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2006
C. Y. Chen, Johnson, R. K., Kachman, S. D., and van Vleck, L. D., Estimation of variance components due to competition effects for selected lines of swine., Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, p. 17.03, 2006.
J. Holl, Vukasinovic, N., Clutter, A. C., Kachman, S. D., and Johnson, R. K., Fine mapping to confirm and identify reproductive QTL in research pig populations., Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, p. 22.08, 2006.
1998
R. K. Johnson and Cassady, J. P., Fourteen generations of selection for ovulation rate, embryonal survival and litter size: responses and genetic relationships., vol. 23: Opening; plenary; technology transfer; beef cattle; dairy cattle; pigs., pp. 636–639, 1998.
1994
D. Casey, Rathje, T. A., and Johnson, R. K., Response to ten generations of index selection for components of litter size in swine., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. 17. Genetics and breeding of dairy and beef cattle, swine and horses, pp. 315–318, 1994. (292.49 KB)
K. A. Leymaster and Johnson, R. K., Second thoughts on selection for components of reproduction in swine., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. 17. Genetics and breeding of dairy and beef cattle, swine and horses, pp. 307–314, 1994. (453.12 KB)
1990
L. T. Gama, Harder, R. R., and Johnson, R. K., Changes in ovulation rate and uterine capacity in swine selected for litter size., vol. XVI. Poultry, fish and horse genetics and breeding, growth and reproduction, immune response and disease resistance., pp. 351–357, 1990. (106.47 KB)
1986
A. C. Clutter, Nielsen, M. K., and Johnson, R. K., Alternative methods of selection for litter size in mice., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. XI. Genetics of reproduction, lactation, growth, adaptation, disease, and parasite resistance., pp. 215–219, 1986. (1.33 MB)
S. M. Neal and Johnson, R. K., Selection for components of litter size in swine: Genetic parameters and expected response., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. XI. Genetics of reproduction, lactation, growth, adaptation, disease, and parasite resistance., pp. 228–233, 1986. (1.41 MB)