TY - JOUR
T1 - Effect of beta-lactoglobulin polymorphism and seasonality on bovine milk composition
AU - Botaro, Bruno G.
AU - Lima, Ygor V.R.
AU - Aquino, Adriana A.
AU - Fernandes, Raquel H.R.
AU - Garcia, José F.
AU - Santos, Marcos V.
PY - 2008/5
Y1 - 2008/5
N2 - The objective was to evaluate the effect of β-lactoglobulin (β-lg) polymorphism and seasonality on milk composition (fat, lactose, total solids, milk urea nitrogen, total protein, true protein, casein and somatic cell counts) of Holstein and Girolando cows. Milk and blood samples from 278 Holsteins cows and 156 Girolando cows were taken during two dry seasons and two rainy seasons, for milk composition analysis and to determine β-lg genotypes, respectively. BB genotype was the most frequent for both breeds, followed by AA genotype for Holstein (BB>AA>AB) and by AB for Girolando cows (BB>AB>AA). No differences were found in milk compositional characteristics among genetic variants of β-lg (AA, AB and BB) either between Holstein or Girolando cows. No association between milk composition and β-lg genetic polymorphism was observed. During the dry season, independently of the breed considered, higher contents of lactose, true protein, casein and casein:true protein ratio were found.
AB - The objective was to evaluate the effect of β-lactoglobulin (β-lg) polymorphism and seasonality on milk composition (fat, lactose, total solids, milk urea nitrogen, total protein, true protein, casein and somatic cell counts) of Holstein and Girolando cows. Milk and blood samples from 278 Holsteins cows and 156 Girolando cows were taken during two dry seasons and two rainy seasons, for milk composition analysis and to determine β-lg genotypes, respectively. BB genotype was the most frequent for both breeds, followed by AA genotype for Holstein (BB>AA>AB) and by AB for Girolando cows (BB>AB>AA). No differences were found in milk compositional characteristics among genetic variants of β-lg (AA, AB and BB) either between Holstein or Girolando cows. No association between milk composition and β-lg genetic polymorphism was observed. During the dry season, independently of the breed considered, higher contents of lactose, true protein, casein and casein:true protein ratio were found.
KW - Genetic variants
KW - Milk protein
KW - Seasonality
KW - β-lactoglobulin
UR - https://www.scopus.com/pages/publications/43449112944
U2 - 10.1017/S0022029908003269
DO - 10.1017/S0022029908003269
M3 - Article
C2 - 18474134
AN - SCOPUS:43449112944
SN - 0022-0299
VL - 75
SP - 176
EP - 181
JO - Journal of Dairy Research
JF - Journal of Dairy Research
IS - 2
ER -