PHENOTYPIC CORRELATION BETWEEN COUPLE OF MILK PRODUCTION TRAITS IN ROMANIAN SPOTTED BREED DAIRY HEIFERS FROM S.C. AGROSEM S.A. PIŞCHIA, TIMIŞ COUNTY

GH. NISTOR, ELEONORA NISTOR, V. BAMPIDIS, B. SKAPETAS

Abstract


The aim of the study was to establish the phenotypic correlations between milk yield parameters of 95 Romanian Spotted breed dairy heifers and their subsequent milk yield and composition in the first lactation. Correlation coefficients among estimated milk, fat and protein yields were high and almost the same. Between milk and fat yield there was a positive and very high correlation (r = 0.9873***). Also the correlation coefficient (r = 0.9719***) registered for the couple of traits milk and protein yield was high, while between fat and protein yield the correlation coefficient had a value of 0.9568***. The strong positive correlations among couple of traits show that these can be improved in the dairy heifers, using selection by independent culling levels.


Keywords


dairy heifers; correlations; milk; fat; protein

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
Phone: +40-256-277160, Fax.: +40-256-277110