Japanese pear-quince hybrid (PQ-5) from Isao Shimura, Tokyo University of Agriculture and Technology. Received 4/16/84 at Beltsville Quarantine Center. See: I. Shimura, Y. Ito and K. Seike. 1983. Intergeneric hybrid between Japanese pear and quince. [title translated from Japanese] . Journal of the Japanese Society for Horticultural Science. Dec 31, 1983. v. 52 (3) p. 243-249. The (quince) material that Dr. Shimura used is Cydonia. He did this study when he worked here (the former FruitTree Research Station). The crossed individuals were not vigorous, but they were alive until the beginning of 1990s by
grafting them on Japanese pear as rootstock. Dr. Sanada, director of Breeding of our institute, also hybridized Japanese pear and Quince a few years ago. -- letter from Hiroyuki Iketani, Laboratory of Genetic Resources, Department of Breeding, National Institute of Fruit Tree Sciences, Tsukuba, Ibaraki, Japan - 12/2004