Orri seems to be the product of an induced mutation in the Orah mandarin, very popular in China and I believe it was improved in Israel. Gamma ray irradiation is a common technique to cause seed reduction. Genetic analysis mentions that the pollen parent may be the Kinnow mandarin, which in turn is a cross between King x Willow left mandarin. That's as far as I go. It seems that Orah is not apomictic, characteristic of King and his children (some are 60% zygotic). In another genetic study of mandarins, Orah, Wilking and King are placed on the same branch of the cladogram. This reflects that the sequence analyzed is the same. It may be that this character has been inherited or that it reflects that they are all daughters and granddaughters of King. Keep in mind that: King x Willow left mandarin gave several useful crosses today: Encore, Kinnow, Wilking, and I don't remember if there are any more.