In situ expression of the GmNMH7 gene is photoperiod-dependent in a unique soybean (Glycine max [L.] Merr.) flowering reversion system - Cunxiang Wu; Qibin Ma; Kwan-Mei Yam; Ming-Yan Cheung; Yunyuan Xu; Tianfu Han; Hon-Ming Lam; Kang Chong (Planta, 2006)