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The Role of Maternal Effects in Animal Breeding: III. Biometrical Aspects of Maternal Effects in Animals^{1, 2,}

Iowa State University, Ames 50010

Abstract

This paper develops the biometrical aspects of traits having a direct and a maternal effect. Also the influence of a grand maternal effect is considered in conjunction with the direct and maternal effect. The theoretical expectations of several common covariances between relatives are derived from a general linear formulation that involves the relationships of the contributing individuals and the relevant genic variances and covariances.

¹ Presented at a symposium on The Role of Maternal Effects in Animal Breeding sponsored by the American Society of Animal Science, August 3, 1971, University of California, Davis.

² Journal Paper No. J-7025 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 1704.

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