QTL for spikelet number from a high-yielding rice variety, Hoshiaoba, detected in an introgression line with the genetic background of an indica rice variety, IR64 - Koide, Yohei; Fujita, Daisuke; Tagle, Analiza G.; Sasaki, Kazuhiro; Ishimaru, Tsutomu; Fukuta, Yoshimichi; Kobayashi, Nobuya (Springer, 2013)