DU TOIT, J.; VAN WYK, J.B.
 andÂ
MAIWASHE, A.. Relationships between functional herd life and conformation traits in the South African Jersey breed. S. Afr. j. anim. sci. [online].
2012,
vol.42, n.1, pp. 47-54.
ISSN 0375-1589.
|
|
Bouška, J., Vacek, M., Štípková, M. & Nëmec, A., 2006. The relationship between linear type traits and stayability of Czech Flekvieh cows. Czech J. Anim. Sci. 51, 229-304. [ Links ] Buenger, A., Ducrocq, V. & Swalve, H.H., 2001. Analysis of survival in dairy cows with supplementary data on type scores and housing systems from a region of Northwest Germany. J. Dairy Sci. 84, 1531-1541. [ Links ] Caraviello, D.Z., Weigel, K.A. & Gianola, D., 2003. Analysis of the relationship between type traits, inbreeding, and functional survival in Jersey cattle using a Weibull proportional hazards model. J. Dairy Sci. 86, 2984-2989. [ Links ] Cassandro, M., Gallo, L., Carnier, P., Penzo, N. & Bittante, G., 1999.Collecting functional traits in dairy herds: overview of a program currently running in Italy. In: Proceedings International Workshop on EU Concerted Action on Genetic Improvement of Functional Traits in Cattle (GIFT); Breeding Goals and Selection Schemes 1999. http:www.interbull.slu.se/bulletins/bulletin23/. [ Links ] Cruickshank, J., Weigel, K.A., Dentine, M.R. & Kirkpatrik, B.W., 2002. Indirect prediction of herd life in Guernsey cattle. J. Dairy Sci. 85, 1307-1313. [ Links ] Du Toit, J., Van Wyk, J.B. & Maiwashe, A., 2009. Genetic parameter estimates for functional herd life for the South African Jersey breed using a multiple trait linear model. S. Afr. J. Anim. Sci. 39, 40-44. [ Links ] Groeneveld, E., Kovac, M. & Mielenz, N., 2010. VCE User's Guide and Reference Manual Version 6.0. ftp://ftp.tzv.fal.de/pub/vce6/doc/vce6-manual-3.1-A4.pdf [ Links ] Jairath, L., Dekkers, J.C.M., Schaeffer, L.R., Liu, Z., Burnside, E.B. & Kolstad, B., 1998. Genetic evaluation for herd life in Canada. J. Dairy Sci. 81, 550-562. [ Links ] Larroque, H. & Ducrocq, V., 2001. Relationships between type and longevity in the Holstein breed. Gent. Sel. Evol. 33, 39-59. [ Links ] Samoré, A.B., Rizzi, R., Rossoni, A. & Bagnato, A., 2010. Genetic parameters for functional longevity, type traits, somatic cell scores, milk flow and production in the Italian Brown Swiss. Italian J. Anim. Sci. 9, 145-151. [ Links ] Schneider, M.D., Diirr, J.W., Cue, R.I. & Monardes, H.G., 2003. Impact of type traits on functional herd life of Quebec Holsteins assessed by survival analysis. J. Dairy Sci. 86, 4083-4089. [ Links ] Short, T.H. & Lawlor, T.J., 1992. Genetic parameters of conformation traits, milk yield and herd life in Holsteins. J. Dairy Sci. 75, 1987-1998. [ Links ] Strapák, P., Candrák, J. & Aumann, J., 2005. Selection between longevity and selected production, reproduction and type traits. Czech J. Anim. Sci. 50, 1-6. [ Links ] Theron, H.E. & Mostert, B.E., 2004. Genetic analyses for conformation traits in South African Jersey and Holstein cattle. S. Afr. J. Anim .Sci. 34, 47-49. [ Links ] Tsuruta, S., Misztal, I. & Lawlor, T.J., 2005. Changing definition of productive life in US Holstein: Effect on genetic correlations. J. Dairy Sci. 88, 1156-1165. [ Links ] Van Niekerk, D.J., Neser, F.W.C & Erasmus, G.J., 2000. Genetic parameter estimates for type traits in the South African Jersey breed. S. Afr. J. Anim. Sci. 30, 186-192. [ Links ] Vollema, A.R. & Groen, A.B.F., 1997. Genetic correlations between longevity and conformation traits in an upgrading dairy cattle population. J. Dairy Sci. 80, 3006-3014. [ Links ] Vukasinovic, N., Moll, J. & Casanova, L., 2001. Implementation of a routine genetic evaluation for longevity based on survival analysis techniques in dairy cattle populations in Switzerland. J. Dairy Sci. 84, 2073-2080. [ Links ] Vukasinovic, N., Schleppi, Y. & Kunzi, N., 2002. Using conformation traits to improve reliability of genetic evaluation for herd life based on survival analysis. J. Dairy Sci. 85, 1556-1562. [ Links ] Weigel, K.A., Lawlor, T.J., Van Raden, P.M. & Wiggans, G.R., 1998. Use of linear type and production data to supplement early predicted transmitting abilities for productive life. J. Dairy Sci. 81, 2040-2044. [ Links ] Zavadilová, L., Nëmcová, E., Stípková, M. & Bouska, J., 2009. Relationships between longevity and conformation traits in Czech Fleckvieh cows. Czech J. Anim. Sci. 54 (9), 387-394. [ Links ] |
