Multiple trait model combining random regressions for daily feed intake with single measured performance traits of growing pigs
نویسندگان
چکیده
منابع مشابه
Detecting 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 کاملOptimum duration of performance tests for evaluating growing pigs for growth and feed efficiency traits.
The optimum duration of test for the measurement of ADG, ADFI, feed:gain ratio [which is the reciprocal of the efficiency of gain (G:F) and therefore increases as the efficiency of gain decrease and vice versa], and residual feed intake was examined in growing pigs. Data from 144 hybrid (mainly Large White x Landrace) pigs involved in a longitudinal (n = 54) and serial slaughter (n = 90) experi...
متن کاملMultiple 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 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 کاملNet Feed Intake of Growing Bulls and Relationships with Performance, Fertility and Ultrasound Composition Traits
Net feed intake (NFI) is a moderately heritable feed efficiency trait that has been shown to be genetically independent of ADG and BW in beef cattle. Objectives of this study were to characterize NFI in growing bulls, and to examine phenotypic correlations between NFI and performance, body composition, and fertility traits. Net feed intake was positively correlated phenotypically with feed conv...
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 2002
ISSN: 1297-9686
DOI: 10.1186/1297-9686-34-1-61