Endocrine differences in rams after genetic selection for testis size

Publisher Website
Google Scholar
Abstract
Summary. Testis diameter and body weight were recorded from 6 to 76 weeks of age in ram lambs from two established lines selected for high (H) and low (L) testis size. While testis growth was greater in the H line up to 14 weeks of age (P P P P P <0·001 at 20 weeks). There was no difference in the rate of testis growth between the entire and hemicastrated lambs from the H line from 6 to 12 weeks of age. It can be concluded that there is an underlying genetic difference in pituitary gland and/or hypothalamic activity in ram lambs from the two selected lines.