青春期前公羊羔睾丸生长和促性腺激素分泌的品种差异。

Breed differences in testicular growth and gonadotropin secretion in prepubertal ram lambs.

作者信息

Lucas J R, Notter D R, McClaugherty F S, Anderson G W, Gwazdauskas F C

机构信息

Virginia Polytechnic Institute and State University Blacksburg, VA 24061 USA.

出版信息

Theriogenology. 1983 May;19(5):749-58. doi: 10.1016/0093-691x(83)90116-4.

DOI:10.1016/0093-691x(83)90116-4

PMID:16725823

Abstract

Scrotal circumference (SC) and plasma concentrations of luteinizing hormone (LH) and follicle stimulating hormone (FSH) were measured in 19 Finnish Landrace (Finn) and 29 Rambouillet crossbred ram lambs raised in confinement and in 21 Finn and 19 Dorset crossbred ram lambs raised on pasture. SC was larger (P<0.05) for Finn crossbreds than for Rambouillet crossbreds only at 70 and 100 days of age. Finn crossbreds had more (P<0.05) plasma LH and FSH than did Rambouillet crossbreds at 20 and 44 days but not at 70 days. SC was larger for Dorset crossbreds than for Finn crossbreds at the same age, but SC was larger (P<0.05) for Finn crossbreds than for Dorset crossbreds at the same weight. Finn and Dorset crossbreds differed (P<0.10) in plasma LH and FSH concentration at 77 days only (Finn>Dorset).

摘要

对19只圈养的芬兰长白（Finn）杂交公羊羔羊和29只圈养的兰布耶杂交公羊羔羊，以及21只放牧的芬兰杂交公羊羔羊和19只放牧的多塞特杂交公羊羔羊，测量了阴囊周长（SC）以及促黄体生成素（LH）和促卵泡生成素（FSH）的血浆浓度。仅在70日龄和100日龄时，芬兰杂交公羊的SC大于兰布耶杂交公羊（P<0.05）。在20日龄和44日龄时，芬兰杂交公羊的血浆LH和FSH比兰布耶杂交公羊多（P<0.05），但在70日龄时并非如此。在相同年龄时，多塞特杂交公羊的SC大于芬兰杂交公羊，但在相同体重时，芬兰杂交公羊的SC更大（P<0.05）。仅在77日龄时，芬兰和多塞特杂交公羊的血浆LH和FSH浓度存在差异（芬兰>多塞特，P<0.10）。