Skip to main content Accessibility help
×
×
Home

Physiological attributes as possible selection criteria for milk production 3. Plasma hormone concentrations and metabolite and hormonal responses to changes in energy equilibrium

  • R. B. Land (a1), W. R. Carr (a1), I. C. Hart (a1) (a2), T. J. Osmond (a1), R. Thompson (a1) (a3) and N. Tilikaratne (a1)...

Abstract

Plasma hormone concentrations and metabolite responses to changes in energy equilibrium were measured in experiments designed to compare a) Hereford × Friesian with Friesian calves and b) Friesian calves sired by bulls with a high level of Improved Contemporary Comparison with those sired by bulls of a low level. The concentration of thyroxine and triiodothyronine tended to be greater in calves of higher dairy merit. The concentration of growth hormone was largely unrelated to dairy merit in the circumstances studied. The concentration of insulin was greater in Hereford × Friesian than in Friesian calves following feeding and following the injection of propionate. Responses to the injection of insulin and of growth hormone (as measured by changes in the plasma concentration of urea nitrogen, free fatty acids, glucose or the other hormone) were little affected by the level of Improved Contemporary Comparison of a calfs sire.

It was concluded that the thyroid system and the response of insulin to perturbation of energy balance may provide criteria of genetic merit for milk production which are neither age- nor sex-limited.

Copyright

References

Hide All
Cowie, A. T., Forsyth, I. A., and Hart, I. C., 1980 Hormonal Control of Lactation. Springer Verlag, Berlm.
Gutteridge, J. M. C. and Wright, E. B. 1968. A simple automated guaiacum 'glucose-oxidase method. J- med. Lab. Technol. 25: 385386.
Hart, I. C., Bines, J. A., Balch, C. C. and Cowie, A. T. 1975a. Hormone and metabolite differences between lactating beef and dairy cattle. Life Sci. 16: 12851292.
Hart, I. C., Bines, J. A., Morant, S. V. and Ridley, J. L. 1978. Endocrine control of energy metabolism in the cow: comparison of the levels of hormones (prolactin, growth hormone, insulin and thyroxine) and metabolites in the plasma of high- and low-yielding cattle at various stages of lactation. J. Endocr. 77: 333345.
Hart, I. C., Flux, D. S., Andrews, P. and Mcneilly, A. S. 1975b. Radioimmunoassay for ovine and caprine growth hormone: its application to the measurement of basal circulating levels of growth hormone in the goat. Hormone Metab. Res. 7: 3540.
Joakimsen, Ø., Steenberg, K., Lien, H. and Theodorsen, L. 1971. Genetic relationship between thyroxine degradation rate and fat-corrected milk yield in dairy cattle. Ada. Agric. scand. 21: 121124.
Marsh, W. H., Finoerhut, B. and Miller, H. 1965. Automated and manual direct methods for the determination of blood urea. Clin. Chem. 11: 624627.
Osmond, T. J., Carr, W. R., Hinks, C. J. M., Land, R. B. and Hill, W. G. 1981. Physiological attributes as possible selection criteria for milk production. 2. Plasma insulin, tri-iodothyronine and thyroxine in bulls. Anim. Prod. 32: 159163.
Patterson, D. S. P. 1963. Some observations on the estimation of non-esterified fatty acid concentrations in cow and sheep plasma. Res. vet. Sci. 4: 230237.
Quaas, R. L., Everett, R. W. and Mcclintock, C., 1979. Maternal grandsire model for dairy sire evaluation. J. Dairy Sci. 62: 16481654.
Seth, J., Rutherford, F. J. and Mckenzie, I. 1975. Solid-phase radioimmunoassay of thyroxine in untreated serum. Clin. Chem. 21: 14061413.
Seth, J., Toft, A. D. and Irvine, W. J. 1976. Simple solid phase radioimmunoassays for total triiodothyronine and thyroxine in serum and their clinical evaluation. Clinica chim. Ada. 68: 291301.
Tilikaratne, N., Alliston, J. C., Carr, W. R., Land, R. B. and Osmond, T. J. 1980. Physiological attributes as possible selection criteria for milk production. 1. Study of metabolites in Friesian calves of high and low genetic merit. Anim. Prod. 30: 327340.
Tilikaratne, N., Hill, W. G. and Land, R. B. 1981. Direct and correlated responses of mice to selection for the concentration of thyroxine in peripheral plasma. Genet. Res. 38: 157169.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Animal Science
  • ISSN: 1357-7298
  • EISSN: 1748-748X
  • URL: /core/journals/animal-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed