“…Results for milk components were similar, except in herds with low variation coefficient, where the heritability estimates were slightly higher. Moita et al (2010) observed that when selecting animals without considering the variance heterogeneity tends to favor those belonging to high variance herds, to the detriment of lower phenotypic variability. They also noted that the stratification of the buffalo herds on high and low standard deviation corrected for variance heterogeneity.…”