Published in Scientific Papers. Series D. Animal Science, Vol. LX
Written by Dana BARBA, Gabriela-Lucica MARGARIT, Radu TOMA, Diana CONSTANTINESCU- GROPOSILA
This paper presents Romanian Black Spotted characters regarding repeatability parameter for the development, reproduction and milk production at the Pantelimon and Mogosoaia farms. The milk production is the main target when we follow the goal of milk production exploitation from those two farms. From the repeatability character point of view, the quantitative characters can be divided in three categories: strong repeatability characters, when the repeatability coefficient is higher than 0.50 (milk production quality acquiring), medium repeatability characters when the repeatability coefficient is between 0.20 and 0.50 (milk production quantitative acquiring), poor repeatability characters when the repeatability coefficient is lower than 0.20 (reproduction characters and general biologic acquiring characters). The repeatability for milk quantity has different values for Pantelimon farm (0.484±0.11) and Mogosoaia farm (0.430±0.15); we found similar values like other authors for Romanian Black Spotted population. The study conduct by us revealed lower values for repeatability at the fat percent (0.430±0.17 - Pantelimon farm and 0.380±0.17 – Mogosoaia farm) comparative with those from the profile literature: Cacula et al .(1968)-0.780, Alexoiu (1983) – 0.690, Murat (1985) – 0.710; exception being the values calculated by Georgescu (1984) – 0.220. The repeatability characters for milk production determined by us at the Romanian Black Spotted cattle population from our study is alike with the values write in the profile literature, exception being the fat percent, which is lower.
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