Repeatability Estimation of Some Productive Traits of Racing Homer Pigeons ( Columba livia domestica ) in Bangladesh

BACKGROUND: Racing Homer pigeons are valued for both racing and meat production; however, limited information on their growth dynamics and genetic parameters in Bangladesh restricts the development of structured and efficient breeding programs. OBJECTIVES: This study aimed to evaluate growth performance, phenotypic relationships, and repeatability of key productive traits to support genetic improvement strategies in Racing Homer pigeons. METHODS: A total of 486 squabs from 9 breeding pairs were reared under controlled conditions from hatch to 5 weeks of age. Egg weight and weekly body weights were recorded and analysed using linear mixed models, while repeatability estimates were derived from variance components. RESULTS: The mean egg weight was 19.17 g, and body weight increased markedly from 18.47 g at hatch to 401.52 g at weaning, indicating rapid early growth. Significant positive correlations (p < 0.05) were observed between egg weight and body weight across all stages, with the strongest at hatch (r = 0.73). Inter-age body weight correlations increased with age, peaking between week 4 and weaning (r = 0.98), demonstrating strong predictability of final weight. Repeatability estimates ranged from 0.27 to 0.48, suggesting low to moderate consistency influenced by both genetic and environmental factors. CONCLUSION: Racing Homer pigeons exhibit superior growth performance and exploitable genetic variability. Selection based on multiple records and early growth stages can enhance breeding accuracy and efficiency, supporting their potential for sustainable genetic improvement and dual-purpose utilisation in Bangladesh.