Reproductiveaxis gene regulation during photostimulation and photorefractoriness in Yangzhou goose ganders.

ABSTRACT:

Background

The Yangzhou goose is a long-day breeding bird that has been increasingly produced in China. Artificial lighting programs are used for controlling its reproductive activities. This study investigated the regulations of photostimulation and photorefractoriness that govern the onset and cessation of the breeding period.

Results

Increasing the daily photoperiod from 8 to 12 h rapidly stimulated testis development and increased plasma testosterone concentrations, with peak levels being reached 2 months after the photoperiod increase. Subsequently, testicular activities, testicular weight, spermatogenesis, and plasma testosterone concentrations declined steadily and reached to the nadir at 5 months after the 12-hour photoperiod. Throughout the experiment, plasma concen

SUBMITTER: Zhu H 

PROVIDER: S-EPMC5324292 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature