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Reduced heat tolerance in fast-growing broilers

Published online by Cambridge University Press:  27 February 2018

A. Cahaner  and
N. Deeb
A. Cahaner
Affiliation:
The Hebrew University of Jerusalem, P. O. Box 12, Rehovot 76100, Israel
N. Deeb
Affiliation:
The Hebrew University of Jerusalem, P. O. Box 12, Rehovot 76100, Israel
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Extract

Broiler breeders conduct their breeding programs only in optimal environments, claiming that because farmers are instructed to provide the broilers with optimal management, genotype by environment interactions (GxE) are not important for the broiler industry. However, with the rapid development of the poultry industry worldwide, high-performance broiler stocks are now being imported to developing countries where environmental control, mainly the mitigation of hot climates, is not feasible. Moreover, results from several studies suggest that due to the increase in genetic potential for rapid growth rate, resulting from successful breeding programs, broilers are becoming more sensitive to rather small environmental deviations from optimal conditions (Leenstra and Cahaner, 1991; Cahaner and Leenstra, 1992; Cahaner et al., 1993; Settar et al., 1999; Yunis et al, 1999). Hence, also in developed countries, many broilers will be, or are already being reared under suboptimal hot environments.

Type
Poster Presentations
Information
BSAP Occasional Publication , Volume 27: The challenge of genetic change in animal production , 2000 , pp. 85 - 86
Copyright
Copyright © British Society of Animal Science 2000

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References

Cahaner, A., and Leenstra, F., 1992. Effects of high temperature on growth and efficiency of male and female broilers from lines selected for high weight gain, favorable feed conversion, and high or low fat content. Poult. Sci. 71, 1237–1250.CrossRefGoogle ScholarPubMed
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Yunis, R., and Cahaner, A., 1999. The effects of naked-neck (Na) and frizzle (F) genes on growth and meat yield of broilers, and their interactions with ambient temperatures and potential growth rate. Poult. Sci. 78 (in press).CrossRefGoogle Scholar