Environmental Correlations in Pedigree Estimates of Breeding Value

Abstract

Effects of environmental correlations among the records of ancestors of bulls in artificial breeding were evaluated with data from the :Holstein-Friesian Association of America. Formulas developed for the variances and covariances of means of records and progeny group means included the effects of distribution of records in both herds and year-seasons. Selection index procedures were used to estimate the breeding value of bulls from ancestor information.