In any genetic evaluation procedure connectedness among animals in different management groups (herds) is important in order to account for genetic differences among management groups. Kennedy and Trus (1991) mentioned that under an animal model (IAM), connections occur through the relationship matrix (A). They showed that connectedness can be measured in terms of the proportionate contribution of genes from one herd to the other. This is achieved by computing X1ZTQ, where X and Z are matrices that assign records to herds and animals respectively, Q a matrix that assigns ancestors of animals with records to a single genetic group and T is a lower triangular matrix derived from A, such that A = TDT1 , with D a diagonal matrix. In practice the calculation of T may not be feasible with large number of animals because of memory requirements.