Relationships between performance test traits (growth rate, backfat thickness, loin depth, lean meat percentage, exterior, phenotypic selection index) and longevity traits (length of productive life, number of litters, total number of weaned pigs, number of weaned piglets per year, number of litters per year) in Landrace sows were evaluated using canonical correlation analysis. The data set consisted of 23,012 purebred sows that farrowed from 1994 to 2011 in 161 herds. The first three canonical correlations (0.37, 0.25, 0.07) were highly significant (P<0.0001). Correlations of the first canonical variate with the original measured variables indicated that sows with high values for this variate had lower growth rate (r=-0.31) and loin depth (r=-0.43), greater backfat thickness (r=0.23), as well as being older at birth of their last litter (r=0.98). These sows also had a greater number of litters (r=0.94) and better lifetime efficiency (r=0.61 and r=0.70 for number of weaned piglets per year and number of litters per year, respectively). Canonical loadings for the second canonical function indicate that sows with high values for the second set of variates had high growth rate (r=0.79) and phenotypic selection index (r=0.83), excellent conformation (r=0.62), as well as better efficiency in pig production (r=0.67). The squared multiple correlations show that the first canonical variate of the performance traits is a poor predictor of longevity (0.13) and nearly useless for predicting efficiency traits (0.07). Performance test traits explain 11% of the variance in the variables of longevity and lifetime productivity, whereas dependent variables explain only 3% of the variance in performance test traits. The relationships between performance test data and subsequent lifetime productivity or longevity were significant and unfavourable but low for Polish Landrace population
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Abell C.E, Mabry J.W., Dekkers J.C.M., Stalder K.J. (2012). Genetic and phenotypic relationships among reproductive and post-weaning traits fromacommercial swine breeding company. Livest. Sci., 145: 183-188.
Fernàndezde Sevilla X., Fàbrega E., Tibau J., Casellas J. (2008). Effect of leg conformation on survivability in Duroc, Landrace and Large White sows. J. Anim. Sci., 86: 2392-2400.
Flisar T., Malovrh Š., Urankar J., Kovač M. (2012). Effect of gilt growth rate and backfat thickness on reproductive performance. Proc. 20th International Symposium “Animal Science Days”, 19-21.09.2012, Kranjska Gora, Slovenia, pp. 199-203.
Gill P. (2007). Nutritional management of the gilt for lifetime productivity - feeding for fitness or fatness? Proc. London Swine Conference, 3-4.04.2007, London, Ontario, pp. 83-99.
Hoge M.D., Bates R.O. (2011). Developmental factors that influence sow longevity. J. Anim. Sci., 89: 1238-1245.
Holm B., Bakken M., Klemetsdal G., Vangen O. (2004). Genetic correlations between reproduction and production traits in swine. J. Anim. Sci., 82: 3458-3464.
Johnson Z.B., Nugent R.A. (2008). Relationships between performance test traits and lifetime productivity traits in four breeds of swine. Ark. Agri. Exp. Sta. Res., Series, 563: 122-125. Knauer M., Stalder K.J., Serenius T., Baas T.J., Berger P.J., Karriker L., Good - win R.N., Johnson R.K., Mabry J.W., Miller R.K., Robinson O.W., Tokach M.D. (2010). Factors associated with sow stayability in 6 genotypes. J. Anim. Sci., 88: 3486-3492.
Lewis C.R.G., Bunter K.L. (2011). Body development in sows, feed intake and maternal capacity. Part 1: performance, pre-breeding and lactation feed intake traits of primiparous sows. Animal, 5: 1843-1854.
López- Serrano M., Reinsch N., Looft H., Kalm E. (2000). Genetic correlations of growth, backfat thickness and exterior with stayability in large white and landrace sows. Livest. Prod. Sci., 64: 121-131.
Lucia T., Dial G.D., Marsh W.E. (2000). Lifetime reproductive performance in female pigs having distinct reasons for removal. Livest. Prod. Sci., 63: 213-222.
Rencher A.C. (2002). Methods of Multivariate Analysis. New York, John Wiley and Sons, 2nd ed.
Rozeboom D.W., Pettigrew J.E., Moser R.L., Cornelius S.G., Kandelgy S.M. (1996). Influence of gilt age and body composition at first breeding on sow reproductive performance and longevity. J. Anim. Sci., 74: 138-150.
Serenius T., Stalder K.J. (2004). Genetics of length of productive life and lifetime prolificacy in the Finish Landrace and Large White pig populations. J. Anim. Sci., 82: 3111-3117.
Serenius T., Stalder K.J. (2007). Length of productive life of crossbred sows is affected by farm management, leg conformation, sow’s own prolificacy, sow’s origin parity and genetics. Animal, 1: 745-750.
Serenius T., Stalder K.J., Baas T.J., Mabry J.W., Goodwin R.N., Johnson R.K., Ro - bison O.W., Tokach M., Miller R.K. (2006). National Pork Producers Council Maternal Line National Genetic Evaluation Program: Acomparison of sow longevity and trait associations with sow longevity. J. Anim. Sci., 84: 2590-2595.
Stalder K.J., Knauer M., Baas T.J., Rothschild M.F., Mabry J.W. (2004). Sow longevity. Pig News and Information, 25: 53N-74N.
Stalder K.J., Saxton M., Conaster G.M., Serenius T.V. (2005). Effect of growth and compositional traits on first parity and lifetime reproductive performance in U.S. Landrace sows. Livest. Prod. Sci., 97: 151-159.
Tarrés J., Tibau J., Piedrafita J., Fàbrega E., Reixach J. (2006 a). Factors affecting longevity in maternal Duroc swine lines. Livest. Sci., 100: 121-131.
Tarrés J., Bidanel J.P., Hofer A., Ducrocq V. (2006 b). Analysis of longevity and exterior traits on Large White sows in Switzerland. J. Anim. Sci., 84: 2914-2924.
Tholen E., Bunter K.L., Hermesch S., Graser H.U. (1996). The genetic foundation of fitness and reproduction traits in Australian pig populations. 2. Relationships between weaning to conception interval, farrowing interval, stayability and other common reproduction and production traits. Aust. J. Agric. Res., 47: 1275-1290.
Tummaruk P., Lundeheim N., Einarsson S., Dalin A.M. (2001). Effect of birth litter size, birth parity number, growth rate, backfat thickness and age at first mating of gilts on their reproductive performance as sows. Anim. Reprod. Sci., 66: 225-237.
Yazdi M.H., Rydhmer L., Rindgmar - Cederberg E., Lundeheim N., Johansson K. (2000). Genetic study of longevity in Swedish Landrace sows. Livest. Prod. Sci., 63: 255-264.