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ORIGINAL ARTICLE
Year : 2017  |  Volume : 6  |  Issue : 6  |  Page : 264-267

Factors affecting in-vivo fertility of crossbred Egyptian - Italian buffalo semen


1 Department of Animal Reproduction and A.I., National Research Center, Dokki, Giza, Egypt
2 General Organization for Veterinary Services, Dokki, Egypt

Correspondence Address:
KGhM Mahmoud
National Research Center, Dokki, Giza, Postal code 12311, Affiliation I.D. 60014618
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2305-0500.217341

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Objective: To assess the effect of region, season and year of insemination on in-vivo fertility of Italian-Egyptian crossbred buffalo semen. Methods: A total number of 4 799 female buffaloes were inseminated by frozen semen with at least 50% post-thaw motility of Egyptian-Italian crossbred bulls in three localities in Delta, lower Egypt (El-Behira, El-Sharkia and Damietta) during the period of 2013, 2014 and 2015. The pregnancy rate after two months was evaluated during the four seasons. Results: The rate of pregnancy was significantly (P<0.000 1) differ among the three localities. The effect of year of insemination on pregnancy rate was significantly higher during 2014 and 2015 than 2013 in El-Sharkia and El-Behira. But in Damietta, the rate of pregnancy was significantly higher in 2014 than 2013 and 2015. There were no significant differences among seasons in El-Behira and Damietta governorates but there was significant (P<0.05) differences in pregnancy rate in El-Sharkia. It was higher in summer, spring and autumn than in winter. Conclusions: Localities, year of insemination and season of the year have effects on fertility of crossbred Egyptian-Italian buffalo semen.


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