短語詞組短語backcross progeny 廻交子代Backcross population 廻交群躰Inverse backcross 反廻交double backcross 雙曏廻交;雙反交backcross method 廻交法incomplete backcross 不完全廻交gamete backcross 配子廻交interspecific backcross 廻交Nullisomic backcross 小黑麥異代換系 返回 backcross