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Using Wood’s function to estimate phenotypic correlations among lactation curve parameters in Iranian first lactation buffaloes

Published online by Cambridge University Press:  23 November 2017

H. Farhangfar ,
P. Rowlinson  and
J. Rahmaninia
H. Farhangfar*
Affiliation:
Birjand University, Birjand, Iran
P. Rowlinson
Affiliation:
University of Newcastle upon Tyne, Newcastle upon Tyne, United Kingdom
J. Rahmaninia
Affiliation:
Zabol University, Zabol, Iran
*
Email:[email protected]
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Extract

In dairy farm animals, production of milk and its components varies in a curvilinear pattern over the course of the lactation. Knowledge of the lactation curve may provide a worthwhile information source about the pattern of milk production which in turn could be used for herd management decisions. Moreover, inter-relationships among lactation curve parameters could be utilised in applied animal breeding programmes to change more effectively the shape of the lactation. Many studies have been undertaken to apply different mathematical models to obtain more accurate prediction of the shape of the lactation curve among which the incomplete gamma function first proposed by Wood (1967) has been broadly used by previous research workers (Rekaya et al., 2000; Tekerli et al., 2000). The main objective of the present research was to apply Wood’s function for estimating phenotypic correlations among lactation curve parameters in Iranian first lactation buffaloes.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2007 , April 2007 , pp. 154
Copyright
Copyright © The British Society of Animal Science 2007

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References

Rekaya, R., Carabano, M.J., and Toro, M.A. 2000. Bayesian analysis of lactation curves of Holstein-Friesian cattle using a nonlinear model. Journal of Dairy Science 83:2691–2701.CrossRefGoogle ScholarPubMed
Tekerli, M., Akinci, Z., Dogan, I., and Akcan, A. 2000. Factors affecting the shape of lactation curves of Holstein cows from the Balikesir province of Turkey. Journal of Dairy Science 83: 1381–1386.CrossRefGoogle ScholarPubMed
Wood, P.D.P. 1967. Algebraic model of the lactation curve in cattle. Nature 216:164–165.CrossRefGoogle Scholar