Immotile Short‐Tail Sperm Defect in Nelore (Bos taurus indicus) Breed Bulls |
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Authors: | JB Siqueira RO Pinho SEF Guimarães T Miranda Neto JD Guimarães |
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Institution: | 1. Faculdade de Medicina Veterinária e Zootecnia/UNESP – Botucatu, SP;2. Universidade Federal de Vi?osa, MG;3. Ms Autonomous Veterinary;4. Universidade Federal de Vi?osa, MG, Brazil (Adviser) |
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Abstract: | This case study reported the presence of short tail sperm defect in the semen of three Nelore breed bulls. The sperm presented 0% of motility in the three animals evaluated and a total of 70%, 61% and 34% of pathologies of the intermediate piece of the tail respectively for animals 1, 2 and 3. It was identified that animals 2 and 3 had high degree of inbreeding, although no relationship was found with animal 1. Animal 2 was the only one that presented inbreeding coefficient (6.25%). His half‐sib (animal 3) and animal 1, from the same herd, had shown no inbreeding, showing that inheritance is not the only determinant factor for its incidence on Nelore males. |
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