Immunocytochemical localization of gonadotropins during the development of XX and XY Nile tilapia |
| |
| Authors: | F Sakai I Swapna C C Sudhakumari M V N L Ganesh H Kagawa T Kobayashi H Fan Y Nagahama B Senthilkumaran |
| |
| Institution: | (1) Department of Animal Sciences, School of Life Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500 046, India;(2) Laboratory of Reproductive Biology, National Institute of Basic Biology, Okazaki 444-8585, Japan;(3) Department of Biological Production and Environmental Science, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan;(4) National Research Institute of Aquaculture, Tamaki Mie, 516-0423, Japan |
| |
| Abstract: | Gonadal development and steroidogenesis in teleosts is regulated by two gonadotropic hormones; luteinizing hormone (LH) and
follicle-stimulating hormone (FSH). Earlier studies in tilapia have shown that FSH-β and LH-β appear by 14 days after hatching
(dah), results from the current study corroborate with these previous reports in tilapia. Here we demonstrate the appearance
of LH in pituitary between 14 and 20 dah. In addition to this the present study primarily focuses on any possible differences
in appearance of LH-β and FSH-β immunoreactivity between XX and XY population of Nile tilapia. LH immunoreactivity was found
to be lower in pituitary of XX fish when compared to XY fish. The development of FSH-β immunoreactivity in pituitary of the
Nile tilapia is also presented. Overall, it remains to be established what significance these findings on the appearance of
gonadotropins hold for sex differentiation in tilapia.
F. Sakai and I. Swapna contributed equally. |
| |
| Keywords: | FSH LH Ontogeny The Nile tilapia XX-XY fish |
| 本文献已被 SpringerLink 等数据库收录！ |
|
