Effect of photoperiod on serum hormone concentrations during the annual reproductive cycle in geese.
The poor egg-laying rate of geese hinders the development of the goose industry; therefore, the reproductive performance of geese is an important area of investigation. To evaluate the relationship between photoperiod, reproductive hormones, and reproductive activity during the egg-laying cycle in geese under natural conditions, we collected blood samples from Sichuan white geese and Xupu geese to quantify changes in prolactin (PRL), estradiol (E2), vasoactive intestinal polypeptide (VIP), follicle stimulating hormone (FSH), gonadotropin-inhibitory hormone (GnIH), and luteinizing hormone (LH). We also calculated the rate of egg laying for the two populations during the egg-laying cycle. We show that the egg-laying rate and the serum concentration of some hormones (PRL, E2, VIP, FSH, GnIH, and LH) differed significantly between the two populations during the pre-laying, laying, and ceased-laying periods. Serum LH concentrations may be associated with maturation of the ovary and oviducts, whereas FSH, PRL, and GnIH play important roles in egg laying. These results provide a useful resource for future studies examining the laying rate in geese.
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
X Z
XZ
Zhao
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
G L
GL
Gao
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
H W
HW
Wang
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
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Q
Li
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
K S
KS
Zhang
Chongqing Academy of Animal Science, Chongqing, China.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China.
H
H
Zhong
Chongqing Academy of Animal Science, Chongqing, China wangqigui@hotmail.com.|Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China wangqigui@hotmail.com.
Q G
QG
Wang
D000818:Animals; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D005777:Geese / Q000097:blood*; D007987:Gonadotropin-Releasing Hormone / Q000097:blood; D006062:Gonadotropins / Q000097:blood; D006728:Hormones / Q000097:blood*; D007986:Luteinizing Hormone / Q000097:blood; D010053:Ovary / Q000502:physiology; D017440:Photoperiod; D011388:Prolactin / Q000097:blood; D012098:Reproduction / Q000502:physiology*; D014660:Vasoactive Intestinal Peptide / Q000097:blood
D006062:Gonadotropins; D006728:Hormones; D007987:Gonadotropin-Releasing Hormone; D014660:Vasoactive Intestinal Peptide; D004958:Estradiol; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone