Data/hora: 10/05/2024 19:01:19

Biblioteca(s): 	Embrapa Caprinos e Ovinos.	
Data corrente: 	15/07/2020	
Data da última atualização: 	11/01/2024	
Autoria: 	PAIVA, R. D. M.; SOUSA, J. E. R. de; FERREIRA, J.; CUNHA, E. C.; PAIVA, M. P. S. L. M. de; GOUVEIA, A. M. G.; FACO, O.	
Afiliação: 	RENATO DIÓGENES MACEDO PAIVA, Federal Rural University of the Semi-arid Region (UFERSA) - Mossoró - RN, Brazil; JOSÉ ERNANDES RUFINO DE SOUSA, Federal Rural University of the Semi-arid Region (UFERSA) - Mossoró - RN, Brazil; JOSIEL FERREIRA, Federal Rural University of the Semi-arid Region (UFERSA) - Mossoró - RN, Brazil; ELIZÂNGELA EMÍDIO CUNHA, Federal Rural University of the Semi-arid Region (UFERSA) - Natal - RN, Brazil; MARIA PIA SOUZA LIMA MATTOS DE PAIVA, Caprileite - Associação dos Criadores de Caprinos e Ovinos - Belo Horizonte, MG, Brazil; AURORA MARIA GUIMARÃES GOUVEIA, Federal University of Minas Gerais (UFMG) - Belo Horizonte, MG, Brazil; OLIVARDO FACO, CNPC.	
Título: 	Population structure and effect of inbreeding on milk yield of Saanen goats in Brazilian production systems.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Small Ruminant Research, v. 192, e106194, Nov. 2020.	
DOI: 	https://doi.org/10.1016/j.smallrumres.2020.106194	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The aim of this study was to evaluate the history of a population of Saanen goats based on the population structure and the effect of inbreeding on accumulated 305-d milk yield (MY305) and lactation length (LL). Pedigree data of 7,640 individuals born between 1997 and 2014 were analyzed for pedigree and population parameters were estimated based on the probability of gene origin, effective population size (Ne), average inbreeding (F), flock classification according to origin and use of breeding animals, average relatedness coefficient (AR), pedigree completeness and number of generations using the ENDOG v4.8 software program. A total of 79.57%, 50.73%, 29.10%, and 11.60% of the examined individuals had pedigrees in the first, second, third and fourth ancestry, respectively. The total number of founders and ancestors was 123 and 101, respectively, and 39 of the latter explained 50% of the genetic variability in the population, which indicates a loss of original genes. The AR and F coefficient were 0.78 and 1.48, respectively. There was no significant inbreeding effect on LL. The MY305 was significantly affected by inbreeding, with a reduction of 2.31?kg per 1% increase in the individual inbreeding coefficient. The LL and MY305 exhibited heritability of 0.03 and 0.18 respectively, with a genetic correlation of 0.97.	
Palavras-Chave: 	Effective population; Genetic variability; Inbreeding drepression.	
Thesaurus Nal: 	Animal genetics; Breeding and Genetic Improvement; Dairy goats; Genetic variation; Lactation.	
Categoria do assunto: 	G Melhoramento Genético	
Registro original: 	Embrapa Caprinos e Ovinos (CNPC)	
Exemplares: 	CNPC - (39610-1) - UPC - AP - DD -  -  -  - DIS