However, it is difficult to estimate mature weight from measurements during the bull test and more research is required to resolve this difficulty. In the second approach, feed intake was adjusted for initial weight, gain on test and fatness at end of test. The approach of using adjusted feed intake appears promising, but further research is needed to combine this measurement with other traits such as growth rate and possible market weight. Feed conversion measurements are affected by initial weight and composition of gain and by time period of measurement. Simple feed gain on the bull test program is not a good measure of true efficiency.
Further research is required to determine the best criterion.
A possible solution at present is to choose sires within an acceptable range of predicted market weight and then to choose those that reach that point most quickly with the least feed required. This information is provided as a public service, but we cannot guarantee that the information is current or accurate. Readers should verify the information before acting on it.