The FCR for each individual was estimated based on the ratio between unit weight gain and feed consumption. Genetic parameters estimation We constructed the multi-trait animal model: [Math Processing Error]Y=Xb+Za+e (5) to obtain estimates of the phenotypic and genetic (co)variance and ...
4 Feed efficiency can be measured using the feed conversion ratio (FCR), which is a composite trait defined as feed intake per unit of body weight gain (BWG) during a specified period of time.5 Genetic selection of livestock based on low FCR can improve efficiency of energy utilization ...
Jauralde, I., S. Martinez‑Llorens, A. Tomas, R. Ballestrazzi and M. Jover, 2013. A proposal for modelling the thermal‑unit growth coefficient and feed conversion ratio as functions of feeding rate for gilt...
Between weighing periods, biomass increase was estimated daily, assuming a feed conversion ratio (FCR) of 152. At the end of the feeding trial, survival, specific growth rate (SGR) and percent weight gain for each diet were determined. Equations are defined below: $${\rm{SGR}}=(\mathrm{...
Through this paper, we proposed to establish the production performances of breeder PIC lines exploited within a top unit in Moldova in swine husbandry -S.C. SUINPROD S.A. ROMAN. In order to assess the production performances, there have been studied individuals resulted from crossings between ...
Feed conversion ratio ( FCR ) in grow-finishing pigs is one of the most important determinants of pig farm profitability and production efficiency. In its simplest form, FCR represents the amount of feed used per unit weight gain of the pig. Yet, this approach entails various limitations hamper...
Fortunately, there is a growing tendency to refer to the second ratio (namely, feed per unit weight of gain) as "feed conversion." The writers urge that the first ratio (namely, gain per unit weight of feed) be referred to as "efficiency of feed utilization" or as . . . 展开 关键...
Genetic parameters of growth, feed intake, feed conversion and carcass composition of dual-purpose bulls in performance testing. Genetic parameters for growth, total energy intake, feed conversion ratio, average daily energy intake and carcass composition were estimated in an experim... J Jensen,Mao...
Feed efficiency is an important economic trait and reduces the production costs per unit of animal product. Up to now, few studies have conducted transcriptome profiling of liver tissue in feed efficiency-divergent chickens (Ross vs native breeds). Also, molecular mechanisms contributing to differences...
An animal with a low feed conversion ratio and low residual feed intake consumes less feed per unit of body weight than expected and is considered efficient, whereas an animal with a high feed conversion ratio and residual feed intake consumes more feed than expected and is considered inefficient...