An Alternative Model for Additive and Cytoplasmic Genetic and Maternal Effects on Lactation

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Abstract
Results from a recent study that presented evidence suggesting a lack of cytoplasmic inheritance of lactation traits were reexamined using a model that included effects of additive genotype, cytoplasmic genotype, their interaction, and maternal influences. Under this model, equivalent estimated of heritability from daughter-dam and granddaughter-granddam regression that exceed those from paternal half-sib correlation were consistent with the presence of cytoplasmic inheritance of lactation traits awaits a designed experiment, likely employing transfer of identical nuclei into varying cytoplasmic backgrounds.