INVESTIGADORES
AÑON Maria Cristina
artículos
Título:
Association of bovine chromosome 5 markers with birth and weaning
Autor/es:
A. ROGBERG-MUÑOZ; L. MELUCCI; A. PRANDO; E.E. VILLEGAS-CASTAGNASSO; M.V. RIPOLI; P. PERAL-GARCÍA; A. BALDO; M.C. AÑON; G. GIOVAMBATTISTA
Revista:
LIVESTOCK SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2011 vol. 135 p. 124 - 130
ISSN:
1871-1413
Resumen:
Genetic markers have been used to assess the association of economically important traits with
cattle under intensive feeding conditions; however, there is still the need to ascertain the
usefulness of these markers under extensive production systems. Bovine chromosome 5 has
been widely studied because several QTLs have been detected. Microsatellite BP1 neighboring
the Myogenic factor 5 gene (Myf5), and microsatellites ETH10, IGF1 and RM029 near Insulin-like
Growth Factor 1 gene (IGF1), were selected to establish their association with BLUPs (Best
Linear Unbiased Predictor) for direct Birth Weight (dBW), direct Weaning Weight (dWW) and
maternal Weaning Weight (mWW). Two herds were used for this objective, one commercial
and the other experimental. Associations (P≤0.05) between dWW and all BTA5 loci (BP1,
ETH10, IGF1, and RM029) were detected. Additional associations were observed between
mWW and BP1. dBW was significantly associated (P≤0.05) with ETH10 genotypes and with
the interaction IGF1*Herd. In particular region near BP1 could be contributing to the rare
positive correlation between dWW and mWW previously found in the INTA Balcarce Station
experimental herd. We confirmed marker associations with growth traits in two BTA5 regions
close to previously reported QTL obtained in intensive feeding conditions; these regions affect
dBW, dWW and mWW in a pasture-based system.
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