Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (1): 33-40.DOI: 10.3969/j.issn.1004-1524.2023.01.04

• Animal Science • Previous Articles     Next Articles

Expression profiles of CHH2 gene in redclaw crayfish Cherax quadricarinatus and its role in ovarian development

CHEN Leran1,2(), ZHENG Jianbo2, JIA Yongyi2, CHI Meili2, LI Fei2, CHENG Shun2, LIU Shili2, LIU Yinuo2, JIANG Wenping2, GU Zhimin1,*()   

  1. 1. Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
    2. Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Freshwater Aquaculture Genetic and Breeding of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou 313001, China
  • Received:2022-04-06 Online:2023-01-25 Published:2023-02-21

Abstract:

To study the role of crustacean hyperglycemic hormone gene (CHH) in the ovarian development of Cherax quadricarinatus, sequence of CHH2 gene was identified based on transcriptomic data, and the basic characteristics were analyzed by bioinformatic. qRT-PCR was used to detect the expression level of CHH2 in different tissues and ovarian development stages. The results showed that CHH proteins were highly conserved among crustacean species, and they had high homologies with 66.84%. The tissue distribution at transcriptional level displayed that CHH2 was hardly to be detected in hepatopancreas, and was detected at low level in muscle, gills, heart and intestine, while highly expressed in ovary. In addition, CHH2 was expressed in all stages of ovarian development and exhibited an abnormal expression pattern with the lowest expression level at mature stage. On the other hand, CHH2 expression was significantly reduced in ovarian tissues after ESA treatment and E2 injection. Furthermore, VTG was regarded as an important marker for ovarian development, VTG-mRNA appeared to be increased through RNAi-induced gene silencing. In conclusion, CHH2 might negatively regulate ovarian development, and this study would provide new insights for further exploring the mechanism of crustacean ovarian development.

Key words: Cherax quadricarinatus, crustacean hyperglycemic hormone 2 (CHH2), RNAi, expression profile, ovarian development

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