ANALYSIS CONCERNING THE INFLUENCE OF COLOUR GENES IN KARAKUL SHEEP ON MILK PRODUCTION

The purpose of this paper is to verify if the genes that determine the colour of lamb pelts of Karakul type influences the milk production. In other words, we have seen if the lamb pelt colours are associated with characters related to milk production. The biological material was composed of sheep population belonging to the Botosani Karakul breed. Sheep of the six colour varieties of this breed were taken in the experiment. The experimental conditions were assured equally for all sheep varieties. The first mathematical processing is a statistical description of the data depending on colour groups. The statistical description refers to the calculation of statistical parameters (average, standard deviation etc.). The average variation of colour groups was graphically represented. The representation was made also as a histogram depicting the standard deviation, too. The variance analysis was performed. Two homogeneity tests of variance are used to see the legitimacy of the analysis of variance: Leaven and Brown- Forsthe; the relation between average and standard deviation was graphically represented to see if it is linear. Comparative analysis of averages was done with different test: LSD, Sheff, Newman-Keuls, Duncan, Tukey. Data processing was performed with a statistical program. Analysis of variance shows that, in general, the colour of hair fibre does not significantly influence the milk production.