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National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Sow Longevity And Trait Associations With Sow Longevity, T. Serenius, K. J. Stalder, T. J. Baas, J. W. Mabry, R. N. Goodwin, R. K. Johnson, O. W. Robison, M. Tokach, R. K. Miller
National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Sow Longevity And Trait Associations With Sow Longevity, T. Serenius, K. J. Stalder, T. J. Baas, J. W. Mabry, R. N. Goodwin, R. K. Johnson, O. W. Robison, M. Tokach, R. K. Miller
Department of Animal Science: Faculty Publications
Data from the National Pork Producers Council Maternal Line National Genetic Evaluation Program were used to compare longevity of sows from 6 commercial genetic lines and to estimate the phenotypic associations of sow longevity with gilt backfat thickness, ADG, age at first farrowing, litter size at first farrowing, litter weight at first farrowing, average feed intake during lactation, and average backfat loss during lactation. The lines evaluated were American Diamond Genetics, Danbred North America, Dekalb-Monsanto DK44, Dekalb-Monsanto GPK347, Newsham Hybrids, and National Swine Registry. The data set contained information from 3,251 gilts, of which 17% had censored longevity records (sows …
Correlated Responses In Maternal Performance Following Divergent Selection For Heat Loss In Mice, J. M. Mcdonald, Merlyn . K. Nielsen
Correlated Responses In Maternal Performance Following Divergent Selection For Heat Loss In Mice, J. M. Mcdonald, Merlyn . K. Nielsen
Department of Animal Science: Faculty Publications
Divergent selection in mice was applied in 3 independent replicates for high (maintenance high; MH) and low (maintenance low; ML) heat loss for 16 generations. An unselected control (maintenance control; MC) was also maintained in all replicates. Selection ceased for 26 generations; heat-loss measurement and selection resumed at generation 42. Lactation performance, dam weight, dam feed intake, and efficiency of production of pup weight were recorded or calculated for MH and ML dams in all 3 replicates at generation 46 or 47 with the objective of determining whether selection for heat loss has created correlated responses in maternal performance. One-half …