Relative abundance of race 3-enriched genes at four different stages in race 3 compared with that in race 4.

aThe expression level of genes was analyzed with the 2−ΔΔCt method using the GAPDH gene as an internal reference gene for normalization. The calibrator was the transcript level of the corresponding gene in race 4 at the same developmental stage.
bThe relative abundance of the gene indicated was very close to zero.