STUDY ON THE
PERFORMANCE OF MILK PRODUCTION AND GENETIC PARAMETERS IN A HERD OF FLECKVIEH
COWS EXPLOITED IN A FARM FROM THE NORTH-EAST OF ROMANIA
Gabriela AMARIȚII [1], Andra – Sabina NECULAI – VĂLEANU [2],
Felicia ȚENU[3],Vasile MACIUC [4]
Abstract. The present study analyzes the level of productions achieved in a herd of
Fleckvieh cows in normal lactations and the values of the genetic parameters.
The statistical estimators were calculated with the S.A.V.C. computer program
and the genetic parameters were estimated using the REML method. In the case of
normal lactations, the highest production average is 7,122.91 kg reached in the
third lactation, with 4.14% fat content and 2.99% protein. The heritability of
milk production is 0.21 and this character is genetically correlated very
strongly with the amount of fat and that of the protein, the coefficient value
being 0.99 and respectively 0.88. The average productions of the cows are very
good but all values are inferior compared to those in the ancestry, where for
father's mother are the highest, 10,929.47 kg. Then cows do not phenotypically
express their genetic potential due to the influence of external environmental
factors.
Keywords: Fleckvieh, phenotype, variability,
heritability, correlations.
DOI 10.56082/annalsarsciagr.2024.2.108
Abstract
Article
Volume
13 No 2 – 2024