Performance Line
As with research into genetic selection for any
trait, having data available on relevant traits is the
first step. And that’s where we come in – many of
you have collected the desired data during your
bulls’ breeding soundness exams. Below are the
data points the researchers wish to capture:
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Sperm Concentration
Motility
Percent Normal
Percent Abnormal
Percent Primary Abnormalities
Percent Secondary Abnormalities
Pass/Fail
Reason for Fail
30 | AUGUST / SEPTEMBER 2019
If available, these metrics may also be of interest:
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Detached Head
Proximal Droplet
Distal Droplet
Abnormal Head
Bent Tail
Midpiece
Motility Score
If you are interested in providing data for this
project and to help develop genetic selection
tools for male fertility in the Limousin breed,
please contact me via email at [email protected].
Kastelic, J.P., Thundathil, J.C., and L. F. C. Brito.
2012. Bull BSE and semen analysis for predicting
bull fertility. Clinical Theriogenology. 4:277-287.
LT