Maternal effects are important in epigenetic determination of offspring phenotypes during all life stages. In the chicken (Gallus gallus domesticus), transgenerational transfer of egg yolk factors may set the stage for morphological and physiological phenotypic differences observed among breeds. To investigate the effect of breed-specific yolk composition on embryonic broiler and layer chicken ...

The direction of production for indigenous chicken breeds is currently unknown and this knowledge, combined with the development of chicken genome-wide association studies, led us to investigate differences in specific loci between broiler and layer chicken using bioinformatic methods. In addition, we analyzed the distribution of these seven identified loci in four Chinese indigenous chicken br...

This study sought to assess mitochondrial DNA (mtDNA) diversity and phylogeographic structure of chickens from five agro-ecological zones of Zimbabwe. Furthermore, chickens from Zimbabwe were compared with populations from other geographical regions (Malawi, Sudan and Germany) and other management systems (broiler and layer purebred lines). Finally, haplotypes of these animals were aligned to c...

Host resistance in Desi and commercial layer breeds was studied in this study. It was evaluated by measuring sensitivity of RBCs to LPAIV induced hemagglutination by using RBCs of two breeds and nine other avian species. Moreover, egg infectious dose 50 (EID50) along with mean death time (MDT) in embryonated eggs, intracerebral pathogenicity in dayold chicks, and intravenous pathogenicity, in f...

Results of examinations of the prenatal dynamic of development of skeletal musculature of chicken have been presented in this paper. Eggs of two types of chicken hybrids were incubated – broiler (Ross 308) and layer (Hy-Line Brown). Samples were taken in determined intervals. For the analyses of samples, light and scanning electron microscopy were used. Morphological characteristics of skeletal...

Single nucleotide polymorphisms (SNPs) in the genes for interleukin-4, -13 and interferon-gamma, and 21 additional SNPs which previously had been significantly associated with immune traits in the chicken, were genotyped in white and brown layer hens and analyzed for their association with helminth burden following natural infections. A nucleotide substitution located upstream of the promoter o...

Cerebellar hypoplasia and hydrocephalus were identified in day old broiler chickens showing nervous signs, impaired mobility, and diarrhea. At postmortem examination, brains of chickens were misshapen and cerebellums were smaller than normal. Microscopically, cerebellar folia were reduced in size and irregularly shaped, and the ventricles were widely distended. Affected cerebellums had focal ar...

Background: According to literature, there are differences among different species of animals in respect to absorption of D-xylose. OBJECTIVES: In two experiments, the differences that might exist in absorptive capacity of small intestine for D-xylose, in different types of chicken were tested. METHODS: In experiment one, 2 groups of nine adult layer type males (48 weeks) and females (58 weeks)...

Aim: Chicken infectious anemia virus (CIAV) causes immunosuppression leading to serious losses in chickens. Though CIAV has been reported in commercial chickens from many countries of the world, no information is available on CIAV from Grenada. This paper reports the result of a serological survey of CIAV in layer and broiler chickens in Grenada. Materials and Methods: A total of 226 serum samp...