WGD	whole genome duplication
TGF-β	transforming growth factor β
BMP	bone morphogenetic proteins
GDF	growth and differentiation factor
1R	first round of genome duplication
2R	second round of genome duplication
3R	third round of genome duplication
4R	fourth round of genome duplication
SMAD	composite name from Sma (Caenorhabditis elegans) and Mad (Drosophila melanogaster)
R-SMAD	receptor-regulated smad
Co-SMAD	common smad
I-SMAD	inhibitory smad
ALK	activating receptor-like kinase
Gsdf	gonadal soma-derived factor
Amh	anti-Müllerian hormone
RNA-seq	RNA sequencing
SRA	Sequence Read Archive
FPKM	fragments per kilobase of exon per million fragments mapped
ISH	in situ hybridization
qPCR	quantitative real time polymerase chain reaction
RT-PCR	reverse transcription PCR