Article
Phenotypic study on total and partial lifetime traits for dairy ewes.
The Journal of dairy research - 1 Feb 2006
El-Saied Usama M, de la Fuente L Fernando, Primitivo Fermín San
Abstract excerpt
A data file on 36,396 lactations was used to determine the strength of the phenotypic relationship between productive, reproductive and lifespan traits for 7935 Spanish Churra ewes. These ewes first lambed between 1989 and 1997 and belonged to 23 flocks. The study took into account four lifespan traits (lifetime, productive life, useful life and lifetime score), three productive traits (total milk yield produced...
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