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Full-Text Articles in Life Sciences
Comparison Of Methods Of Predicting Breeding Values Of Swine, J. W. Keele, R. K. Johnson, L. D. Young, T. E. Socha
Comparison Of Methods Of Predicting Breeding Values Of Swine, J. W. Keele, R. K. Johnson, L. D. Young, T. E. Socha
Department of Animal Science: Faculty Publications
Best linear unbiased predictions (BLUP) using information from all known relatives; selection index using phenotype, full-sib average and half-sib average; and phenotypic deviation from contemporary group average were compared as methods of predicting breeding values for days to 100 kg and backfat. Swine records (n = 203,869) from five Hampshire, one Duroc and six Yorkshire herds were obtained from the Nebraska SPF Swine Accrediting Agency. Heritability values used to compute BLUP or index were either estimates based on within-breed offspring on parent regression or values recommended by the National Swine Improvement Federation (NSIF) guidelines. Within-breed estimates of heritability ranged from …
Foraging Quality And Performance Of Yearlings Grazing Switchgrass Strains Selected For Differing Digestibility, Bruce Anderson, J. K. Ward, K. P. Vogel, M. G. Ward, Francis A. Haskins, Herman J. Gorz
Foraging Quality And Performance Of Yearlings Grazing Switchgrass Strains Selected For Differing Digestibility, Bruce Anderson, J. K. Ward, K. P. Vogel, M. G. Ward, Francis A. Haskins, Herman J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
Switchgrass (Panicum virgatum) is a native, perennial warm-season grass commonly used as summer pasture. Three strains of switchgrass with different in vitro DM disappearance (IVDMD) values were evaluated with yearling cattle (Bos taurus) in three replicated grazing trials. All strains were similar in genetic background, maturity and yield potential. 'Trailblazer' (high-IVDMD) resulted in higher (P < .05) ADG than 'Pathfinder' and 'low-IVDMD'. Available forage of Trailblazer had higher IVDMD than Pathfinder and low-IVDMD. The IVDMD differences among strains were similar throughout the season; IVDMD declined between 0.3 and 0.5 percentage units per day. Forage availability, CP, NDF and ADF, permanganate lignin and ash were similar among strains. This study documents that plant breeders can select switchgrass plants for higher IVDMD and that strains consisting of progeny of these plants can result in higher animal gains than strains consisting of progeny of unselected or low-IVDMD plants with similar genetic background, forage yield, maturity, morphology and chemical composition.
Forage Quality And Performance Of Yearlings Grazing Switchgrass Strains Selected For Differing Digestibility, Bruce Anderson, J. K. Ward, K. P. Vogel, M. G. Ward, Herman J. Gorz, Francis A. Haskins
Forage Quality And Performance Of Yearlings Grazing Switchgrass Strains Selected For Differing Digestibility, Bruce Anderson, J. K. Ward, K. P. Vogel, M. G. Ward, Herman J. Gorz, Francis A. Haskins
Department of Agronomy and Horticulture: Faculty Publications
Switchgrass (Panicum virgatum) is a native, perennial warm-season grass commonly used as summer pasture. Three strains of switchgrass with different in vitro DM disappearance (IVDMD) values were evaluated with yearling cattle (Bos taurus) in three replicated grazing trials All strains were similar in genetic background, maturity and yield potential. 'Trailblazer' (high-IVDMD) resulted in higher (P < .05) ADG than 'Pathfinder' and 'low-IVDMD'. Available forage of Trailblazer had higher IVDMD than Pathfinder and low-IVDMD. The IVDMD differences among strains were similar throughout the season; IVDMD declined between .3 and .5 percentage units per day. Forage availability, CP, NDF and ADF, permanganate lignin and ash were similar among strains. This study documents that plant breeders can select switchgrass plants for higher IVDMD and that strains consisting of progeny of these plants can result in higher animal gains than strains consisting of progeny of unselected or low-IVDMD plants with similar genetic background, forage yield, maturity, morphology and chemical composition.