hyriopsis cumingii
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Author(s):  
Mingxing Zhu ◽  
Feixiang Su ◽  
Jianghe Leng ◽  
Shaoqing Jian ◽  
Peipei Yi ◽  
...  

2021 ◽  
Vol 118 ◽  
pp. 85-93
Author(s):  
Yayu Wang ◽  
Ya Chen ◽  
Mulian Cao ◽  
Xiaoqiang Wang ◽  
Guiling Wang ◽  
...  

Author(s):  
Jinhua An ◽  
Chengli Wang ◽  
Shaoqing Jian ◽  
Yang Gang ◽  
Chungen Wen ◽  
...  

2021 ◽  
Vol 12 ◽  
Author(s):  
Yayu Wang ◽  
Xiaoqiang Wang ◽  
Jingyuan Ge ◽  
Guiling Wang ◽  
Jiale Li

Transformer-2 (Tra-2) is an upstream regulatory element of the sex regulation mechanism in insects and plays a critical role in sex formation. To understand the role of tra-2 in Hyriopsis cumingii, the full-length Hctra-2 (1867 bp) was obtained from the gonads, and sequence alignment with other species showed that HCTRA-2 protein had a highly conserved RRM domain. Phylogenetic analysis showed that the HCTRA-2 protein was a close relative to of the mollusks TRA-2 protein. The qRT-PCR of tissue-specific expression pattern showed that the Hctra-2 was abundant in gonads, and the expression in testes was higher than that in ovaries (p < 0.01). It suggests that Hctra-2 may play a potential regulatory role in gonadal development of H. cumingii. In the early gonadal development, the Hctra-2 expression was the highest on the third day after fertilization and increased slightly from 4 months to 5 months, which may be related to the embryonic sex determination and early gonadal development. In situ hybridization showed that Hctra-2 mRNA signals were present in both male and female gonads. After silencing Hctra-2 by RNAi, the expression levels of Hcfem-1b and Hcdmrt were changed. It is speculated that there may be a certain relationship between them, which plays an important role in the sex regulation of H. cumingii. Our research will help to deepen our understanding of the shellfish sex determination mechanisms.


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