Zobrazeno 1 - 10
of 72
pro vyhledávání: '"D. H. Crews"'
Publikováno v:
Journal of Animal Science. 94:471-482
Genetic evaluation research designed to reduce the required days to a specified end point has received very little attention in pertinent scientific literature, given that its economic importance was first discussed in 1957. There are many production
Publikováno v:
Journal of Animal Science. 92:974-983
Feeding behavior traits including daily feeding duration (FD), daily feeding head down time (HD), average feeding duration per feeding event (FD_AVE), average feeding head down time per feeding event (HD_AVE), feeding frequency (FF), and meal eating
Publikováno v:
Journal of Animal Science. 91:4669-4678
In beef cattle, phenotypic data that are difficult and/or costly to measure, such as feed efficiency, and DNA marker genotypes are usually available on a small number of animals of different breeds or populations. To achieve a maximal accuracy of gen
Autor:
D. H. Crews, Zhiquan Wang, M. Vinsky, Changxi Li, John A. Basarab, Liuhong Chen, Erasmus Okine, F. Mao
Publikováno v:
Journal of Animal Science. 91:2067-2076
Feed efficiency is of particular importance to the beef industry, as feed costs represent the single largest variable cost in beef production systems. Selection for more efficient cattle will lead to reduction of feed related costs, but should not ha
Autor:
Gordon K. Murdoch, D. H. Crews, William J. Price, C. M. Welch, Rodney A. Hill, Jason K. Ahola, L. D. Keenan, Lauren C. Davis, Matthew E. Doumit, John B. Hall
Publikováno v:
Journal of Animal Science. 90:5107-5117
Energy expenditure is a physiological process that may be closely associated with residual feed intake (RFI). The maintenance energy (ME(M)) EPD was developed by the Red Angus Association of America (RAAA) and is used as an indicator of energy expend
Autor:
Gordon E Carstens, D. H. Crews
Publikováno v:
Feed Efficiency in the Beef Industry
Autor:
J. Mah, Jason R. Grant, Zhiqiang Wang, Stephen S. Moore, O. N. Durunna, Graham Plastow, J. D. Nkrumah, Fidalis D. N. Mujibi, D. H. Crews, John A. Basarab
Publikováno v:
Journal of Animal Science. 89:3362-3371
Because of the moderate heritability and the expense associated with collecting feed intake data, effective selection for residual feed intake would be enhanced if marker-assisted evaluation were used for accurate estimation of genetic merit. In this
Autor:
J. Mah, Zhiqiang Wang, Paul Stothard, Graham Plastow, O. N. Durunna, Fidalis D. N. Mujibi, D. H. Crews, John A. Basarab, J. D. Nkrumah, Stephen S. Moore
Publikováno v:
Journal of Animal Science. 89:3353-3361
The benefit of using genomic breeding values (GEBV) in predicting ADG, DMI, and residual feed intake for an admixed population was investigated. Phenotypic data consisting of individual daily feed intake measurements for 721 beef cattle steers tested
Publikováno v:
Journal of Animal Science. 89:3248-3261
The objectives of this study were to quantify the phenotypic variation in residual feed intake (RFI) in pregnant beef heifers offered a grass silage diet and to characterize their productivity. Seventy-three pregnant (mean gestation d 198, SD = 27 d)
Publikováno v:
Journal of Animal Science. 89:2068-2072
Selection criteria for yearling bulls commonly include indicators of fertility and carcass merit, such as scrotal circumference (SC) and intramuscular fat percentage (IMF). Genetic correlation estimates between ultrasound traits such as IMF and carca