STUDY ON PHENOTYPIC CORRELATIONS AMONG MILK PRODUCTION AND MILK CHEMICAL COMPOSITION

SIMONA BAUL, G. STANCIU, L. T. CZISZTER, S. ACATINCĂI, I. TRIPON, D. GAVOJDIAN, SILVIA ERINA, A. BOGNAR

Abstract


In this study, the phenotypic correlations among quantitative and qualitative indices of the milk production in Romanian Black and White cows from the Didactical far Timişoara were studied. Studies were carried out on 125 lactations from 92 cows. Correlations coefficients and their statistical significance were calculated. Correlations among the milk yield and the yield of milk chemical components were positive taking values over 0.900, and very significant (p<0.001). Correlations between milk yield and qualitative indices of milk (butterfat percentage, protein percentage, lactose percentage, solids non-fat percentage and total solids percentage) varied between r=-0.002 with butterfat percentage until r=0.187 with protein percentage, but the values did not reached the level of statistical significance (p>0.05). Among the percentage of milk constituents very significant correlations were obtained (p<0.001), values varied from r=0.427 between butterfat and lactose percentages to r=0.911 between lactose and solids non-fat percentages.


Keywords


phenotypic correlations; milk yield; milk chemical components; Romanian Black and White; cows

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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