Map of sampling sites for the three Myxocyprinus asiaticus broodstocks. Key: black triangle Pixian Base of Sichuan Fisheries Research Institute, China (PBS); black star Yinbin Base of Sichuan Fisheries Research Institute, China (YBS); black square Yibin Rare Aquatic Animal Research Institute, China (YRA); broken circle river range where the wild broodstocks source of YBS; broken rectangle river range where the wild broodstocks source of YRA.