Fruits from the Mandarin family are popular throughout the world. In Japan, the shiikuwasha and the tachibana are two culturally important varieties, yet the history of these and other mandarin fruits has been a long-standing mystery.  Now, researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) have analyzed 69 genomes of the east Asian mandarins. The experts compared the east Asian varieties to those in mainland Asia, revealing an interesting history.  Wild mandarin diversity originated in southern China, and most domestic varieties have their...