Fig. 8

Diagram of ovarian steroidogenic pathway adapted from KEGG. Genes related to the Gth/Gthr system and steroid hormone biosynthesis are indicated. Genes identified by molecular cloning in the Japanese sardine are shown in red boxes. Their expression profiles were confirmed by quantitative PCR. Genes that were upregulated or whose expression did not change during ovarian development (vitellogenesis) are marked with red and blue arrows, respectively (top right of gene names). The localization of each gene and the steroidogenic pathways in ovarian follicles are still not clarified in the sardine