棕色田鼠睾丸及附睾胚后发育的形态学变化  

Morphological Changes in Postnatal Development of Testes and Epididymides in Mandarin Voles

作　　者：王建礼[1,2] 王慧春 邰发道[2] 

机构地区：[1]北方民族大学生命科学与工程学院,银川750021 [2]陕西师范大学生命科学学院,西安710062 [3]临汾市一中,山西临汾041000

出　　处：《四川动物》2010年第2期272-276,共5页Sichuan Journal of Zoology

基　　金：国家民委生态系统模型及应用重点实验室项目;高等学校博士学科点专项科研基金(20060718)

摘　　要：通过组织学方法,对产后1d、10d、25d、45d、60d及70d的棕色田鼠Lasiopodomys mandarinus睾丸和附睾发育进行了观察,以探讨其精子发生特点。结果发现,1d棕色田鼠的生殖细胞主要是生殖母细胞和前精原细胞;10d出现大量精原细胞,睾丸间质细胞明显;25d出现精子细胞;45d有少量精子出现;60d和70d具有各级生精细胞,睾丸生精小管和附睾内出现大量成熟精子。睾丸生精小管管径和生精上皮厚度随日龄增加,于60d达到最大;附睾管腔直径和附睾上皮厚度也于60d达到最大。这些结果表明,棕色田鼠在生后45d左右进入青春期,60d左右达到性成熟,精子的产生及成熟与附睾的发育同步。By using histological methods, postnatal changes in the testes and epididymides from birth to adulthood were examined using mandarin voles （Lasiopodomys mandarinus） of 1, 10, 25, 45, 60, and 70 days of age. Results showed that germinal ceils were mainly goncytes and prospermatogonia at day 1 ; abundant spermatogonia, and Leydig cells were found at day 10 ; Spermatoon were generated at day 25 ; a few mature sperm were found at day 45 ; all kinds of spermatogenic cells emerged and lots of mature sperm were produced in seminferous tuble and epididymis at day 60 and day 70. In addition, the diameter of the seminferous tubule and thickness of the seminiferous epithelium significantly increased with pups＇ age, reaching the highest level at day 60. Furthermore, the diameter of the epididymis duct cavity and the thickness of the epididymal epithelium reached the highest level at day 60. These results suggest that mandarin voles hit puberty at the 45 days and become sexually mature at 60 days. Sperm were produced and became mature synchronically with the development of the epididymides.

关 键 词：棕色田鼠 生精细胞 附睾 发育 

分 类 号：Q954[生物学—动物学]