Breeding soundness evaluation and semen analysis for predicting bull fertility
Breeding soundness evaluation and semen analysis for predicting bull fertility
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DOI：
10.1111/j.1439-0531.2008.01186.x
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发表时间：
2008-07-01
影响因子：
1.7
通讯作者：
Thundathil, J. C.
中科院分区：
文献类型：
--
作者：
Kastelic, J. P.;Thundathil, J. C.
公牛繁殖力受多种因素影响。尽管未经选择的群体中 20-40% 的公牛生育能力可能下降，但很少有公牛完全不育。育种健全性是指公牛让母牛怀孕的能力。标准育种健全性评估可识别出生育力严重不足的公牛，但不能始终如一地识别出生育力较低的公牛。在这方面，使用符合最低质量标准的冻融精液（来自商业人工授精中心的公牛）可能会导致怀孕率相差 20-25 个百分点。尽管没有任何单一的诊断测试可以准确预测产生明显正常精液的公牛的生育力变化，但最近的研究表明，实验室测试的组合可以预测生育力。本综述重点关注基于分子、细胞和整体动物水平评估的公牛繁殖力预测的最新进展。
Bull fertility is influenced by numerous factors. Although 20-40% of bulls in an unselected population may have reduced fertility, few are completely sterile. Breeding soundness refers to a bull's ability to get cows pregnant. A standard breeding soundness evaluation identifies bulls with substantial deficits in fertility, but does not consistently identify sub-fertile bulls. In this regard, the use of frozen-thawed semen (from bulls in commercial AI centres) that meets minimum quality standards can result in pregnancy rates that differ by 20-25 percentage points. Although no single diagnostic test can accurately predict variations in fertility among bulls that are producing apparently normal semen, recent studies suggested that a combination of laboratory tests were predictive of fertility. This review is focused on recent developments in prediction of bull fertility, based on assessments at the molecular, cellular and whole-animal levels.