Data/hora: 06/06/2024 07:51:21

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 27/03/2013
Data da última atualização: | 05/02/2018
Autoria: | PEDROSA, V. B.; SANTANA JUNIOR, M. L.; OLIVEIRA, P. S.; ELER, J. P.; FERRAZ, J. B. S.
Título: | Population structure and inbreeding effects on growth traits of Santa Ines sheep in Brazil.
Ano de publicação: | 2010
Fonte/Imprenta: | Small Ruminant Research, Amsterdam, v. 93, n. 2/3, p. 135-139, Oct. 2010.
DOI: | 10.1016/j.smallrumres.2010.05.012
Idioma: | Inglês
Conteúdo: | The aim of this study was to describe the population structure, inbreeding and to quantify their effect for different weights, of Santa Ines sheep. For this reason, 6490 data of production and 17,097 animals in the pedigree data set were utilized to evaluate birth weight (BW), weight at 60 days (W60) and weight at 180 days (W180). The genetic structure analysis of the population was realized by the software ENDOG (v.4.6.), resulting in some level of inbreeding for 21.72% of the animals in the pedigree data, being 41.02% the maximum value, and average of 10.74% for the inbred individuals. The population average inbreeding was 2.33% and the average relatedness was 0.73%. The effective number of ancestors was 156 animals and the effective number of founders was 211 individuals. A significant depressive effect of the inbreeding can be verified for all traits. The monitored parameters related with the genetic variability on this population must be constant in order to prevent the decrease in the genetic progress. The utilization of a program for directed mating in the present flock is an appropriate alternative to keep the level of inbreeding under control. (C) 2010 Elsevier B.V. All rights reserved.
Palavras-Chave: | Brasil; Effective population size; Generation interval; Intervalo de geração; Raça Santa Inês; Tamanho efetivo.
Thesagro: | Crescimento; Endogamia; Ovino.
Categoria do assunto: | --
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (26862-1) - ADD - AP - DD -  -  -  - DIS