We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
KARVIŲ MELŽIMO GREIČIO PAVELDIMUMO IR FENOTIPINĖS BEI GENETINĖS KORELIACIJOS SU PRODUKTYVUMU, PIENO SUDĖTIMI IR SOMATINĖMIS LĄSTELĖMIS TYRIMAI.
- Authors
Juozaitienė, Vida; Japertienė, Renata
- Abstract
The aim of performed study was to determine the milking speed heritability and fenotypic and genetic correlation with productivity, milk yield and somatic cell count in Lithuanian Black-and White cows. The experiment on 2799 Black-and-White cows in 13 farms was performed. Milking speed heritability was estimated by model using fixed lactation and random lactation day, herd - year - season and additive - genetic sire effects. Variation of investigated traits heritability was from 0.118 to 0.232. Analyze of phenotypic correlation showed positive and statistical significant (p<0.001) correlation coefficients between milkability traits. Statistical significant positive (p<0.001) correlations were estimated between milk yield and milkability traits (rp = 0.179 - 0.442). Correlation between somatic cells count in cows milk, high milk flow and milking speed was negativly statistical significant (rp = -0.039, p<0.05). Analyze of genetic correlation showed strong positive genetic correlation (rg = 0.673 - 0.872, p<0.001) between milkability traits. Positive statistical significant correlation was between milk yield and milking speed (rg = 0.290 - 0.421, p<0.001). Genetic correlation between somatic cells count in cows milk and milkability traits was fractionally positive statistical significant (rg = 0.024 - 0.031; p<0.05). These results demonstrate that it is appropriate to perform mass cows selection and genetic evaluation by BLUP method of milkability traits in the entire country.
- Subjects
LITHUANIA; COWS; MILK yield; MILKING; LACTATION; DAIRY cattle feeding &; feeds
- Publication
Veterinarija ir Zootechnika, 2010, Vol 50, Issue 72, p35
- ISSN
1392-2130
- Publication type
Article