Attainment of spermatogenesis in Swedish cross-bred boars
Attainment of spermatogenesis in Swedish cross-bred boars
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DOI：
10.1111/j.1439-0442.1996.tb00442.x
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发表时间：
1996-05-01
期刊：
影响因子：
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通讯作者：
Einarsson, S
中科院分区：
文献类型：
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作者：
Malmgren, L;RodriguezMartinez, H;Einarsson, S
采用20头100 ~ 180日龄瑞典杂交公猪，对其睾丸分化和附睾成熟进行了研究。所有动物的性索在100日龄时都小而结实。精子发生在大约115日龄时开始，并在180日龄时完成，即精子小管的细胞组织表明性成熟的睾丸具有正常的精子发生。125日龄时，在附睾尾只发现少量精子。此外，精子形态改变的频率很高。尾部精子浓度随年龄增加而增加，同时异常精子的发生频率降低。然而，并不是所有的公猪在180日龄时都有“成熟”的附睾尾部精液图像。
Twenty peripubertal Swedish cross-bred boars were used to study the testicular differentiation and the maturation of spermatozoa (epididymal) between 100 and 180 days of age. In all animals the sex cords were small and solid at 100 days of age. Spermatogenesis started at approximately 115 days of age and was completed, i.e. the cellular organization of the seminiferous tubules indicated a sexually mature testis with normal spermatogenesis, at 180 days of age. By 125 days of age only a few spermatozoa were found in the cauda epididymidis. Furthermore, a high frequency of sperm morphological alterations were seen. The sperm concentration in the cauda increased with increasing age, and simultaneously the frequency of abnormal spermatozoa decreased. However, not all boars had a 'mature' semen picture in the cauda epididymis at 180 days of age.