Estimation of genetic and phenotypic parameters for first three lactation profitability in Iranian Holstein cows

Document Type : Research Paper

Authors

1 Former M.Sc. Student, Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Iran

2 Assistant Professor, Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Iran

3 Associated Professor, Department of Animal Science, College of Agriculture, Shiraz University, Iran

Abstract

Genetic and phenotypic parameters for the first three lactations profitability and sum of first three lactations as lifetime profitability in Iranian Holstein cows were estimated, using data of 86,065 cows in 423 herds, from 2000 to 2011 collected by the Animal Breeding Centre of Iran (ABCI). Economic data were collected from three large dairy farms in Isfahan province. Estimates were performed by using bivariate animal model through the VCE.6.2 software. Estimated heritabilities were moderate and ranged from 0.14 (for third lactation profitability) to 0.32 (for lifetime profitability). Estimated genetic correlations were close to one and ranged from 0.88 between first and third lactation profitability to 0.99 between second lactation profitability and lifetime profitability. Phenotypic correlations were high and in the range of 0.38 between first and third lactation profitability to 0.82 between second lactation profitability and lifetime. Genetic and phenotypic correlations between first lactation and lifetime profitability were 0.96 and 0.76, respectively. These high values of correlations and heritabilities obtained for the first lactation profitability (0.31) showed that the profitability of the first lactation might be a good predictor of lifetime profitability. Therefore, by direct selection on first lactation profitability, genetic-economic merit could be improved.

Keywords

References

  1. Azizzadeh, M. (2011). Characterisation and pattern of culling in Holstein-Friesian dairy herds in
  2. Khorasan Razavi Province, Northeast of Iran. Veterinary Research Forum, 2(4), 254- 258.
  3. Balaine, D. S., Pearson, R. E. & Miller, R. H. (1981). Profit Functions in Dairy Cattle and Effect of Measures of Efficiency and Prices. Journal of Dairy Science,64(1), 87- 95.
  4. Beaudry, T. F., Cassell, B. G. & Norman, H. D. (1988). Relationships of lifetime profit to sire evaluations from first, all, and later records. Journal of Dairy Science, 71, 204- 213.
  5. Dadpasand, M., Miraei-Ashtiani, S. R., Moradi Shahrebabak, M. & Vaez Torshizi, R. (2008) Impact of conformation traits on functional longevity of Holstein cattle of Iran assessed by a Weibull proportional hazards model. Livestock Science, 118(3), 204- 211.
  6. Forabosco, F., Bozzi, R., Boettcher, p., Filippini, F., Bijma, P. & Van Arendonk, J. A. M. (2005). Relationship between profitability and type traits and derivation of economic values for reproduction and survival traits in Chianina beef cows. Journal of Animal Science, 83, 2043-2051.
  7. Ghorbani, G. R. & Khosravinia, H. K. (2007). Principle of Dairy Science. (2nd ed.). (in Farsi)
  8. Haan, M. H. A. d., Cassell, B. G., Pearson, R. E. & Smith, B. B. (1992). Relationships between net income, days of productive life, production, and linear type traits in grade and registered Holsteins. Journal of Dairy Science, 75, 3553-3561.
  9. Perez- Cabal, M. A., Hernandez, D., Alenda, R., Carabano, M. J. & Charfeddine, N. (1999). Genetic analysis of true profit for Spanish dairy cattle. Workshop on Genetic Improvement of Functional Traits in Cattle. Breeding Goals and Selection Schemes Wageningen, The Netherlands, INTERBULL Bull, 23, 107-113.
  10. Perez-Cabal, M. A. & Alenda, R. (2002). Genetic relationships between lifetime profit and type traits in Spanish Holstein cows. Journal of Dairy Science,85, 3480-3491.
  11. Perez-Cabal, M. A. & Alenda, R. (2003). Lifetime profit as an individual trait and prediction of its breeding values in Spanish Holstein cows. Journal of Dairy Science, 86, 4115-4122.
  12. Perez-Cabal, M. A., Garcia, C., Gonzalez-Recio, O. & Alenda, R. (2006). Genetic and phenotypic relationships among locomotion type traits, profit, production, longevity, and fertility in Spanish dairy cows. Journal of Dairy Science, 89, 1776-1783.
  13. Sadeghi-Sefidmazgi, A., Moradi-Shahrbabak, M., Nejati-Javaremi, A., Miraei-Ashtiani, S. R. & Amer, P. R. (2012). Breeding objectives for Holstein dairy cattle in Iran. Journal of Dairy Science,95, 3406-3418.
  14. Shadparvar, A. A. & Nikbin, S. (2008). Optimum model for analyzing lifetime profitability of Holstein cows. Asian-Australian Journal of Animal Science, 21(6), 769-775.
  15. Smith, L. A., Cassell, B. G. & Pearson, R. E. (1998). The effects of inbreeding on the lifetime performance of dairy cattle. Journal of Dairy Science, 81, 2729-2737.
  16. VanRaden, P. M. (2004). Invited Review: Selection on net merit to improve lifetime profit. Journal of Dairy Science, 87, 3125-3131.
  17. Visscher, P. M. & Goddard, M. E. (1995). Genetic analyses of profit for Australian dairy cattle. British Society of Animal Science, 61, 9-18.
  18. Vollema, A. R. (1998). Longevity of dairy cows: a review of genetic variances and covariances with conformation. Animal Breeding, Abstract, 66, 781-802.

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History

  • Receive Date: 22 September 2015
  • Revise Date: 31 July 2016
  • Accept Date: 28 February 2017

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