Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-07T02:12:32.672Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimates of genetic and phenotypic parameters of litter traits from closed lines of pigs

Published online by Cambridge University Press:  02 September 2010

Y. Gu ,
C. S. Haley  and
R. Thompson
Y. Gu
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, Roslin, Midlothian EH25 9PS
C. S. Haley
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, Roslin, Midlothian EH25 9PS
R. Thompson
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, Roslin, Midlothian EH25 9PS
Get access

Abstract

Phenotypic and genetic analyses of the litter traits total number born, number born alive and total birth weight were conducted on data from two lines of pigs, line A, a synthetic largely of Landrace origin, and line B, derived from the Large White breed. The data were collected from closed herds of the Cotswold Pig Development Company Limited and comprised 1018 litters in line A and 863 litters in line B. Estimates of heritability and repeatability were low for all traits and consistent with other estimates in the literature, for number born alive being respectively, 0·07 (s.e. 0·04) and 0·15 (s.e. 0·04) in line A and 0·12 (s.e. 0·04) and 0·14 (s.e. 0·04) in line B. There was no evidence of an effect of the size of litter into which a female was born on her subsequent reproductive performance.

Type
Research Article
Information
Animal Production , Volume 49 , Issue 3 , December 1989 , pp. 477 - 482
Copyright
Copyright © British Society of Animal Science 1989

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

Avalos, E. 1985. Estimation of genetic parameters and responses in selection for litter size in pigs. Ph.D Thesis, University of Edinburgh.Google Scholar
Avalos, E. and Smith, C. 1987. Genetic improvement of litter size in pigs. Animal Production 44: 153–163.Google Scholar
Berreucos, J. M., Dillard, E. U. and Robison, O. W. 1970. Selection for low backfat thickness in swine. Journal of Animal Science 30: 844–848.CrossRefGoogle Scholar
Falconer, D. S. 1981. Introduction to Quantitative Genetics. 2nd ed. Longman, London.Google Scholar
Gu, Y, Haley, C. S. and Thompson, R. 1989. Estimates of genetic and phenotypic parameters of growth and carcass traits from closed lines of pigs on restricted feeding. Animal Production 49: 467–475.Google Scholar
Haley, C. S., Avalos, E. and Smith, C. 1988. Selection for litter size in the pig. Animal Breeding Abstracts 56: 317–332.Google Scholar
Henderson, C. R. 1984. Application of Linear Models in Animal Breeding. University of Guelph, Guelph, Canada.Google Scholar
Henderson, C. R. 1986. Estimation of variances in animal model and reduced animal model for single traits and single records. Journal of Dairy Science 69: 1394–1402.CrossRefGoogle Scholar
Hill, W. G. and Webb, A. J. 1982. Genetics of reproduction in the pig. In Control of Pig Reproduction (ed. Cole, D. J. A. and Foxcroft, G. R.), pp. 541–564. Butterworths, London.CrossRefGoogle Scholar
Johansson, K. and Kennedy, B. W. 1982. Estimation of genetic parameters of fertility traits in pigs. Proceedings of the 2nd World Congress on Genetics Applied to Livestock Production, Madrid, Vol. 7, pp. 503–508.Google Scholar
Johansson, K. and Kennedy, B. W. 1985. Estimation of genetic parameters for reproductive traits in pigs. Ada Agriculturae Scandinavica 35: 421–431.CrossRefGoogle Scholar
Legault, C. 1970. Étude statistique et génétique des performances d'élevage des truies de race Large White. II. Effect direct du verrat, héritabilité, répétabilité, corrélations. Annales de Génétique et de Sélection Animale 2: 209–227.CrossRefGoogle Scholar
Meyer, K. 1987. Restricted Maximum Likelihood (REML) Programs for the Analysis of Animal Breeding Data. Institute of Animal Genetics, Edinburgh University.Google Scholar
Morris, C. A. 1975. Genetic relationships between growth and reproduction in pigs. Ph.D. Thesis, University of Edinburgh.Google Scholar
Nelson, R. E. and Robison, O. W. 1976. Effects of postnatal maternal environment on reproduction of gilts. Journal of Animal Science 43: 71–77.CrossRefGoogle ScholarPubMed
Patterson, H. D. and Thompson, R. 1971. Recovery of inter-block information when block sizes are unequal. Biometrika 58: 545–554.CrossRefGoogle Scholar
Revelle, T. J. and Robison, O. W. 1973. An explanation for the low heritability of littersize in swine. Journal of Animal Science 37: 668–675.CrossRefGoogle Scholar
Rutledge, J. J. 1980. Fraternity size and swine reproduction. 1. Effect on fecundity of gilts. Journal of Animal Science 51: 868–870.CrossRefGoogle Scholar
Smith, S. P. and Graser, H. U. 1986. Estimating variance components in a class of mixed models by Restricted Maximum Likelihood. Journal of Dairy Science 69: 1156–1165.CrossRefGoogle Scholar
Strang, G. S. 1970. Litter productivity in Large White pigs. 1. The relative importance of some sources of variation. Animal Production 12: 225–233.Google Scholar
Strang, G. S. and King, J. W. B. 1970. Litter productivity in Large White pigs. 2. Heritability and repeatability estimates. Animal Production 12: 235–243.Google Scholar
Van Der Heyde, H. and Lihvens, R. 1984. Effect of early weaning, fractionated early weaning and litter size on ulterior reproductive performance of piglets. European Association for Animal Production, p. 5.16, the Hague, the Netherlands.Google Scholar
Van Der Steen, H. A. M. 1985. Maternal influence mediated by litter size during the suckling period on reproduction traits in pigs. Livestock Production Science 13: 147–158.CrossRefGoogle Scholar
Vangen, O. 1980. Studies on a two trait selection experiment in pigs. V. Correlated responses in reproductive performance. Ada Agriculturae Scandinavica 30: 309–319.CrossRefGoogle Scholar