Título:	QTL affecting body weight in a candidate region of cattle chromosome 5.
Autoria:	MACHADO, M. B. B. ALENCAR, M. M. de PEREIRA, A. P. OLIVEIRA, H. N. CASAS, E. COUTINHO, L. L. REGITANO, L. C. de A.
Afiliação:	MARIANA B. B. MACHADO, Universidade Federal de São Carlos; MAURICIO MELLO DE ALENCAR, CPPSE; ANDRÉA P. PEREIRA, Universidade Federal de São Carlos; HENRIQUE N. OLIVEIRA, Universidade Estadual de São Paulo; EDUARDO CASAS, U. S. Meat Animal Research Center; LUIS L. COUTINHO, Universidade de São Paulo; LUCIANA CORREIA DE ALMEIDA REGITANO, CPPSE.
Ano de publicação:	2003
Referência:	Genetics and Molecular Biology, v. 26, n. 3, p. 259-265, 2003.
Conteúdo:	The objective of this work was to identify QTLs for liveweight in a candidate region of bovine chromosome 5. Half-sib families from two lines, one traditional and the other new, of Canchim beef cattle (5/8 Charolais + 3/8 Zebu) were genotyped for four microsatellite markers, including the microsatellite in the IGF-1 (insulin-like growth factor-1) promoter region. Significant differences in allele distribution between the two lines were found for three markers. Interval mapping analyses in this region indicated the presence of a QTL controlling birth weight (p < 0.05) and of a QTL influencing breeding value for yearling weight (p < 0.01) in the newer line of the breed. The previously identified interaction between the IGF-1 genotype and genetic group strengthens the hypothesis of a linked QTL rather than an IGF-1 effect on growth traits in the Canchim cattle.
Palavras-chave:	Growth trits Microsatellite Bovine
Digital Object Identifier:	https://doi.org/10.1590/S1415-47572003000300008
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)