African Shadock x Poncirus is highly polyembryonic. I had my first fruits. I pollinated with Chandler and a citrumelo (name dubious but most probably F1). The taste of the fruit was, by the way, not very inviting: bitter, sour, resinous, juicy only when let on the tree for very long a time. Seeds were not fully developed in March. So can only be used as pollen parent. Pollen is abundant and probably good: My Chandler had a lot of seed set with it.