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| Content Provider | Springer Nature Link |
|---|---|
| Author | Xu, Gefeng Huang, Tianqing Jin, Xian Cui, Cunhe Li, Depeng Sun, Cong Han, Ying Mu, Zhenbo |
| Copyright Year | 2015 |
| Abstract | In non-mammalian vertebrates, estrogens and expressions of cyp19a1 and foxl2 play critical roles in maintaining ovary differentiation and development, while dmrt1 and sox9 are male-specific genes in testicular differentiation and are highly conserved. In order to deeply understand the morphological change, sex steroids level and molecular mechanism of triploid female gonadal reversal in rainbow trout, we studied the ovary morphology, tendency of estradiol-17β (E2) and testosterone (T) levels and the relative expressions of dmrt1, cyp19a1, sox9 and foxl2 in juvenile and adult fish. Our results demonstrated that the development of triploid female gonads in rainbow trout went through arrested development, oocytes dedifferentiation, ovary reconstruction and sex reversal finally. During early gonadal development (154–334 days post-fertilization), the expressions of foxl2 and cyp19a1 increased linearly, while expressions of dmrt1 and sox9 were extremely suppressed, and E2 level was higher, while T level was lower. During the mid-to-late period of triploid female gonadal development (574–964 days post-fertilization), the expressions of dmrt1 and sox9 remained high and were very close to the quantity of diploid male genes, and T levels were even reaching diploid male plasma concentrations, while expressions of cyp19a1 and foxl2 were decreased, leading to decrease in E2 level. We realized that the development model of rainbow trout triploid female gonads was extremely rare, and the regulatory mechanism was very special. Genes involved in gonadal development and endogenous estrogens are pivotal factors in fish natural sex reversal. |
| Starting Page | 193 |
| Ending Page | 202 |
| Page Count | 10 |
| File Format | |
| ISSN | 09201742 |
| Journal | Fish Physiology and Biochemistry |
| Volume Number | 42 |
| Issue Number | 1 |
| e-ISSN | 15735168 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-09-15 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Rainbow trout Sex reversal Triploid Sex steroid Gene expression Freshwater & Marine Ecology Animal Physiology Animal Anatomy / Morphology / Histology Animal Biochemistry Zoology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Medicine Biochemistry Aquatic Science |
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