It is currently accepted that stem cells of the definitive blood cell lines originate from the yolk-sac blood islands. Experiments were devised to examine the validity of this theory in the avian embryo. These involved grafting two-day-old quail embryos on to chick yolk-sacs of comparable developmental stages, i.e. before or shortly after the establishment of vascularization. The conclusions of...

the goal of this experiment was to investigating of effects of different levels of nano chromium (n-cr) in diet on egg quality and blood chromium content of japanese quail. two hundred and forty laying japanese quail (45 day old) were randomly distributed to 20 experimental unit with 12 birds in cage pens of 40 × 80 cm. experimental treatments include: 1) control national research council (nrc,...

Parthenogenesis, embryonic development of an unfertilized egg, was studied for many years in turkeys. In fact, as many as 49% of unfertilized Beltsville Small White turkey eggs develop embryos. However, no research exists on parthenogenesis in quail. The Chinese painted quail is a close relative of the more common Japanese quail and, unlike turkeys or chickens, the small Chinese painted quail r...

An experiment was conducted to study the effects of soybean, linseed and sunflower oil (various sources of fatty acids) with and without L-carnitine supplements (0 and 50 mg kg-1) on performance, blood biochemical parameters and carcass traits of Japanese quail. One hundred and ninety-two of 7-day old female Japanese quail were randomly assigned to 6 dietary treatments with 4 replicates and fed...

Quail is an alternative source of protein for humans. These birds can be affected by common bacterial infections. Bacterial contamination of egg is the most common cause of mortality in Japanese quail chicks. In order to study the role of some members of Enterobacteriaceae responsible for early mortality in Japanese quail chicks, 100 dead or moribund quail chicks were obtained from 10 different...

During investigations on the regulation of the Pax-6 gene, we characterized a cDNA from quail neuroretina showing a 5' untranslated region distinct from that previously described and initiated from an internal promoter. Using RNase protection and primer extension mapping, we localized this second quail Pax-6 promoter, termed P1. As reported for the already described P0 promoter, P1 was also tra...

This study was conducted to investigate the effect of feeding method (wet and dry) on the performance of meat quail chicks. This experiment was carried out with 160 one days old quail chicks in completely randomized design, 2 treatments included 4 replicates (20 quail chicks in each replicate) and conducted for a 35 day period. Measured traits, were included performance parameters, carcass char...

The development of the ciliary ganglion with reference to the site and cells of origin have been investigated by the method of quail-to-chick transplantation of embryonic fore-, mid-and hindbrain regions, and by the method of transplantation of cranial neural crest from specific brain levels. In chimaerical embryos, quail cells originating from the graft end up in the ciliary ganglion, only whe...

Effect of Different Levels Phytase Enzyme and Vitamin D3 on Production Performance Egg Quality Japanese Laying Quail