Fecha/hora: 03/06/2024 04:25:40

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	31/07/2017	
Fecha de la última actualización: 	31/07/2017	
Autoria: 	FEITOSA, F. L. B.; OLIVIERI, B. F.; ABOUJAOUDE, C.; PEREIRA, A. S. C.; DE LEMOS, M. V. A.; CHIAIA, H. L. J.; BERTON, M. P.; PERIPOLLI, E.; FERRINHO, A. M.; MUELLER, L. F.; MAZZALI, M. R.; DE ALBUQUERQUE, L. G.; DE OLIVERA, H. N.; TONHATI, H.; ESPIGOLAN, R.; TONUSSI, R. L.; DE OLIVIERA SILVA, R. M.; GORDO, D. G. M.; MAGALHAES, A. F. B.; AGUILAR, I.; BALDI, F. S. B.	
Afiliación: 	FABIELI LOISE BRAGA FEITOSA, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; BIANCA FERREIRA OLIVIERI, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; CAROLYN ABOUJAOUDE, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; ANGÉLICA SIMONE CRAVO, Faculdade de Medicina Veterinária e Zootecnia da USP, Pirassununga, Brazil; MARCOS VINICIUS ANTUNES DE LEMOS, UNESP-Universidade Estadual Paulista, Department of Animal Science, Sao Paulo, Brazil; HERMENEGILDO LUCAS JUSTINO CHIAIA, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; MARIANA PIATTO BERTON, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; ELISA PERIPOLLI, UNESP-Universidade Estadual Paulista, Department of Zootechnics, Sao Paulo, Brazil; ADRIELLE MATHIAS FERRINHO, Universidade de Sao Paulo - USP, Faculdade de Medicina Veterinária e Zootecnia, Sao Paulo, Brazil; LENISE FREITAS MUELLER, Universidade de Sao Paulo - USP, Faculdade de Zootecnia e Engenharia de Alimentos, Sao Paulo, Brazil; MÓNICA ROBERTA MAZALLI, Universidade de Sao Paulo - USP, Food Engineering Department, Sao Paulo, Brazil; LÚCIA GALVAO DE ALBUQUERQUE, UNESP-Universidade Estadual Paulista, Department of Animal Science, Sao Paulo, Brazil; HENRIQUE NUNES DE OLIVERA, UNESP-Universidade Estadual Paulista, Department of Animal Science, Sao Paulo, Brazil; HUMBERTO TONHATI, UNESP-Universidade Estadual Paulista, Department of Zootechnics, Sao Paulo, Brazil; RAFAEL ESPIGOLAN, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; RAFAEL LARA TONUSSI, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; RAFAEL MEDEIROS DE OLIVEIRA SILVA, UNESP-Universidade Estadual Paulista, Department of Animal Science, Sao Paulo, Brazil; DANIEL GUSTAVO MANSAN GORDO, UNESP-Universidade Estadual Paulista, Sao Paulo, Brazil; ANA FRABICIA BRAGA MAGALHAES, UNESP-Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo, Brazil; IGNACIO AGUILAR GARCIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO S. B. BALDI, UNESP-Universidade Estadual Paulista, Sao Paulo, Brazil.	
Título: 	Genetic correlation estimates between beef fatty acid profile with meat and carcass traits in Nellore cattle finished in feedlot.	
Año de publicación: 	2017	
Fuente/Imprenta: 	Journal of Applied Genetics, 2017, 58 (1), 123-132.	
ISSN: 	1234-1983	
DOI: 	10.1007/s13353-016-0360-7	
Idioma: 	Inglés	
Notas: 	Article history: Received: 15 December 2015 /Revised: 10 March 2016 /Accepted: 5 July 2016 / Published Online: 30 July 2016	
Contenido: 	ABSTRACT.

The objective of this study was to estimate the genetic?quantitative relationships between the beef fatty acid profile with the carcass and meat traits of Nellore cattle. A total of 1826 bulls finished in feedlot conditions and slaughtered at 24 months of age on average were used. The following carcass and meat traits were analysed: subcutaneous fat thickness (BF), shear force (SF) and total intramuscular fat (IMF). The fatty acid (FA) profile of the Longissimus thoracis samples was determined. Twenty-five FAs (18 individuals and seven groups of FAs) were selected due to their importance for human health. The animals were genotyped with the BovineHD BeadChip and, after quality control for single nucleotide polymorphisms (SNPs), only 470,007 SNPs from 1556 samples remained. The model included the random genetic additive direct effect, the fixed effect of the contemporary group and the animal?s slaughter age as a covariable. The (co)variances and genetic parameters were estimated using the REML method, considering an animal model (single-step GBLUP). A total of 25 multi-trait analyses, with four traits, were performed considering SF, BF and IMF plus each individual FA. The heritability estimates for individual saturated fatty acids (SFA) varied from 0.06 to 0.65, for monounsaturated fatty acids (MUFA) it varied from 0.02 to 0.14 and for polyunsaturated fatty acids (PUFA) it ranged from 0.05 to 0.68. The heritability estimates for Omega 3, Omega 6, SFA, MUFA and PUFA sum were low to moderate, varying from 0.09 to 0.20. The carcass and meat traits, SF (0.06) and IMF (0.07), had low heritability estimates, while BF (0.17) was moderate. The genetic correlation estimates between SFA sum, MUFA sum and PUFA sum with BF were 0.04, 0.64 and &#8722;0.41, respectively. The genetic correlation estimates between SFA sum, MUFA sum and PUFA sum with SF were 0.29, &#8722;0.06 and &#8722;0.04, respectively. The genetic correlation estimates between SFA sum, MUFA sum and PUFA sum with IMF were 0.24, 0.90 and &#8722;0.67, respectively. The selection to improve meat tenderness in Nellore cattle should not change the fatty acid composition in beef, so it is possible to improve this attribute without affecting the nutritional beef quality in zebu breeds. However, selection for increased deposition of subcutaneous fat thickness and especially the percentage of intramuscular fat should lead to changes in the fat composition, highlighting a genetic antagonism between meat nutritional value and acceptability by the consumer. 

© 2016, Institute of Plant Genetics, Polish Academy of Sciences, Poznan.	
Palabras-Clave: 	BOS INDICUS; FAT; HUMAN HEALTH; MEAT QUALITY; MEAT TENDERNESS; SELECTION.	
Categoría del tema: 	L10 Genética y mejoramiento animal	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (101443-1) - PXI - AP - DD - PP/JR.APPL.GENETICS/2017 -  -  - DIS