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Genetic correlation during growth of twin cattle

Published online by Cambridge University Press:  02 September 2010

C. S. Taylor  and
Jean Craig
C. S. Taylor
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh 9
Jean Craig
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh 9
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Summary

All possible inter-age genetic correlations were calculated for each of twelve linear body measurements taken at 3-monthly intervals up to 2 years of age on 120 pairs of uniformly reared, liberally fed one-egg and two-egg twin dairy heifers. Genetic correlations between first and second-year mean size are also given. The influences of age, age interval, degree of maturity and body part on genetic correlation are examined.

Genetic correlation was in general very high. No significant difference was found between body parts in mean genetic correlation over the period studied. For a fixed age interval, genetic correlation increased with age; from a fixed age, it decreased with lengthening age-interval.

The main systematic trends found in the data were accounted for in terms of the amount of development taking place. Genetic correlation appeared to decrease exponentially with difference in degree of maturity, and a formula is given for calculating an approximate value for the expected genetic correlation between size at any two ages. Its range of applicability and its place in a general study of the genetic properties of a population of growth curves are discussed.

Type
Research Article
Information
Animal Production , Volume 7 , Issue 1 , January 1965 , pp. 83 - 102
Copyright
Copyright © British Society of Animal Science 1965

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References

REFERENCES

Batra, T. R., & Desai, R. N., 1962. A genetic study of weight in Sahiwal cattle. Indian J. Vet. Sci., 32: 198.Google Scholar
Blackwell, R. L., Knox, J. H., Shelby, C. E., & Clark, R. T., 1962. Genetic analysis of economic characteristics of young Hereford cattle. J. Anim. Sci., 21: 101.Google Scholar
Brinks, J. S., Clark, R. T., Kieffer, N. M., & Quesenberry, J. R., 1962. Genetic and environmental factors affecting performance traits of Hereford bulls. J. Anim. Sci., 21: 777.Google Scholar
Brody, S., 1945. Bioenergetics and Growth. Chap. 19. Reinhold Publishing Corporation, New York.Google Scholar
Dickerson, G. E., 1959. Techniques for research in quantitative animal genetics. Page 56 of Techniques and Procedures in Animal Production Research, Am. Soc. Anim. Prod. Monograph.Google Scholar
Donald, H. P., 1953. A study of variation in twin cattle. I. General description. J. Dairy Res., 20: 355.CrossRefGoogle Scholar
Hazel, L. N., Baker, M. L., & Reinmiller, C. F., 1943. Genetic and environmental correlations between the growth rate of pigs at different ages. J. Anim. Sci., 2: 118.Google Scholar
Johannson, I., 1961. Genetic Aspects of Dairy Cattle Breeding. Univ. of Illinois Press, Urbana.Google Scholar
Lasley, J. F., Day, B. N., & Comfort, J. E., 1961. Some genetic aspects of gestation length, and birth and weaning weights in Hereford cattle. J. Anim. Sci., 20: 737.Google Scholar
Lewis, D., 1954. Gene-environment interactions: a relationship between dominance, heterosis, phenotypic stability and variability. Heredity, 8: 333.CrossRefGoogle Scholar
Reeve, E. C. R., 1955. The variance of the genetic correlation coefficient. Biometrics, 11: 357.Google Scholar
Salvi, F., 1960. Analysis of the genetic variability in live-weight at the age of 6 months and 12 months in calves of the Chiana breed. Caryologia, 13: 523.Google Scholar
Shelby, C. E., Harvey, W. R., Clark, R. T., Quesenberry, J. R., & Woodward, R. R., 1963. Estimates of phenotypic and genetic parameters in 10 years of Miles City R.O.P. steer data. J. Anim. Set., 22: 346.Google Scholar
Swiger, L. A., 1961. Genetic and environmental influences on gain of beef cattle during various periods of life. J. Anim. Sci., 20: 183.Google Scholar
Swiger, L. A., Koch, R. M., Gregory, K. E., & Arthaud, V. H., 1961. Effect of length of feeding period on accuracy of selection for gain and feed consumption in beef cattle. J. Anim. Sci., 20: 802.Google Scholar
Taylor, St. C. S., 1962. Identical twins and developmental stability. Anim. Prod., 4: 144.Google Scholar
Taylor, St. C. S., 1963. Accuracy in measuring cattle with special reference to identical twins. Anim. Prod., 5: 105.Google Scholar