two breeds of chickens were used to develop reference family and detect qtls affecting egg quality traits: cocks of a native polish breed green-legged partidgenous (glp) and hens of rhode island red (rir). during the first 100 days of the laying period, the glp hens lay about 40 eggs weighting on average 50 g, whilst the rir flock laid 83 eggs with a mean weight of 60 g. qtl analysis of egg qua...

Abstract The aim of the study was to develop a dual-purpose cross suitable for rearing in alternative systems and examine its growth performance carcass composition comparison parent lines. experiment carried out experimental poultry farm Institute Animal Science - Kostinbrod. developed using females layer type line L cocks from BB. latter based on Bresse Gauloise that is also dual purpose but ...