Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Optimum postweaning test for measurement of growth rate, feed intake, and feed efficiency in British breed cattle|
|Citation:||Journal of Animal Science, 1997; 75(8):2024-2032|
|Publisher:||AMER SOC ANIMAL SCIENCE|
|Abstract:||The optimum duration of test for measurement of growth rate, feed intake, feed conversion, and residual feed intake was examined using postweaning feed intake and weight data from 760 Angus, Hereford, Polled Hereford, and Shorthorn heifer and Angus bull progeny from 78 sires. Variance components, heritability, phenotypic and genetic correlations, and the efficiency of selection using shortened tests compared with a 199-d test were used as criteria to assess the optimum test length. The results indicated that a 35-d test was sufficient for measurement of feed intake, whereas a 70-d test was required to measure growth rate, feed conversion, and residual feed intake without compromising the accuracy of measurement. When a 70-d test is used to measure growth rate, feed conversion, and residual feed intake there is minimal loss in accuracy when weights are collected every 2 wk instead of weekly, but a further increase in the interval between weights to 5 wk caused a decline in the accuracy of the test. Therefore a 70-d test with cattle weighed every 2 wk seems to be optimal for measuring these traits in British breed cattle.|
|Keywords:||Animals; Cattle; Body Weight; Weight Gain; Breeding; Environment; Eating; Phenotype; Time Factors; Animal Feed; Female; Male|
|Appears in Collections:||Agriculture, Food and Wine publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.