STUDY ON PHENOTYPIC CORRELATIONS AMONG MILK PRODUCTION AND MILK CHEMICAL COMPOSITION

• Main Authors: SIMONA BAUL, G. STANCIU, L. T. CZISZTER, S. ACATINCĂI, I. TRIPON, D. GAVOJDIAN, SILVIA ERINA, A. BOGNAR
• Format: Article
• Language: English
• Published: Agroprint Timisoara 2009-10-01
• Series: Scientific Papers Animal Science and Biotechnologies
• Subjects: phenotypic correlations; milk yield; milk chemical components; romanian black and white; cows
• Online Access: http://spasb.ro/index.php/spasb/article/view/1077

In this study, the phenotypic correlations among quantitative and qualitative indices of the milk production in Romanian Black and White cows from the Didactical far Timişoara were studied. Studies were carried out on 125 lactations from 92 cows. Correlations coefficients and their statistical significance were calculated. Correlations among the milk yield and the yield of milk chemical components were positive taking values over 0.900, and very significant (p<0.001). Correlations between milk yield and qualitative indices of milk (butterfat percentage, protein percentage, lactose percentage, solids non-fat percentage and total solids percentage) varied between r=-0.002 with butterfat percentage until r=0.187 with protein percentage, but the values did not reached the level of statistical significance (p>0.05). Among the percentage of milk constituents very significant correlations were obtained (p<0.001), values varied from r=0.427 between butterfat and lactose percentages to r=0.911 between lactose and solids non-fat percentages.