Mohamed, M., Abd El-Hafeez, A., Mahgoub, A., Zahed, S. (2016). SEMEN CHARACTERISTICS, REPRODUCTIVE TRACT DEVELOPMENT, FEED EFFICIENCY AND SOME BLOOD PARAMETERS OF BALADI BULLS AND THEIR CROSSBREEDS WITH ABONDANCE AND TARENTAISE. Journal of Animal and Poultry Production, 7(1), 23-32. doi: 10.21608/jappmu.2016.48262
M. Y. Mohamed; A. M. Abd El-Hafeez; A. A. S. Mahgoub; S. M. Zahed. "SEMEN CHARACTERISTICS, REPRODUCTIVE TRACT DEVELOPMENT, FEED EFFICIENCY AND SOME BLOOD PARAMETERS OF BALADI BULLS AND THEIR CROSSBREEDS WITH ABONDANCE AND TARENTAISE". Journal of Animal and Poultry Production, 7, 1, 2016, 23-32. doi: 10.21608/jappmu.2016.48262
Mohamed, M., Abd El-Hafeez, A., Mahgoub, A., Zahed, S. (2016). 'SEMEN CHARACTERISTICS, REPRODUCTIVE TRACT DEVELOPMENT, FEED EFFICIENCY AND SOME BLOOD PARAMETERS OF BALADI BULLS AND THEIR CROSSBREEDS WITH ABONDANCE AND TARENTAISE', Journal of Animal and Poultry Production, 7(1), pp. 23-32. doi: 10.21608/jappmu.2016.48262
Mohamed, M., Abd El-Hafeez, A., Mahgoub, A., Zahed, S. SEMEN CHARACTERISTICS, REPRODUCTIVE TRACT DEVELOPMENT, FEED EFFICIENCY AND SOME BLOOD PARAMETERS OF BALADI BULLS AND THEIR CROSSBREEDS WITH ABONDANCE AND TARENTAISE. Journal of Animal and Poultry Production, 2016; 7(1): 23-32. doi: 10.21608/jappmu.2016.48262
SEMEN CHARACTERISTICS, REPRODUCTIVE TRACT DEVELOPMENT, FEED EFFICIENCY AND SOME BLOOD PARAMETERS OF BALADI BULLS AND THEIR CROSSBREEDS WITH ABONDANCE AND TARENTAISE
Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Egypt.
Abstract
Twenty four Bovine males representing three genotypes: Pure local "Baladi" (B), 1/4 Baladi 3/4 Abondance (BA×A) and 1/4 Baladi 3/4 Tarentaise (BT×T). Eight males in each genotype were subjected to evaluate their semen characteristics, reproductive tract development, growth rate, feed efficiency, some blood parameters, thermo-regulatory parameters and body dimensions at puberty and sexual maturity. BT×T bulls showed the best feed efficiency compared with those of BA×A and B bulls. Serum total protein, albumin, globulin, glucose, cholesterol, T3 and testosterone in BT×T had the highest values, followed by BA×A, while B bulls had the lowest ones, either at puberty or sexual maturity. Total weight gain and daily weight gain were significantly higher in BT×T compared to BA×A and B bulls. Thermo-regulatory parameters and body dimensions were affected by the different genotypes. Crossbreeds bulls (BT×T and BA×A) reached age of puberty, sexual maturity and slaughter weight (60 days post sexual maturity) earlier than Baladi bulls. Semen characteristics among the three genotypes were highly significant (P<0.0001) especially of BT×T followed by BA×A compared to B bulls. Testes parameters of BT×T bulls had the highest values for all studied parameters, followed by BA×A, while those of B were the lowest. Sperm production per gram of testicular tissue was also significantly higher in BT×T bulls than the other two genotypes. This study indicated that the superiority of crossbreed bulls especially; BT×T in growth, reproductive performance and feed efficiency compared with pure Baladi bulls.
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