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Direct and correlated responses to selection for egg production under 23 h light-dark cycle in the domestic fowl



Direct and correlated responses to selection for egg production under 23 h light-dark cycle in the domestic fowl



Proceedings of the 3rd AAAP Animal Science Congress, May 6-10, 1985 Volume 1: 263-265



Selection was carried out for egg production under 23- or 24-h light-dark cycles using 600 White Leghorn hens. On the 23-h cycle, there was 15-h light:8-h darkness (15L:8D) after 17 wk of age. On the 24-h cycle there was 15L:9D. The selection criterion was rate of lay from 181 to 300 days of age.

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Accession: 001336832

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