, the inclusion of ET records provided a greater amount of phenotypic variance and most accurate EBV for sires and progeny. The results obtained in this study encourage the use of ET phenotypic records... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Accuracy; Assisted reproduction; Foster dam; Genetic groups. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100405 |
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