E. Popescu


STUDY REGARDING MORPHOLOGICAL AND PRODUCTIVE FEATURES IN HIGH MILK PRODUCTION BLACK AND WHITE ROMANIAN COWS FROM S.C.D.C.B. DANCU, IASI

E. Popescu, Mariana Sofronie, L. Dascalu, Elena Ruginosu, Anca Plavanescu, St. Creanga, M. Pîntea

Abstract
The study was made on 24 Black and White Romanian cows from S.C.D.C.B. Dancu, Iasi in 2008. The purpose of our research was to monitor the level of milk production and the amelioration level of the population. The maximum production of milk was registered in the fourth lactation (7831.5 Kg) and the minimum production was registered in the third lactation (6692,84 Kg) showing a medium to large variability coefficient.
The corporal growth is good, with a medium value of 139 cm for hight and 617,75 Kg for weight.
The milk quantity has a medium genetic determinism (h2=0.33) and the qualitative features have an intense genetic determinism (h2=0,81 – 0,77). For corporal growth the heritability coefficient has an intermediate value (h2=0,41 – 0,45).
The BNR population from S.C.D.C.B. Dancu Iasi has a good productive performance, these beeing improved through a continuity of selection activity and a minimization of the environmental features’ influency, as well.

Key words: amelioration, heritability, variability