1. Abdolmohammadi, A. 2003. Estimation of genetic parameters for length of productive life and correlation with production traits in Iranian Holstein cattle. M.Sc. thesis, Tehran University, Karaj, Iran. 98 pp (In Persian).
2. Dahlin, A., U.N. Khan, A.H. Zafar, M. Saleem, M.A. Chaudhry and J. Philipsson. 1998. Genetic and environmental causes of variation in milk production traits of Sahiwal cattle in Pakistan. Journal of Animal Science, 66: 307-318. [
DOI:10.1017/S1357729800009437]
3. Dedkova, L. and J. Wolf. 2001. Estimation of genetic parameters for milk production traits in Czech dairy cattle populations. Czech Journal of Animal Science, 46: 298-307.
4. Dekkers, J.C.M., P.V. Birke and J.P. Gibson. 1995. Optimum linear selection indexes for multiple generation objectives with non-linear profit function. Journal of Animal Science, 61: 165-175. [
DOI:10.1017/S1357729800013667]
5. Garcia- Cortes, L.A., C. Moreno, L. Varona, M. Rico and J. Altarriba. 1995. Co-variance component estimation of yield traits between different using an animal model. Journal of Livestock Production Science, 43: 111-117. [
DOI:10.1016/0301-6226(95)00038-M]
6. Jahandar, M.H. 2002. Estimation of genetic and environmental trend for some production traits in Holstein cattle of Iran. M.Sc. thesis, Tehran University, Karaj, Iran. 135 (In Persian).
7. Kominakis, A., M. Volanis and M. Rogdakis. 2001. Genetic modeling of test day records in dairy sheep in using orthogonal Legendre polynomials. Small Ruminant Research, 39: 209-217. [
DOI:10.1016/S0921-4488(00)00191-7]
8. Motamedi, M.M., F. Eftekhar Shahroodi, R. Valizadeh, H. Farhangfar, M. Bashtani and H. Naeemipoor. 2011. Estimation of genetic parameters for some production and reproduction traits in a herd of Holstein cow. Journal of Animal Science (Pajouhesh and Sazandegi), 90: 22-27 (In Persian).
9. Razavi, M., M. Vatankhah, H.R. Mirzaee and M. Rokuee. 2007. Estimation of genetic trends for production traits of Holstein cattle in Markazi province. Journal of Pajouhesh and Sazandegi, 77: 55- 62.
10. Rostami-Angasi, M. and A. Soudagar-Amiri. 2009. Estimation of genetic parameters for production trait in Holstein dairy cattle in Sari. Journal of Animal Science, 3: 35- 41.
11. Safi Jahanshahi, A., R. Vaez Torshizi, N. Emam Jomae Kashan and M.B. Sayad Nejad. 2003. Estimation of genetic parameters for milk production traits in Iranian Holstein dairy cattle with different animal models. Iranian Journal of Agriculture Science, 34: 177-186 (In Persian).
12. Teimoorian, M., A.A. Aslami Nejad and M. Tahmoores Poor. 2011. Estimation of genetic parameters of production traits in Holstein cattle. Iranian Journal of Animal Science Research, 3: 179-184.
13. Wang, T., R.L. Fernando and S.D. Kachman. 2001. MATVEC User's guide. Version 1.03., Department of Biometry, University of Nebraska: Lincoln, USA.