Journal article

A model of individual variation in the food conversion efficiency and other growth parameters of grazing beef cattle in the tropics

S Saithanoo, ME Goddard

Australian Journal of Agricultural Research | Published : 1988

Abstract

Methods to genetically improve gross food efficiency (GFE) in cattle usually rely on a high genetic correlation between GFE and growth rate. Estimating this genetic correlation for cattle grazing tropical pastures is extremely difficult, so a model of individual variation in growth has been developed based on component traits which are known to affect growth rate. The model assumes that there is individual variation in mature size, maintenance requirement, intake to maintenance ratio, and susceptibility to heat stress and to tick and worm infestation. Nutritional level is assumed to interact with maintenance requirement, so that under good nutrition a high level of maintenance requirement ma..

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