Research Article

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02/13/2014
Growth hormone receptor; Heat stress; Insulin-like growth factor I; Methionine; Uncoupling protein

This study evaluated the expression of insulin-like growth factor I (IGF-I), growth hormone receptor (GHR), and uncoupling protein (UCP) mRNA in muscle and liver of quails that were in thermal comfort or exposed to heat stress and that were fed diets with or without methionine supplementation. Meat quails were fed a diet that either met the nutritional demands for methionine (MS) or did ... more

A.P. Del Vesco; E. Gasparino; V. Zancanela; D.O. Grieser; S.E.F. Guimarães; C.S. Nascimento; D.M. Voltolini; J. Constantin; F.S. Gasparin
05/11/2007
Amino acids; Cassava; Interspecific hybrids; Lysine; Methionine; Protein content

Cassava roots have a low-protein content (0.7-2%). Amino acids such as lysine and methionine are also low, and some research reports have indicated the absence of methionine. The amino acid profiles of a common cassava cultivar and an interspecific hybrid, namely ICB 300, were determined using the computerized amino acid analyzer Hitachi L-8500. The interspecific hybrid has 10 times ... more

N.M.A. Nassar; M.V. Sousa
08/26/2008
Animal breeding; broiler; Genetic trend; meat quality; poultry quality

The present research was conducted to estimate the genetic trends for meat quality traits in a male broiler line. The traits analyzed were initial pH, pH at 6 h after slaughter, final pH, initial range of falling pH, final range of falling pH, lightness, redness, yellowness, weep loss, drip loss, shrink loss, and shear force. The number of observations varied between 618 and 2125 for each ... more

G.B. Mourão; L.G. Gaya; J.B.S. Ferraz; E.C. Mattos; A.M.M.A. Costa; M. Filho; O.C.Cunha Neto; A.M. Felício; J.P. Eler
04/17/2014
Ammonia; Antioxidative capacity; broiler; meat quality; Relative humidity

To investigate the effect of humidity and ammonia on the antioxidative capacities and meat qualities of broilers, 192 broilers were divided into 2 groups: high (H, 70 ppm) and low (L, 30 ppm) ammonia concentration. These groups were divided into 30% (Treatment humidity, T) and 60% (Control humidity, C) humidity, giving 4 treatments: C+L, C+H, T+L, and T+H. Blood and muscle antioxidative ... more

F.X. Wei; X.F. Hu; R.N. Sa; F.Z. Liu; S.Y. Li; Q.Y. Sun
04/10/2015
Ammonia concentration; broiler; Immune response; Relative humidity

To investigate the effect of ammonia (NH3) and humidity on the immune response of broilers, broilers were exposed to 30 or 70 mg/kg atmospheric NH3 for 21 days. Additionally, birds were exposed to 35, 60, and 85% relative humidity (RH). The relative weights of lymphoid organs, serum total protein, serum globulin, serum albumin, serum lysozyme, proliferation index of ... more

F.X. Wei; X.F. Hu; B. Xu; M.H. Zhang; S.Y. Li; Q.Y. Sun; P. Lin
09/09/2015
broiler; Candidate gene; Polymorphism; Production trait; QTL

Genetic selection for production traits has resulted in a rapid improvement in animal performance and development. Previous studies have mapped quantitative trait loci for body weight at 35 and 41 days, and drum and thigh yield, onto chicken chromosome 4. We investigated this region for single nucleotide polymorphisms and their associations with important economic traits. Three positional ... more

F. Pértille; R. Zanella; A.M. Felício; M.C. Ledur; J.O. Peixoto; L.L. Coutinho
08/14/2015
broiler; Genetic correlation; Gibbs sampling; Heritability; Liver fat trait; Restricted maximum likelihood

Intensive selection of broilers for improved growth rate is known to exert a negative effect on broiler health, such as an increase in body fat (and its related diseases). Excessive fat deposition in the liver can cause fatty liver hemorrhagic syndrome (FLHS); in addition, traits associated with liver fat have also been associated with FLHS. This study explored the genetic relationships ... more

M.J. Liang; Z.P. Wang; L. Xu; L. Leng; S.Z. Wang; P. Luan; Z.P. Cao; Y.M. Li; H. Li
2016 Dec 02
Animals; Avian Proteins; Chickens; Female; Genetic association studies; Genotype; Insulin-like growth factor I; Phenotype; Polymorphism, Single-Stranded Conformational; Quantitative trait loci; Reproduction; Selection, Genetic

The insulin-like growth factor, IGF-I, plays an important role in the development of growth and reproductive traits. Single-strand conformation polymorphism analysis was used to detect and analyze polymorphisms and expression profiles of the IGF-I gene and its association with growth and reproductive traits of Jinghai yellow chickens. A point mutation g.295T>C was detected in the IGF-I gene ... more

M.A. Abdalhag; T. Li; L. Duan; T. Zhang; G. Zhang; J. Wang; Y. Wang
2017 Mar 16
Alendronate; Animals; Bone Density Conservation Agents; Bone morphogenetic protein 2; Cytokines; Disease Models, Animal; Dyskinesias; Female; Fibroblast Growth Factor 2; Humans; Insulin-like growth factor I; Osteoporosis; Ovariectomy; Rabbits; Treatment outcome; Up-Regulation

Alendronate regulates the activity of osteoclasts and healing of osteoporosis. This study investigated the effect of alendronate on bone healing and changes in the levels of cytokines. Bilateral ovaries of 10 adult female rabbits were removed surgically in aseptic condition to establish the animal model of osteoporosis. Five rabbits in group A were treated with alendronate (1.15 mg·kg·week) ... more

C.T. Liu; X.J. Yuan; G.C. Gao