å¸ãã¦ã This effect is exacerbated by high rates of nitrogen (N) application in the field. In this study, a dominant rice mutant, lateral florets 1 (lf1), was characterized. The fact that fzp and bd1 mutants continuously produce a branching structure rather than making florets suggests that both genes are required for establishing floret meristem identity. Sasanishiki) was characterized during grain filling. Moreover, approaches to manipulate spikelet development have the potential to increase grain yield. The FZP gene in rice and its maize ortholog, BD1, both act to regulate meristem identity at the transition from spikelet meristem to floret meristem (Chuck et al., 2002; Komatsu et al., 2003). especially under soil-drying conditions. The size of grains is one of major components The molecular mechanisms regulating rice spikelet development still remain largely unclear. ç¤¾å£æ³äººæ¥æ¬åå£è¥æå¦ä¼ Nitrogen accumulation in the apical spikelet of the top primary branch (superior spikelet) and the second spikelet of the lowest secondary branch (inferior spikelet), of the ear on the main stem of rice plant (Oryza sativa L. var. To date, several screening methods have been used, although their reproducibility is sometimes poor due to artifacts mainly caused by varietal differences in heading dates and panicle heights (i.e., the distance from the lamps). To increase yield, rice breeders have traditionally focused on panicle morphology (branch number and length, spikelet density), but have not considered the number of florets in each spikelet. As global warming advances, the instability of rice production will be enhanced owing]. Rice and maize spikelet structures are considered typical determinate spikelets, which generate ï¬xed numbers of ï¬orets; one ï¬oret in the rice panicle and two ï¬orets in the maize tassel (Bommert et al. Spikelet is the primary reproductive structure and a critical determinant of grain yield in rice. The spikelet is an inï¬orescence structure unique to grasses. Heat-induced spikelet sterility is one of the major threats to rice production from global warming. Spikelets are arranged into inflorescences of variable size and form: from small, tight heads in many genera to panicles, the usual form of the inflorescence; panicles as long as one metre or more can be found inâ¦ ), was characterized. spikelet synonyms, spikelet pronunciation, spikelet translation, English dictionary definition of spikelet. Production of rice spikelets with more In this study, we characterized three allelic recessive mutants in rice (Oryza In this study, we identified and characterized a recessive spikelet mutant, namely more floret1 ( mof1 ). The main regulation of sink size in rice occurs between the stage of late differentiation of the panicle and flowering.