Factors affecting the successful cryopreservation of honey bee (Apis mellifera) spermatozoa

Facteurs jouant un rôle dans le succès de la cryopréservation de spermatozoïdes de l'abeille Apis mellifera

Brandon Kingsley Hopkins , Charles Herr

This report is about cryopreservation of honey bee semen. There has been little advancement of this technology over the past 20 years. Cytotoxicity of the cryoprotectants, temperature sensitivity, freezing rate, and cold shock were investigated. The least toxic cryoprotectant was DMSO. Spermatozoa were tolerant to temperatures up to 40 °C. A programmable freezing rate of 3 °C/min proved superior in most treatments when compared to a freezing rate of approximately 28000 °C/min. Highest viability of spermatozoa (93%) post cryopreservation resulted from the treatment containing a 10% DMSO diluent, slow cooled to just above freezing, and frozen at a rate of 3 °C/min. Spermatozoa frozen in such a manner yielded viability and motility indistinguishable from that of unfrozen semen. Promising results warrant a field study.

Mots clés: cryopreservation; Apis mellifera; spermatozoa; cold shock; vitrification<br>---<br>cryopréservation; spermatozoïdes; stress thermique; froid; vitrification

Domaines: Zoologie des invertébrés; Biodiversité; Ecologie, Environnement; Science des productions animales

Brandon Kingsley Hopkins, Charles Herr. Factors affecting the successful cryopreservation of honey bee (Apis mellifera) spermatozoa. Apidologie, 2010, 41 (5), ⟨10.1051/apido/20010006⟩. ⟨hal-00892064⟩