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Immotile Short‐Tail Sperm Defect in Nelore ( Bos taurus indicus ) Breed Bulls
Author(s) -
Siqueira JB,
Pinho RO,
Guimarães SEF,
Miranda Neto T,
Guimarães JD
Publication year - 2010
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/j.1439-0531.2009.01494.x
Subject(s) - inbreeding , breed , biology , zoology , herd , sperm , semen , genetics , population , demography , sociology
Content 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.