Boutrous, N. (2025). GENETIC RESPONSE OF SOME BODY MALE'S MEASUREMENTS AND REPRODUCTION FOR GIMMIZAH CHICKENS SELECTED FOR BODY CIRCUMFEREANCE. Egyptian Poultry Science Journal, (), -. doi: 10.21608/epsj.2025.83083.1170
Nabile Galabe Boutrous. "GENETIC RESPONSE OF SOME BODY MALE'S MEASUREMENTS AND REPRODUCTION FOR GIMMIZAH CHICKENS SELECTED FOR BODY CIRCUMFEREANCE". Egyptian Poultry Science Journal, , , 2025, -. doi: 10.21608/epsj.2025.83083.1170
Boutrous, N. (2025). 'GENETIC RESPONSE OF SOME BODY MALE'S MEASUREMENTS AND REPRODUCTION FOR GIMMIZAH CHICKENS SELECTED FOR BODY CIRCUMFEREANCE', Egyptian Poultry Science Journal, (), pp. -. doi: 10.21608/epsj.2025.83083.1170
Boutrous, N. GENETIC RESPONSE OF SOME BODY MALE'S MEASUREMENTS AND REPRODUCTION FOR GIMMIZAH CHICKENS SELECTED FOR BODY CIRCUMFEREANCE. Egyptian Poultry Science Journal, 2025; (): -. doi: 10.21608/epsj.2025.83083.1170
GENETIC RESPONSE OF SOME BODY MALE'S MEASUREMENTS AND REPRODUCTION FOR GIMMIZAH CHICKENS SELECTED FOR BODY CIRCUMFEREANCE
Articles in Press, Accepted Manuscript, Available Online from 19 May 2025
Two hundred and twenty hens besides twenty two males were randomly chosen from Gimmizah (GM) flock and considered as base population (G0) composing pen's families (10 hens and one male / pen). Day-old chicks produced from G0 were wing-banded and selected for breast circumference (BC) at 12-wk of age within families. Chickens were selected as parents of the next generation and continued throughout six generations. A total number of 6750 hatching GM eggs produced from chickens aged between 45-50 wks and representing the six experimental consecutive generations were used for hatching trials. Data were collected for some physical parameters of GM males at 1 day, 8, 12, 25 and 45 weeks of age for six generations. Hatched male body weights (BW1) were significantly higher for selected line among G0, G4 and G5 generations compared to those for control one. Selection for chicken BC significantly improved fertility percentage with advanced generations. Moreover, fertility percentage was significantly increased for selected chickens compared to those for control line at fifth generation. Heritability estimates seem to be high for all body weights at studied ages through the six generation ranked between 0.50 among the most ages and generations with 0.97 for BW8 and BW12 at G4.Also, BC represented high estimates of h^2 among the ages and generations ranged between 0.32 for BC12 at G5 and 0.69 for BC12 at G0. Genetic correlations between fertility and body weights among the studied generations were low differed between 0.10 up to 0.34 , with value of 0.28 for BW1 at G5. It is concluded from this study that fertility reduction should be taken into consideration during selection of breast circumference, besides other breast measurements such as breast length and width should be included in the coming genetic selection program.
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