Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-26T21:15:42.677Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimates of genetic and phenotypic parameters for growth traits of D'Man lambs

Published online by Cambridge University Press:  02 September 2010

I. Boujenane  and
M. Kerfal
I. Boujenane
Affiliation:
Department of Animal Production, Hassan II Agronomy and Veterinary Institute, BP 6202 Rabat-Instituts, Morocco
M. Kerfal
Affiliation:
National Institute of Agricultural Research, Errachidia, Morocco
Get access

Abstract

The heritability of growth traits from birth to 6 months of age and the genetic and phenotypic correlations among them were determined from paternal half-sib analyses of 1689 records of D'man lambs. Heritability estimates were 0·34 (s.e. 0·08), 0·23 (s.e. 0·06), 0·52 (s.e. 0·10) and 0·43 (s.e. 0·09) for weights at birth, 30 days, 90 days and 180 days, respectively. Heritabilities for average daily gains from birth to 30 days and from 30 to 90 days were estimated to be 0·12 (s.e. 0·05) and 0·56 (s.e. 0·11), respectively. Genetic and phenotypic correlations among growth traits were all positive and of high magnitude. The former estimates varied from 0·66 to 0·98, the latter estimates ranged from 0·23 to 0·92. Selection for high weight at 90 days would be expected to have large effect on other growth traits as a result of their large positive genetic correlations.

Keywords

genetic correlationsgrowth traitsheritabilitylambsphenotypic correlation
Type
Research Article
Information
Animal Production , Volume 51 , Issue 1 , August 1990 , pp. 173 - 178
Copyright
Copyright © British Society of Animal Science 1990

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

REFERENCES

Acharya, R. M. and Malik, R. C. 1971. Genetic and phenotypic parameters for pre- and post-weaning body weights in Nali and Lohi, and their crosses with Nellore and Mandya. Indian Journal of Animal Sciences 41: 1126–1129.Google Scholar
Bonaiti, B., Flamant, J. C., Prud'hon, M., Berny, F. and Desvignes, A. 1976. Estimation des paramètres génétiques de la vitesse de croissance et du poids des agneaux avant le sevrage en race Mérinos d'Aries. Annales de Génétique et de Séléction Animale 8: 357–365.Google Scholar
Boujenane, I. and Bradford, G. E. 1990. Genetic effects on ewe productivity of crossing Sardi and D'man breeds of sheep. Journal of Animal Science In press.Google Scholar
Dzakuma, J. M., Nielsen, M. K. and Doane, T. H. 1978. Genetic and phenotypic parameter estimates for growth and wool traits in Hampshire sheep. Journal of Animal Science 47: 1014–1021.CrossRefGoogle Scholar
Ercanbrack, S. K. and Price, D. A. 1972. Selecting for weight and rate of gain in noninbred lambs. Journal of Animal Science 34: 713–725.Google Scholar
Gjedrem, T. 1967. Phenotypic and genetic parameters for weights of lambs at five ages. Ada Agriculturae Scandinavica 17: 199–216.CrossRefGoogle Scholar
Harvey, W. R. 1987. User's Guide for LSMLMW. Ohio State University Press, Columbus.Google Scholar
Martin, T. G., Sales, D. I., Smith, C. and Nicholson, D. 1980. Phenotypic and genetic parameters for lamb weights in a synthetic line of sheep. Animal Production 30: 261–269.Google Scholar
Mavrogenis, A. P., Louca, A. and Robison, O. W. 1980. Estimates of genetic parameters for pre-weaning and post-weaning growth traits of Chios lambs. Animal Production 30: 271–276.Google Scholar
Morrison, R. L., Vogt, D. W., Ellersieck, M. R. and Ross, C. V. 1984. Sheep: heritability estimates of birth weight and average daily weight gain to sixty days. International Goat and Sheep Research 2: 231–237.Google Scholar
Olson, L. W., Dickerson, G. E. and Glimp, H. A. 1976. Selection criteria for intensive market lamb production: growth traits. Journal of Animal Science 43: 78–89.CrossRefGoogle Scholar
Osborne, R. 1957. The use of sire and dam family averages in increasing the efficiency of selective breeding under a hierarchal mating system. Heredity 11: 93–116.CrossRefGoogle Scholar
Osman, A. H. and Bradford, G. E. 1965. Effects of environment on phenotypic and genetic variation in sheep. Journal of Animal Science 24: 766–774.CrossRefGoogle ScholarPubMed
Searle, S. R. 1961. Phenotypic, genetic and environmental correlations. Biometrics 17: 474–480.Google Scholar
Shrestha, J. N. B., Vesely, J. A., Chesnais, J. P. and Cuthbertson, D. 1986. Genetic and phenotypic parameters for daily gain and body weights in Dorset lambs. Canadian Journal of Animal Science 66: 289–292.CrossRefGoogle Scholar
Vogt, D. W., Carter, R. C. and McClure, W. H. 1967. Genetic and phenotypic parameter estimates involving economically important traits in sheep. Journal of Animal Science 26: 1232–1238.CrossRefGoogle ScholarPubMed