Meola Melissa G, Grandin Temple, Burns Patrick, Deesing Mark
Department of Animal Sciences, Colorado State University, Fort Collins, CO 80523-1171, USA.
Theriogenology. 2004 Aug;62(3-4):450-7. doi: 10.1016/j.theriogenology.2003.10.021.
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 significant differences in the remaining non-Angus bulls. Hair whorl patterns may be useful for making early culling decisions.
本研究的目的是确定牛前额的面部毛发涡旋模式与精子形态之间是否存在关联。在科罗拉多州立大学的三个设施中，对219头一岁公牛进行了繁殖健全性检查。其中有150头安格斯公牛，其余公牛为几个不同品种。前额的毛发涡旋模式被分类为圆形或非圆形中心点。与非圆形中心点的安格斯公牛相比，具有圆形中心点的安格斯公牛形态正常的精子百分比更高（P < 0.05）。安格斯公牛的毛发涡旋被分为两组极端的圆形螺旋，一组有旋转或长线，其长度超过眼睛宽度。与有长线的公牛相比，有圆形螺旋的公牛正常精子的百分比更高（P < 0.05）。安格斯公牛的毛发涡旋模式也对达到正常精子最低阈值70%的公牛百分比有影响。80%具有圆形中心点的安格斯公牛正常精子>70%或更多，相比之下，非圆形中心点的这一比例为59%（P < 0.01）。50%有长线的安格斯公牛因正常精子<70%而不合格。其余非安格斯公牛之间没有显著差异。毛发涡旋模式可能有助于做出早期淘汰决策。
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