Advancing Technology for Practical Use of Cryopreserved Boar Sperm to Improve Opportunities for Profitable Pork Production
Plant And Animal Genetic Resources Preservation Research Unit
2012 Annual Report
1a.Objectives (from AD-416):
Investigate which tools are most valuable for determining the quality of frozen-thawed semen so that this will facilitate an improvement in fertility when using frozen semen thus resulting in increases in the numbers of valued boars that have semen cryopreserved and in producers who use frozen semen to improve their genetics.
1b.Approach (from AD-416):
Aim 1: Semen will be collected, cryopreserved and analyzed post-thaw using computer automated semen analysis in order to categorize the samples into Good, Moderate and Poor quality. Additional analyses will also be performed using flow cytometry, in vitro fertilization, and sperm/egg binding assays. Based on the quality categorization a gilt artificial insemination trial will be performed. The data from these analyses will be used in a multivariate analysis to determine a parsimonious model for predicting the best opportunities for achieving fertility with frozen-thawed boar sperm.
Aim 2: The new model derived from the data in Aim 1 will then be used to perform an artificial insemination trial based on the new semen quality rankings.
Aim 3: The scope of this aim will include model development derived from Aims 1 and 2, a survey of the swine industry to determine their level of knowledge about swine artificial insemination, and the creation of workshops for boar owners and stud managers to transfer the technologies obtain in Aims 1 and 2.
Efforts in the second year included additional testing of samples to assess in vitro sperm quality following cryopreservation and shipping samples to collaborators for artificial insemination trials. ADODR monitoring for this project was done by regular phone contact and by email.