Data/hora: 14/06/2024 03:38:19

Provedor de dados: 	96	
País: 	Brazil	
Título: 	Tabapuã breed in Northeastern Brazil: genetic progress and population structure	
Autores: 	Caires,Dirlane Novais; Malhado,Carlos Henrique Mendes; Souza,Laaina de Andrade; Teixeira Neto,Milton Rezende; Carneiro,Paulo Luiz Souza; Martins Filho,Raimundo.	
Data: 	2012-08-01	
Ano: 	2012	
Palavras-chave: 	Genetic gain; Generation interval; Inbreeding effective size.	
Resumo: 	The objective of this study was to evaluate the history of the Tabapuã breed in Northeastern Brazil by determining its population structure and genetic progress. Pedigree information from animals born in the period between 1965 and 2006 and weight-adjusted data at 205 (W205), 365 (W365) and 550 (W550) days of age for bovines born between 1975 and 2006 were used. The (co)variance components and genetic value were estimated using the application MTDFREML. Also, the software ENDOG was used for pedigree analysis and parameter estimation based on the probabilities of gene origin, inbreeding and average generation interval. The heritability coefficients for direct genetic effects were 0.21±0.03, 0.26±0.04 and 0.36±0.05 for W205, W365 and W550, respectively. During the first 20 years studied, the observed effective size was small. The generation intervals by gametic pathway were: 7.7±3.4 (sire-son), 7.8±3.7 (sire-daughter), 6.9±3.3 (dam-son), 6.8 ± 3.1 (dam-daughter), and mean interval of 7.3±3.4 years. The studied population showed moderate heritability coefficients, whereas the genetic gains based on the studied traits may be higher than those estimated by genetic tendencies. Reduced generation interval, increased effective size and continuous mating control of relatives are important strategies for the genetic progress of the Tabapuã breed in the region.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800008	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/S1516-35982012000800008	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.41 n.8 2012	
Fonte: 	info:eu-repo/semantics/openAccess