保留的细胞质液滴（CD）在公猪中提供了最丰富的精子异常并降低了生育力。尚不清楚精液部分的高CD率是否可以赔偿。目的是探讨CD与定量和定性精子性状的关系对母猪繁殖性能的影响。对1497例授精进行了回顾性数据分析。射精（n=260）被分配到三组低（<10%），中等(≥10%至<15%)，和高（≥15％）CD率。高CD组平均精子数最低(2.08×109/mL)。两组之间的膜完整性和线粒体活性没有差异。断点分析表明，当CD率超过11％时，产仔数会向较低的方向转变。分组比较显示产仔数没有差异(p=0.205)，高CD组的分娩率稍高（p＆lt;0.001），这与储存的精液样品对温度应激的抵抗力较高（p＆lt;0.001）和精子运动性较高（p＆lt;0.001）相吻合。总之,猪精液中CD患病率的增加可以通过对温度胁迫的高耐受性来补偿，而每个剂量的精子数量则不太相关。
Retained cytoplasmic droplets (CD) provide the most abundant sperm abnormality in boar and reduce fertility. It is still unclear as to whether high CD rates in semen portions are compensable. The aim was to explore the impact of CD in relation to quantitative and qualitative sperm traits on fertility performance of sows. Retrospective data analysis of 1497 inseminations was performed. Ejaculates (n = 260) were assigned to three groups with low (<10%), medium (≥10% to <15%), and high (≥15%) CD rates. Average sperm numbers were lowest in the high CD group (2.08 × 109/mL). Membrane integrity and mitochondrial activity did not differ between the groups. Breakpoint analysis indicated a shift towards lower litter sizes when the CD rate exceeded 11%. Group comparisons revealed no difference in litter size (p = 0.205), together with a slightly higher farrowing rate in the high CD group (p < 0.001), which coincided with higher resistance against temperature stress in the stored semen samples (p < 0.001) and a higher sperm motility (p < 0.001). In conclusion, an increased prevalence of CD in boar semen is compensable by high tolerance against temperature stress, whereas sperm numbers per dose are less relevant.
