Phenotypic Correlations among Milk Yield and Chemical Composition per Normal Lactation in Romanian Black and White Breed

Simona Baul, Ludovic Toma Cziszter, Stelian Acatincăi, Dinu Gavojdian, Iulian Tripon, Silvia Erina, George Gabriel Răducan

Abstract


In this study we have established phenotypic correlations between quantitative and qualitative indices of normallactation milk production in Romanian Black and White breed for 125 lactations. The correlation coefficients andtheir statistical significance were calculated with STATISTICA program. Between the amount of milk and chemicalcomponents from milk there were values of correlation coefficient over 0.900. Also, between these characters was avery significant positive correlation (p<0.001). The correlation between the quantity of milk and the indices of milkquality (fat percentage, protein percentage, lactose percentage, percentage of dry defatted matter and percentage oftotal solids) varies between r = -0.046 percentage of fat and r =0.126 between amount of milk and percentage of drydefatted milk. Those values are statistically insignificant (p>0.05). Between the percentage values of fat, protein,lactose, fat dry matter and total dry matter were obtained highly significant correlations (p <0.001), ranging fromr=0.510 between fat percentage and the percentage of lactose and r=0.883 between the percentage of defatted drymatter and total solids.

Keywords


chemical components; milk quantity; phenotypic correlations; Romanian Black and White breed

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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

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