SVIBOR - Project code: 4-05-025


Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69


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Project code: 4-05-025

Effects of milk protein genotype on milk: milk yield, fat, protein, casein

Main researcher: LUKAČ-HAVRANEK, JASMINA (74232)

Type of research: applied
Duration from: 02/01/91. to 12/31/95.

Papers on project (total): 13
Institution name: Agronomski fakultet, Zagreb (178)
Department/Institute: Dairy Science Department
Address: Svetošimunska 25
City: 10000 - Zagreb, Croatia
Phone: 385 (0)1 233-50-77 /2108
Fax: 385 (0)1 215-300
Phone: 385 (0)1 233-50-77/2108
Fax: 385 (0)1 215-300

Summary: In countries with the most developed agriculture, quantity of protein is the most valuable component of milk. Unfortunately, Croatia didn't follow her neighbors (European countries with developed agriculture) and evaluates milk on the basis of milk and fat quantity. However, the value of milk protein is not only quantitative, so in the last decades investigations concerning milk protein polymorphisms as milk protein qualitative value instigates attention in many countries. Milk protein genetic variants have been shown to be associated with milk production and manufacturing properties of milk but results are not consistent. It is generally assumed that genetic variant k- casein B and á-lactoglobulin B have better manufacturing properties and better randman in cheese production although there are different reports. There are many reports of association between milk protein genetic variants and milk production and because results are contradictory from population to population final explanation of these associations is not reached yet. Some theoretical explanations allow different associations of the same genetic variants concerning them as a property of certain population. In our project we want to investigate the effects of milk protein polymorphism for main cattle breeds in Croatia and to determine could we and how make economic benefit from their effects on milk production and manufacturing properties of milk.

Keywords: milk protein polymorphisms, Simmental, genetic polymorphisms, isoelectric focusing, bovine, milk, milk performance, cattle, casein, lactoglobulin

Research goals: The aim of present project was to evaluate the effects of milk protein polymorphisms in cattle and to estimate is it possible to utilize those effects for improvement of milk production and milk as a row material for dairy industries. To fulfill our aim it is necessary; - to study investigations of other authors dealing with the same or similar problems, - to examine gene and genotype frequencies of milk protein loci for the main cattle breeds in Croatia, - to investigate the effects of genes and genotypes of milk proteins on the milk composition and production, - to investigate the effects of genes and genotypes of milk proteins on the other factors correlated with milk composition and production.


  1. Name of project: 4-05-027 Genetski polimorfizmi i zbirka gena pasmina domaćih životinja u Hrvatskoj
    Name of institution: Agronomski fakultet, Sveučilišta u Zagrebu, Zavod za specijalno stočarstvo
    City: 10000 - Zagreb, Croatia


  1. Name of institution: Laboratory of Dairy Science, Institute of Food Science Swiss Federal Institute of Technology, prof. dr. Z. Puhan
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of information
    City: 8092 - Zurich, Swiss

  2. Name of institution: Instituto Lattiero Caseario e di Biotechnologie Agro-Alimentari di Thiene
    Type of institution: State institute
    Type of cooperation: Systematic exchange of information
    City: 36016 - Thiene, Italia

  3. Name of institution: Imunološki zavod, d.d. Rockfellerova 2
    Type of institution: Economical/Production
    Type of cooperation: Other
    City: 10000 - Zagreb, Croatia

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Last update: 10/13/95