Evidence for Autoregressive Conditional Heteroskedastic errors in growth traits of beef cattle
نویسندگان
چکیده
منابع مشابه
Variational Bayesian Autoregressive Conditional Heteroskedastic Models
A variational Bayesian autoregressive conditional heteroskedastic (VB-ARCH) model is presented. The ARCH class of models is one of the most popular for economic time series modeling. It assumes that the variance of the time series is an autoregressive process. The variational Bayesian approach results in an approximation to the full posterior distribution over ARCH model parameters, and provide...
متن کاملGenome-Wide Association for Growth Traits in Canchim Beef Cattle
Studies are being conducted on the applicability of genomic data to improve the accuracy of the selection process in livestock, and genome-wide association studies (GWAS) provide valuable information to enhance the understanding on the genetics of complex traits. The aim of this study was to identify genomic regions and genes that play roles in birth weight (BW), weaning weight adjusted for 210...
متن کاملEvaluation of Crossbreeding Systems for Preweaning Traits in Beef Cattle
SUMMARY four-generation crossbreeding experiment with Hereford, Angus a from a tt1e were analyzed. Individual, maternal, and grand-maternal rthorn c: rotic effects on the composite trait of calf weight weaned per I e and h\~eeding and its component traits were evaluated. The parameter e."osed to then used to project performance at equ i 1 i bri urn under rotat i on teS ~ere The average of two-b...
متن کاملImplants For Growth Promotion In Beef Cattle
F beef cattle management practices are more cost effective or have a higher return on investment than properly used growth promoting implants. Growth promoting implants are pellets that are implanted under the skin of the ear of growing calves. These pellets release extremely low concentrations of various hormones, which improve average daily gain 7 to 17 percent and feed efficiency 4 to 12 per...
متن کاملRunning head : Maternal Variances for Growth of Beef Cattle Variance Components due to Direct and Maternal Effects for Growth Traits of Australian Beef Cattle
Variance components for birth, weaning, yearling and final weight in Australian Hereford, Angus and Zebu Cross cattle were estimated by Restricted Maximum Likelihood. Six different animal models were fitted for each trait and breed, ranging from a simple model with animals as the only random effect to the most comprehensive model allowing for both genetic and environmental maternal effects and ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Archives Animal Breeding
سال: 2007
ISSN: 2363-9822
DOI: 10.5194/aab-50-464-2007