Relationship between milk production system and milk traits and somatic cell counts in Brazilian Murrah buffaloes: a multivariate analysis

Abstract

The purpose of this study was to evaluate the monthly milk production and quality of buffaloes from two milk production systems in the Brazilian northeast using the multivariate analysis: principal component analysis (PCA). A total of 2,506 individual milk recordings were performed in two production systems, containing information on milk production (kg day-1), fat, protein, lactose and total solids counts and somatic cell count (SCC). There were positive correlations between the fat content and the contents of total solids (TS) and protein, and of TS and protein. From the PCA, two main components (PC1 and PC2) were identified, explaining 67.71% of the total variation. The fat, protein, lactose and ST level, represented by PC1, explain 46.18% of the total variance, and were an indicator of milk nutritional quality. The CP2, composed of milk production, SCC and production systems, explains 21.53% of the total variance, and was indicative of herd health. PCA results may be useful in dairy buffalo breeding programs, and a reduced number of variables are necessary to assess the nutritional quality of milk and herd health.

Milk somatic cell count-derived traits as new indicators to monitor udder health in dairy buffaloes

“…The inverse relationship between LP and SCS has been widely described in the literature for dairy species (Fox et al 2015;Costa, Lopez-Villalobos, Sneddon, et al 2019) and indicates that LP tends to drop in presence of high SCC (udder inflammation). Barbosa et al (2019) estimated a similar correlation (À0.23) in Brazilian Murrah buffalo. In the study of correlations were calculated within subsets created on the basis of average lactation SCC.…”

Environmental Factors That Affect the Sanitary and Nutritional Variability of Raw Milk in Dual Purpose Livestock Systems of Colombian Orinoquia

“…The results of the association milk quality variables were similar to those found in crossbred dairy cattle [ 27 , 28 ]. The direct relationship between TS and fat, protein, lactose, SNF, F–P ratio, and minerals percentages are expected since fat, protein, lactose, and minerals make up the total milk solids.…”