In the present study we placed germ discs (or fragments containing the deep central part of it) from unfertilized laid or extracted quail eggs on the deep side of the upper layer of isolated anti-sickle regions from unincubated chicken blastoderms. After culture in vitro of associations where the central deep part of the germ discs was in contact with the deep side of the upper layer (UL), we o...

An experiment was conducted to determine the differences in body weight (BW), feed intake (FI) and some egg production traits of two strains of layer chickens (Isa Brown and Nera Black) and correlate the relationships between the tested traits. The study commenced when the layers were 26 weeks old and a total of 200 (100 of each strain) were used. Sixty fresh eggs (30 from each strain) were col...

Several lines of evidence indicate that retinoids, derivates of vitamin A, affect reproductive function in birds, however, the mechanism of their action in the ovary is still unknown. Therefore, the present study was designed (i) to show whether in the domestic hen 9-cis retinoic acid (9-cis RA), one of the retinoids, influences steroid secretion in vitro by white and yellow chicken ovarian fol...

The diversity of pulsed-field profiles (PFPs) within non-typhoidal Salmonella subtypes influences epidemiological analyses of Salmonella outbreaks. Therefore, determining the PFP diversity of each Salmonella serovar is important when evaluating current circulating strains. This study examined the PFP diversity of three important public health Salmonella enterica subspecies enterica serovars, S....

The present study aimed to assess impact of selection based on microsatellite-genotypes at ADL0176 and the association MCW0044 located chromosome number-2 with growth layer economic traits in RIR chicken could reveal when sire component influenced progeny-birds different genotypes microsatellites. DD, EE CC/AD-genotypes microsatellite had corresponding higher BW28, BW40 EW40 progeny than other ...

Analysis of selective sweeps to pinpoint causative genomic regions involved in chicken domestication has revealed a strong selective sweep on chromosome 4 in layer chickens. The autoregulatory α-adrenergic receptor 2C (ADRA2C) gene is the closest to the selective sweep and was proposed as an important gene in the domestication of layer chickens. The ADRA2C promoter region was also hypermethylat...

An avian leukosis virus with a wide host range belonging to a new subgroup for chickens was isolated from meat-type chicken lines. The virus, of which HPRS-103 strain is the prototype, was of low oncogenicity in chickens but appeared to behave like an exogenous leukosis virus. Neutralizing antibodies to the virus were found in three of five meat-type chicken lines, but not in seven layer lines....

viii CHAPTER 1. GENERAL INTRODUCTION 1 Thesis Organization 2 CHAPTER 2. REVIEW OF LITERATURE 3 Corn Dried Distillers Grains with Solubles (DDGS) 3 Nutrient composition and value of DDGS 7 Wheat Bran 11 Nutrient composition and value of wheat bran 12 Classification of Fiber 15 Nutritional and Biological Effects of Dietary Fiber 16 Chicken Ceca Microbiology 19 Short Chain Fatty Acids in the Chick...

The purpose of this study was to investigate the effects different levels palm kernel meal (PKM) on diets layer KUB (Kampung Unggul Balibangtan) chicken. Local feed included in various PKM at 0% (T1), 10% (T2) and 20% (T3). This research conducted 2019 beginning period. One hundred forty-four 22-week-old birds were selected from a flock randomly allocated three treatments with 3 replicates diet...