Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-28T14:23:01.300Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimates of phenotypic and genetic parameters of some measures of efficiency of milk production in buffaloes

Published online by Cambridge University Press:  27 March 2009

S. S. Bhalaru  and
J. S. Dhillon
S. S. Bhalaru
Affiliation:
Department of Animal Science, Punjab Agricultural University, Ludhiana 141004, India
J. S. Dhillon
Affiliation:
Department of Animal Science, Punjab Agricultural University, Ludhiana 141004, India
Get access Rights & Permissions [Opens in a new window]

Summary

The least-squares means for first lactation milk yield, yield per 100 kg of body weight at first calving, yield per day of first lactation length, yield per day of first calving interval and yield per day of age at second calving were 1692 ± 28·2, 339·8 ± 7·30, 5·51 ± 0·97, 3·37 ± 0·81 and 1·07 ± 0·03 kg and the heritabilities of those traits were 0·192 ± 0·086, 0·078 ± 0·078, 0·287 ± 0·096, 0·192 ± 0·086 and 0·305 ± 0·097 respectively. The genetic correlations of first lactation milk yield with various measures of efficiency of milk production (except with yield per 100 kg of body weight) were positive and high (> 0·80). These results indicate that milk yield per day of age at second calving may be used for the selection of buffaloes.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 91 , Issue 1 , August 1978 , pp. 181 - 183
Copyright
Copyright © Cambridge University Press 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Abadov, A. A. (1972). Variation in external and production characters in buffaloes of different constitutional type. Trudy Azerbaidzhanskogo Nauchno-Issledovatel' skogo Instituta Zhivotnovodstva 13, 56–9. (Animal Breeding Abstract 42, 605.)Google Scholar
Amble, V. N., Gopalan, R., Malhotra, J. C. & Mehrotra, P. C. (1970). Some vital statistical and genetic parameters of Indian buffaloes at military dairy farms. Indian Journal of Animal Science 40, 377–88.Google Scholar
Bhalaru, S. S. (1977). Milk production versus overall economic merit as the selection criterion for buffalo improvement. M.Sc. thesis, Punjab Agricultural University, Ludhiana, India.Google Scholar
Harvey, W. R. (1968). Least-squares analysis of data with unequal sub-class numbers. United States Department of Agriculture. ARS, 20–8.Google Scholar
Robertson, A. (1959). The sampling variance of the genetic correlation coefficient. Biometrics 15, 469–85.CrossRefGoogle Scholar
Swiger, L. A., Harvey, W. R., Everson, D. O. & Gregory, K. E. (1964). The variance of intra-class correlation involving groups with one observation. Biometrics 20, 818–26.CrossRefGoogle Scholar