The aim of the study was to determine the relation between the semen quality, frequency of sperm defects, sperm dimensions and shape, and the ejaculate volume of Large White and Landrace boars. A total of 648 ejaculates collected from 31 Large White and 30 Landrace boars were divided into three groups according to the criterion of the ejaculate volume. In this study Landrace boars produced ejaculates with higher volume, sperm concentration, and total numbers of spermatozoa than Large White boars. Landrace boars also showed a lower frequency of sperm with morphological abnormalities (P < 0.05). Landrace boars sperm had larger heads, which were by 0.15 μm longer, and by a larger perimeter and area (P < 0.05). Landrace boar spermatozoa also had a longer flagellum and were generally larger and by 2.07 μm longer than Large White boar sperm (P < 0.05). Significant differences were also found in the shape of sperm of the two breeds (P < 0.05). Landrace boars sperm had more elongated heads, and the ratio of head size to flagellum length was lower than in Large White boars sperm (P < 0.05). Sperm from ejaculates with low volume had a shorter flagellum and a greater head length/flagellum length ratio than sperm from medium- and high-volume ejaculates (P < 0.05).

中文翻译：

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品种和射精量对公猪精子形态和精液参数的影响

该研究的目的是确定精液质量、精子缺陷频率、精子尺寸和形状以及大白公猪和长白公猪的射精量之间的关系。共采集了31头大白公猪和30头长白公猪的648次射精，根据射精量的标准分为三组。在这项研究中，长白公猪的射精量、精子浓度和精子总数均高于大白公猪。长白公猪也表现出较低频率的形态异常精子（P  < 0.05）。长白公猪的精子头更大，长了 0.15 微米，周长和面积更大（P < 0.05)。长白公猪精子的鞭毛也更长，并且通常比大白公猪精子大 2.07 μm（P  < 0.05）。两个品种的精子形状也存在显着差异（P  < 0.05）。长白公猪精子的头部更长，头部大小与鞭毛长度之比低于大白公猪精子（P  < 0.05）。与中等和高射精量的精子相比，低量射精的精子鞭毛更短，头部长度/鞭毛长度比更大（P  < 0.05）。