Breedenn.布里登breedv.繁殖；养育；引起，产生；教养n.品种；血统breeding unsoundness繁殖缺陷breeding specialties养殖类breeding objiectives育种现状Breed identification品种识别breeding utilization育种利用Breeding the rabbits养兔breeding by crossing杂交育种法breed improved seeds培养优良品种breeding alternative交替育种breeding disturbance繁育障碍