回交

回交	huí jiāo	backcrossing (i.e. hybridization with parent)
回	Huí	Hui ethnic group (Chinese Muslims)
回	huí	to go back; to return; to turn back; to turn around / to reply; to answer / classifier for literary divisions (acts of a play, sections or chapters of a classic book) / classifier for occurrences or times
回	huí	to curve / to return / to revolve
回	huí	variant of 回
交	jiāo	to hand over; to deliver; to pay (money); to turn over / to make friends / (of lines) to intersect / variant of 跤