Several studies were conducted on evaluation of heterosis, maternal and reciprocal-effects for different chicken breeds. However, there is a limited information the reciprocal-effect crossbreed Fayoumi White Leghorn. Therefore; this study was designed to evaluate reciprocal effects traits Leghorn from day-old age at first egg. A total six hundred chicks selected,150 each genotype evaluated simu...

This paper discussed how to optimize production traits for two layer breeds in Egypt. The first breed is indigenous Fayoumi and the second exotic Leghorn. Both breeds have their different performances and each breed was preferred over the other for some particular traits. By crossing the two breeds, the crossbreds could benefit from the strengths of the purebreds for particular traits. The econ...

OBJECTIVE Despite an increasing number of investigations into the pathophysiology of necrotic enteritis (NE) disease, etiology of NE-associated diseases, and gene expression profiling of NE-affected tissues, the microRNA (miRNA) profiles of NE-affected poultry have been poorly studied. The aim of this study was to induce NE disease in the genetically disparate Fayoumi chicken lines, and to perf...

This study was carried out to evaluate the effect of light color temperature on reproductive performance and expression pattern GnRH-1 FSH β genes in layers. At lay, 165 Fayoumi healthy pullets were separated into well ventilated, environmentally controlled rooms. Birds allocated three groups with 55 birds each (5 males 50 females) till 3 months after laying, representing base generation (F0). ...

A genome scan was used to detect chromosomal regions and QTL that control quantitative traits of economic importance in chickens. Two unique F(2) crosses generated from a commercial broiler male line and 2 genetically distinct inbred lines (Leghorn and Fayoumi) were used to identify QTL affecting BW and daily average gain traits in chickens. Body weight at 2, 4, 6, and 8 wk was measured in the ...

Two unique chicken F(2) populations generated from a broiler breeder male line and 2 genetically distinct inbred (>99%) chicken lines (Leghorn and Fayoumi) were used for whole genome QTL analysis. Twelve phenotypic skeletal integrity traits (6 absolute and 6 relative traits) were measured or calculated, including bone mineral content, bone mineral density, tibia length, shank length, shank weig...

This study aimed to assess the variation in growth patterns of the warm region breeds in response to the intermittent prolonged heat stress conditions. Three warm region breeds (Fayoumi, Sinai Bedouin and White Baladi) and a commercial broiler strain were brooded for 8 wks in two thermal (heating and nonheating) treatments. The target ambient temperature in the heating treatment was 35°C from h...