Hair whorl patterns on the bovine forehead may be related to breeding soundness measures

Theriogenology
Melissa G MeolaMark Deesing

Abstract

The objective of this study was to determine if there is an association between facial hair whorl patterns on the bovine forehead and sperm morphology. Breeding soundness exams were conducted on 219 yearling bulls at three Colorado State University facilities. There were 150 Angus bulls and the remaining bulls were of several different breeds. Hair whorl patterns on the forehead were classified as round or nonround epicenters. Angus bulls with round epicenters had a higher percentage of morphologically normal spermatozoa compared to nonround epicenters (P < 0.05). Hair whorls on Angus bulls were sorted into two extreme groups of round spirals, with rotation or long lines that were longer than the width of the eyes. Bulls with round spirals had a greater percentage of normal spermatozoa compared to bulls with long lines (P < 0.05). Hair whorl pattern on Angus bulls also had an effect on the percentage of bulls that had the minimum threshold value of 70% normal spermatozoa. Eighty percent of Angus bulls with round epicenters had > 70% or more normal spermatozoa compared to 59% with a nonround epicenter (P < 0.01). Fifty percent of Angus bulls with long lines failed because they had < 70% normal spermatozoa. There were no signific...Continue Reading

References

Dec 1, 1985·Acta Psychiatrica Scandinavica·C A FogelN Michelsen
May 19, 2001·Applied Animal Behaviour Science·J L. LanierK McGee
Dec 6, 2002·Nature·UNKNOWN Mouse Genome Sequencing ConsortiumEric S Lander

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Citations

May 31, 2008·Behavioural Processes·Jack Murphy, Sean Arkins
May 21, 2008·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Sherry Aw, Michael Levin
Dec 21, 2006·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·A GóreckaT Jezierski
Jan 27, 2010·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·L M Tomkins, P D Mcgreevy

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