Jodi's research work while still at the Gemmell has produced another article published in PeerJ. It describes and correlates qPCR expression data of 4 candidate genes (gonadal and brain aromatase, anti-müllerian hormone and isotocin) in brain and gonadal tissues, and comparing those among the iconic tropical bluehead wrasse (Thalassoma bifasciatum) and the temperate spotty (Notolabrus celidotus) and kyusen (Parajulus poecilepterus) wrasses.
This collaborative work among members of the Gemmell lab, the Godwin Lab and Dr. n all three species, gonadal aromatase and amh were downregulated and upregulated, respectively, at the initiation of gonadal sex change, and may act concurrently to orchestrate ovary-testis transformation. In the brain, brain aromatase does not seem to be initiating behavioural sex change, as its expression trailed behavioural changes. Isotocin expression correlated with dominant male-specific behaviours in the bluehead wrasse, but was not sex-biased in spotty and kyusen wrasses, suggesting that gonadal sex change is phylogenetically conserved among wrasses, but that neural pathways governing behavioural sex change may be more variable.