Hiroshi Okubo, Arifin Noor Sugiharto, Noriko Miho
Bulbing response of two accessions of shallot and two accessions of A. x wakegi collected in Indonesia and two A. x wakegi accessions in Japan to daylength and temperature was investigated. All accessions formed bulbs under a 16-hr photoperiod. Both species also formed bulbs under a 12-hr daylength; A. x wakegi formed bulbs even in an 8-hr daylength. Temperature of 20 °C more promoted bulbing in both species than at 25 and 30 °C.
Laboratory of Horticultural Science, Faculty of Agriculture, Kyushu University 46-01, Fukuoka 812-8581, Japan; Department of Plant Breeding, Faculty of Agriculture, Brawijaya University, Malang, Indonesia
