Centre of Origin

In one of my previous post I point out to Mediterranean origin for black radish. Recently I came across a reference from Ian Bancroft book Genetics and Genomics of the Brassicaceae as follows:"There is some controversy as to the probable centre of origin of Raphanus sativa. It most likely originates in the Middle East or West Asiatic region. Other suggestion indicates Asiatic origins with a centre of major diversity in China".