PHENOTIPIC CORRELATIONS AMONG COUPLE OF CHARACTERS IN DAIRY ROMANIAN BLACK SPOTTED BREED FROM PESTREŞTI-ALBA FARM

Abstract

Phenotypic correlations among milk yield, fat yield and protein yield were estimated using an animal model and records of 101 cows enrolled in the SC Dorin&Sanda SRL farm, Petreşti-Alba. Among the productive traits investigated, the highest correlation was observed between the milk and fat yields 0.98. Between milk yield and protein yield coefficient correlation was 0.97, and also 0.97 between fat yield and protein yield. It was concluded that these phenotypic parameters could be used for the genetic evaluation of dairy cattle in Romania. Regression coefficients among the three couple of traits indicate the same high and positive values. The yield traits (kg) are all positively related.

Keywords

• milk
• fat
• protein
• yield
• correlations