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Effects Of Inbreeding And Heterozygosity On Preweaning Traits In A Closed Population Of Herefords Under Selection, L. Dale Van Vleck, M. D. Macneil
Effects Of Inbreeding And Heterozygosity On Preweaning Traits In A Closed Population Of Herefords Under Selection, L. Dale Van Vleck, M. D. Macneil
Department of Animal Science: Faculty Publications
Records of five inbred lines at the Livestock and Range Research Laboratory were used to evaluate effects of inbreeding and heterozygosity on preweaning traits. Members of each line were descendants of a single founder Hereford bull. A total of 8,065 records of birth weight and 7,380 records of preweaning daily gain and weaning weight were analyzed by derivative-free REML using a model that included fixed effects of sex, combination of year and month of birth and parity of dam, with covariates for direct and maternal genetic fractions of inheritance from the genetic groups, inbreeding, and heterozygosity fractions. Heterozygosity fractions were …