Artículos de revistas
QTL affecting body weight in a candidate region of cattle chromosome 5
Fecha
2003-01-01Registro en:
Genetics and Molecular Biology. Sociedade Brasileira de Genética, v. 26, n. 3, p. 259-265, 2003.
1415-4757
10.1590/S1415-47572003000300008
S1415-47572003000300008
S1415-47572003000300008.pdf
5593441035110683
Autor
Universidade Federal de São Carlos (UFSCar)
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Universidade Estadual Paulista (Unesp)
U.S. Meat Animal Research Center
Universidade de São Paulo (USP)
Institución
Resumen
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.