Jonathan Gold's 101 Best Restaurants: The new list is here

International Citrus Corporation

Tracking down the parents of sweet orange

Tracking down the parents of sweet orange

Valencia, Spain – Detailing the ancestry of sweet orange has been a long-sought prize for citrus scientists. On Friday, the leader of a group that has been analyzing the genetic makeup of citrus said in a scientific talk that the ponkan -- a large, loose-skinned type of mandarin widely cultivated in Asia and Brazil -- was the likely father of the sweet orange.

The mother of the orange, its seed parent, was almost certainly a hybrid that was three-quarters pummelo and one-quarter mandarin, said Fred Gmitter Jr., professor of citrus genetics at the University of Florida, speaking at the...