This work wascarried out with the objective of studying the growth profile and the nutrientsdeposition on organs (heart, liver, gizzard, intestine and proventricle) ofmale and female broiler chickens from Ross and Cobb lineages. It was used 1,920chicks at the age of one day placed in experimental shed boxes on the floor.The experimental design was completely randomized in a 2 × 2 factorialmodel composed of 2 sexes (mates and females) and two strains with 4 repetitionsof 120 broilers each. The broilers were fed formulated diets to supply the nutrientrequirements according to each breeding phase. After 24 hours of fasting, thebroilers were weighed and slaughtered (1 to 56 days) every week. The weightand components of the organs (water, ash, protein and fat) were weekly obtained,with parameters estimated by the equation of Gompertz and the growth rates weredetermined by the derived of the equations. There was no influence of the strainson the deposition of nutrients on the heart. Ross chicks were more precociouson growth and on the deposition of water and ashes in the liver, therefore itpresents a greater metabolic activity in digestion and nutrient synthesis. Cobbstrain was more precocious in the development of the intestine and the growthand deposition of nutrients on the proventricle. Males are more precocious thanfemales on the growth rate and on the protein, fat and water deposition in thegizzard.
