Oral thyroxine administration mimics photoperiodically induced gonadal growth in Japanese quail

Shinobu Yasuo, Shizufumi Ebihara, Takashi Yoshimura

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Most temperate-zone animals are seasonal breeders. In a previous study, it was found that light-induced hormone conversion of thyroxine (T4) prohormone to active 3,5,3′-triiodothyronine (T3) in the mediobasal hypothalamus regulates photoperiodic response of gonads in Japanese quail. Here the effect of T4 or T3, administered in drinking water, on testicular growth in the Japanese quail kept under short days is shown. Testicular length was significantly increased in birds given T 4 at doses of 4, 8 and 10 mg/L, while any dose of T3 had little effect on testicular growth. High doses (8 and 10 mg/L) of T4 and T3 resulted in high mortality and/or reduction of bodyweight. Among all of the treatment, 4 mg/L of T4 was the most effective on photoperiodic testicular growth, which caused little reduction in bodyweight. These data provide a new conventional method for promoting gonadal growth under short days.

本文言語英語
ページ(範囲)407-410
ページ数4
ジャーナルAnimal Science Journal
75
5
DOI
出版ステータス出版済み - 10 1 2004
外部発表はい

All Science Journal Classification (ASJC) codes

  • 農業および生物科学(全般)

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