Characterization of ovarian morphology and reproductive hormones in Zhedong white geese (Anser cygnoides domesticus) during the reproductive cycle

AbstractZhedong white goose (Anser cygnoides domesticus) is a native Chinese breed with strong broodiness and low egg production, which is related to the physiology of reproduction. However, thus far, the physiology of goose reproduction has not been well elucidated. In the present study, the ovarian morphology and reproductive hormones of Zhedong white geese were investigated during the reproductive cycle (the laying and brooding periods). The results showed that the surface of the ovary was atrophied and follicular atresia appeared to some extent in the brooding period compared with the laying period. The concentrations of follicle ‐stimulating hormone, progesterone and luteinizing hormone were significantly higher than those in the brooding period (p <  0.05). In contrast, the concentrations of prolactin (PRL) and anti‐Müllerian hormone (AMH) in the laying period were significantly lower than those in the brooding period (p <  0.05). In addition, the mRNA expression levels of PRL, AMH, dopamine‐β‐hydroxylase (DβH) and cytochrome P450 side‐chain cleavage enzyme (P450scc) were detected in the hypothalamus, pituitary and ovaries by using real‐time polymerase chain reaction. The results showed that AMH mRNA was ex pressed specifically in ovary tissue. The expression levels of DβH and PRL in the brooding period was significantly higher than those in the laying period in the three tissues, especially in the early and middle stages of the brooding period...
Source: Journal of Animal Physiology and Animal Nutrition - Category: Zoology Authors: Tags: ORIGINAL ARTICLE Source Type: research