(treatment main effect) during phase I, II and the overall experimental period. However, there were numerical increases in ADG, ADFI and feed efficiency with the additions of the VTMM premix and B-safety pak. Increases in ADG and ADFI were observed as the VTMM premix was added at 100% of the NRC 1998 requirements for 5 to 45 lb pigs (ADG: NC = 0.744 lb/d, trt 1 = 0.770 lb/d; ADFI: NC = 1.152 lb...

It is essential to quantify the potential of tropical grasslands to allow significant feed efficiency for grazing livestock in controlled conditions such as at pasture. We conducted a quantitative analysis of published studies reporting the experimental results of average daily gains (ADG) and diet characteristics obtained specifically under grazing conditions (17 publications and 41 experiment...

(co) variance components and genetic parameters for growth traits in arman sheep were estimated, using data collected during an 11-year period (1999-2010), by applying the restricted maximum likelihood (reml) procedure under univariate and bivariate animal models. the studied traits were body weight of lamb at birth (bw), body weight at 3 months of age as weaning weight (ww), body weight at 6 m...

OBJECTIVE Average daily gain (ADG) is an important target trait of pig breeding programs. We aimed to identify single nucleotide polymorphisms (SNPs) and genomic regions that are associated with ADG in the Duroc pig population. METHODS We performed a genome-wide association study involving 390 Duroc boars and by using the PorcineSNP60K Beadchip and two linear models. RESULTS After quality c...

the nutrient requirements and performance guidelines of management guides are based upon many actual flock results obtained under good environmental and management conditions. in practice and under the prevalent poultry industry situation, through these nutrient levels, iranian farmers cannot attain the performance reported in management guidelines. an estimation of the model of broiler breeder...

We conducted a two-way selection experiment in a composite rabbit population to investigate the responses to selection for postweaning ADG and feed conversion (FC). Two generations of crossing, followed by four generations of random pair matings, preceded three generations of selection. Selection was practiced within four lines: high-feed conversion (HFC), low-feed conversion (LFC), high gain (...

Insulin-like growth factor 1 receptor (IGF-1R) is a main receptor of IGFs family which plays a critical role in the postnatal growth and skeletal growth in many species. However, there are few reports of IGF-1R gene structure and its effects on growth traits in sheep. The objectives of this study were detection of IGF-1R polymorphisms and assessment of their associations with ...

Seven bermudagrass hays were fed to growing steers to determine the relationship between average daily gain (ADO) and Quality Index (QI). Voluntary intake and digestibility were measured with cattle and sheep, respectively. The range in ADG was from -.3 to 1.7 lb/d, and QI ranged from .9 to1.9. The correlation between ADG and QI was quite high (r = .92). For growing steers, QI is a valid expres...