关键词: 睾丸, 附睾, 生殖力, 猪

Abstract: 197 heads of Berkshire (B), Yanan (Ya) and their reciprocal crossbreds BYa and YaB, Duroc X Ya (Dya) F₁ boar pigs, their testies and epididymides are got by surgery technique in 7 stages from birth to 90 days old respectively, and histologic sections are prepared for histological observations on the development in seminiferous tubules, epididymis ducts and spermatids. The measurement data are through statistical analysis. The results show that the size of seminiferous tubule is a trait of high heritability and has no expressed heterotic effect, and the development of testies with some maternal influence in crossbreeding. The long nuclear spermatids present in seminiferous tubules in Yanan boar pigs at 55 days old, and in Bya and DYa at 80 day old, but in B and YaB do not present until 90 days old.

Key words: TESTIS, EPIDIDYMIS, ANIMAL BREEDING, FERTILITY (ANIMAL), HOSE