E.C. Popescu


THE GENETICS PARAMETERS AND THE RANK OF AMELIORATION TO A BLACK AND WHITE ROMANIAN COWS RACE POPULATION

E.C. Popescu, V. Maciuc, Şt. Creangă, I. Glcă, V. Ujică

Abstract
The study was made to a BNR population bred in SCDCB Dancu conditions to estimate the genetic value of animals. Maximum lactation was the third lactation with an average of milk production of 6670 kg with 4.13% fat and 3.34% protein. It was analysed main genetic parameters for some morphologic and productive characters. Quantity of milk had a medium genetic determinism (h2=0.28), the qualitative milk traits was strongly determined with value of 0.64(h2) for fat content and 0.57 (h2) for protein content. Milk quantity is positively correlated and high intensity level with fat and protein quantity (0.99 0.95). Correlation of milk quantity with qualitative characters of milk was negatives. Analyzing amelioration value of bulls for main characters take in study we observe that 17 of them are ameliorators for milk quantity noting the 51131 bull ameliorator for quantitative milk characters.

Key words: milk, heritability, correlation