Does the 1/29 Robertsonian translocation affect the fertility of Blonde d'Aquitaine breed bulls?
The effects of the 1/29 translocation upon male fertility were studied by analysis of the results of 1,350,385 first artificial inseminations with the semen of Blonde d'Aquitaine or Coopelso-93 bulls (n=220). A binomial logit model was designed, taking into account the translocation of sire, breed of sire, breed of dam, year, AI center, and all interactions between translocation, and breed of sire, and breed of dam. Male fertility was not affected by the 1/29 translocation, and the nonreturn rates at 60 to 90 days of Blonde d'Aquitaine females inseminated with the semen of carrier bulls (135,632 first AI) or noncarrier bulls (585,949 first AI) were 74.88% and 74.75%, respectively.
Gary
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Département des Productions Animales, Laboratoire INRA de cytogénétique, Ecole Nationale Vétérinaire de Toulouse, 23, chemin des Capelles, F31076 Toulouse Cedex, France.
Concordet
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Berland
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HM
Berthelot
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X
Darré
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