Identification of an additional vitellogenin gene showing hepatopancreas-specific expression in the kuruma prawn Marsupenaeus japonicus

Genome-Wide Identification of Vitellogenin Gene Family and Comparative Analysis of Their Involvement in Ovarian Maturation in Exopalaemon carinicauda

“…In Dendrobranchiata, Vtg synthesis occurs in both the hepatopancreas and ovaries [45]. As shown in Table 3, the hepatopancreas and ovaries were found to be the principal site of Vtg synthesis in all Penaeidae shrimp species, including L. vannamei, P. japonicus, and Penaeus monodon [28,46,47]; the hepatopancreas was the principal site of Vtg synthesis in most Pleocyemata species. However, other studies have demonstrated that different Vtg isoforms are differentially expressed in the hepatopancreas and ovary, contradicting the past understanding of the Vtg synthesis site.…”

“…Similar to various oviparous vertebrates, multiple Vtg genes are present in single-decapod crustacean species. As Dendrobranchiata species, Fenneropenaeus merguiensis [26] and Litopenaeus vannamei [27] have three Vtg genes and Penaeus japonicus has two Vtg genes [28]. Furthermore, as Pleocyamata species, four Vtg genes were identified in the Procambarus clarkii species [29], and seven Vtg genes were identified from M. rosenbergii [22] and Macrobrachium nipponense.…”

“…Removal of the eyestalk, observed in both Pleocyamata and Dendrobranchiata, has been shown to accelerate ovarian development and elevate the gonadosomatic index [66][67][68]. In the Dendrobranchiata shrimp species P. japonicus, mRNA expression of Vtg1 notably increased in the ovaries while remaining unchanged in the hepatopancreas following eyestalk ablation, whereas Vtg2 expression differed [28]. Bilateral ablation of the eyestalk significantly upregulated the mRNA expression of all Vtgs in the female hepatopancreas of M. rosenbergii but did not affect the expression of Vtgs, except Vtg1 in the ovaries [22].…”