Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes
Abo-Gamil, Z., El-Bayomi, K., Abo-Salem, M., Ramadan, S., Darwish, S. (2017). Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes. EKB Journal Management System, 2(3), 53-59. doi: 10.21608/bjas.2017.164545
Z.H.S. Abo-Gamil; Kh.M. El-Bayomi; M.E.S. Abo-Salem; ShI. Ramadan; S.A. Darwish. "Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes". EKB Journal Management System, 2, 3, 2017, 53-59. doi: 10.21608/bjas.2017.164545
Abo-Gamil, Z., El-Bayomi, K., Abo-Salem, M., Ramadan, S., Darwish, S. (2017). 'Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes', EKB Journal Management System, 2(3), pp. 53-59. doi: 10.21608/bjas.2017.164545
Abo-Gamil, Z., El-Bayomi, K., Abo-Salem, M., Ramadan, S., Darwish, S. Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes. EKB Journal Management System, 2017; 2(3): 53-59. doi: 10.21608/bjas.2017.164545

Estimation of Gentic and Phenotypic Parameters for some Productive and Reproductive Traits in Egyptian Buffoloes

Benha Journal of Applied Sciences
Article 7, Volume 2, Issue 3, December 2017, Page 53-59  XML PDF (292.04 K)
Document Type: Original Research Papers
DOI: 10.21608/bjas.2017.164545
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Authors
Z.H.S. Abo-Gamil1; Kh.M. El-Bayomi2; M.E.S. Abo-Salem3; ShI. Ramadan1; S.A. Darwish4
1Animal Wealth Development Dept., Faculty of Veterinary Medicine, Benha Univ., Benha, Egypt
2Animal Wealth Development Dept., Faculty of Veterinary Medicine, Zagazig Univ., Benha, Egypt
3Forensic Medicine and Toxicology Dept., Dean of Faculty of Veterinary Medicine, Benha Univ., Benha, Egypt
4Animal Production Research Institute, ARC., Ministry of Agriculture, Doki, Giza, Egypt.
Abstract
The present study aimed to display effects of age at first services, age at first calving (AFC), calving interval, days open, number of services per conception, days dry, season of calving on total milk yield (TMY) and 305 milk yield (305MY). Also, to estimate effect of season and parity on calving interval (CI) and days open and then the effect of level of production on service per conception, age at first service, age at first calving, calving interval and days open. Heritability estimates for 305-day milk yield (0.18), days open (0.18), dry period (DP) (0.12), TMY (0.17) and CI (0.19). High heritability estimates were obtained for AFC (0.68) and lactation length (LL) (0.78). There were high positive genetic and phenotypic correlations between total milk yield and 305-day milk yield and low genetic and phenotypic correlations between most studied traits. Average EBV for AFS, AFC and 305MY were higher in cow than sire and dam. Also, average EBV for LL and DO were higher in sire than in cow and dam and average EBV for CI and DP were higher in dam than in cow and sire. But TMY was equal in sire and dam and higher than cow.
Keywords
Dairy buffalo; Productive and reproductive traits; Heritability; Genetic and phenotypic correlation; Breeding values
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