Figure 7.

Expression profile of hox genes during oogenesis and embryogenesis. A total of 37 hox genes are listed from the assembly data of PLEWA04. The sample abbreviations indicated by the labels at the top of each panel are defined in Table 1. Ovaries were sampled at three and seven months after metamorphosis (Ov3 and Ov7, respectively). Note that P. waltl hoxc1, and hoxd12 orthologs were not identified from our transcriptome data. A hoxb13 ortholog was not confidently identified; the candidate contig (M1173232_PLEWA04) showed low homology compared with other vertebrates (Supplementary Data S5 and S6https://doi.org/10.6084/m9.figshare.7550768.v1). Most of the hox genes were zygotically activated; only the hoxd1 mRNA was synthesized during oogenesis and stored at the one-cell stage. RPKM values of each gene are indicated as a colour gradient on a log₂ scale, ranging from red (maximum) to white (minimum).