Parent and Offspring Performances of Different Genetic Groups of Chicken in Selected Economically-Important Traits Under Intensive Rearing System

This study investigated the performance of parent and offspring chickens from six genetic groups under an intensive rearing system, focusing on key economic traits. Using a Completely Randomized Design, 30 birds (6 roosters and 24 hens) were bred, and their offspring evaluated for productive traits (initial and final body weight, average daily gain [ADG], feed conversion ratio [FCR]), reproductive traits (fertility and hatchability), and aesthetic traits (egg size and yolk color). Data were analyzed using descriptive statistics, ANOVA, and Chi-square tests. Results showed that body weight differences among roosters became significant only by Week 20, with R1 showing superior growth and FCR, while R6 exhibited strong late-stage weight gain but poorer feed efficiency. Offspring outperformed parent lines in both growth and FCR, indicating genetic progress and possible hybrid vigor. Fertility was generally high, but hatchability varied significantly due to temperature-related hatching issues, suggesting post-fertilization losses. Most hens produced small eggs, though moderate numbers of medium-sized eggs were recorded, and yolk color differences were linked to genetic variation in pigment absorption. Egg size distribution showed significant genetic influence. These findings highlight the value of genetic selection, improved incubation management, and genotype-environment adaptation in enhancing productivity under intensive poultry systems.