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A note on the variation and heritability of twinning in British Friesian cattle

Published online by Cambridge University Press:  02 September 2010

J. C. Bowman ,
I. J. M. Frood  and
P. D. P. Wood
J. C. Bowman
Affiliation:
Department of Agriculture, The University, Reading, Berkshire
I. J. M. Frood
Affiliation:
Department of Agriculture, The University, Reading, Berkshire
P. D. P. Wood
Affiliation:
Milk Marketing Board, Thames Ditton, Surrey
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Summary

Records of calving, excluding first calving, on 2862 cows, the daughters of 63 bulls used in AI were analysed to estimate the incidence and variation of twinning between bull progeny groups. The mean incidence of twinning was 2·8% and though the incidence increased with later parities the effect of parity was not significant. The incidence for bull progeny groups ranged from 0 to 8·8%. The intraclass correlation between parities for cows within bulls was 0·064±0·018 and a sire half sib group estimate of heritability for twinning, based on a single calving, was 0·43±0·012.

Type
Research Article
Information
Animal Production , Volume 12 , Issue 3 , August 1970 , pp. 531 - 533
Copyright
Copyright © British Society of Animal Science 1970

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References

REFERENCES

Bowman, J. C. and Hendy, C. R. C. 1970. The incidence, repeatability and effect on dam performance of twinning in British Friesian cattle. Anim. Prod. 12: 55–62.Google Scholar
Hendy, C. R. C. and Bowman, J. C. 1970. Twinning in cattle. A review. Anim. Breed. Abstr. 38: 22–37.Google Scholar
Maijala, K. 1964. Fertility as a breeding problem in artificially bred populations of dairy cattle. 1. Registration and heritability of female fertility. Ann. Agric. Fenn. 3, Supplementum 1. 94 pp.Google Scholar