ANÁLISE MULTIVARIADA NA PRODUÇÃO E QUALIDADE DO LEITE DE VACAS CRUZADAS

Abstract

It was used for this data database with bovine milk production records, provided by Samet Embryos Farm, located in the municipality of Morrinhos, Goiás, with lactation data of 212 cows in different degrees of Dutch-zebu blood (Girolando ). all under pasture. There were 66 1/2 half blood cows, 80 3/4 cows, 61 5/8 cows and 5 7/8 cows. The characteristics used in the study were: 305-day corrected milk (PPL), number of births (TPN), age at first calving (PPI), percentage of average protein (PPM), percentage of average fat It measures the average per day (KPM), without average action (KGM), without milk. For the production of milk, the data of a lactation were considered, in 305 days of production. As the vacuities have not been up to 305 days, a correction was used according to REBOUÇAS et al. (2008). The PPM, PGM, KGM and KPM variables had their values corrected according to the same corrections for the quantity of milk produced in 305 days. For analysis of association, canonical correlation analysis was used between groups of characteristics. The results showed that production characteristics and milk quality are dependent, so both characteristics are influenced. Among the variables, LAC and KGM were the most important, since they presented more significant values of correlation of milk production and quality, respectively. The selection for higher lactation adjusted for 305 days will provide greater fat production (KGM) and consequently, increase of other variables analyzed and that are involved in milk quality.