Multiple trait model combining random regressions for daily feed intake with single measured performance traits of�growing pigs
نویسندگان
چکیده
منابع مشابه
Multiple Trait Random Regression Test Day Model for Production Traits
Research on test day (TD) models began in Canada in 1991. At that time fixed regressions (within age and season of calving) were used to account for the shape of the lactation curve of dairy cows, but the animal effect was used only to account for differences in height of these curves (Ptak and Schaeffer, 1993). Fixed regression TD model was applied to Canadian dairy goat data (Schaeffer and Su...
متن کاملDetecting QTL for feed intake traits and other performance traits in growing pigs in a Piétrain-Large White backcross.
Knowing the large difference in daily feed intake (DFI) between Large White (LW) and Piétrain (PI) growing pigs, a backcross (BC) population has been set up to map QTL that could be used in marker assisted selection strategies. LW × PI boars were mated with sows from two LW lines to produce 16 sire families. A total of 717 BC progeny were fed ad libitum from 30 to 108 kg BW using single-place e...
متن کاملEffects of Echinacea on Daily Feed Intake of Nursery Pigs with and without PRRS
A demonstration was conducted with nursery pigs by using diets supplemented with Mecadox, no supplementation, and Echinacea. The study lasted for 4 weeks. The nursery pigs were weighed and the feed intake was measured. The results suggested that Echinacea does not suppress feed intake or the weight gain in nursery pigs compared with the no supplement or Mecadox diets. Half of the pigs were inoc...
متن کاملGenetics of residual feed intake in growing pigs: Relationships with production traits, and nitrogen and phosphorus excretion traits.
Residual feed intake (RFI) is defined as the difference between the observed ADFI and the ADFI predicted from production and maintenance requirements. The objectives of this study were to evaluate RFI as a selection criterion to improve feed efficiency and its potential to reduce N and P excretion in 4 pig breeds. Data were collected between 2000 and 2009 in French central test stations for 2 d...
متن کاملGenetic parameters for residual feed intake in growing pigs, with emphasis on genetic relationships with carcass and meat quality traits.
Data were collected over the first 4 generations of a divergent selection experiment for residual feed intake of Large White pigs having ad libitum access to feed. This data set was used to obtain estimates of heritability for residual feed intake and genetic correlations (r(a)) between this trait and growth, carcass, and meat quality traits. Individual feed intake of group-housed animals was m...
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 2002
ISSN: 0999-193X,1297-9686
DOI: 10.1051/gse:2001004