1·The number of leaf primordia was affected by both genotype and environment, while the Numbers of bracteal, spikelet and floret primordia were affected mainly by environmental factors.
叶原基数由基因型和环境条件共同决定，而苞叶原基、小穗原基和小花原基数以环境因子的影响为主。
2·Temperature within extremely low and high levels, affected spikelet formation, ripening, and final grain yield.
极低、高范围内的温度影响小穗生成、熟和最终籽粒产量。
3·But fertile floret number is directly regulated by hormones after the top spikelet formation.
而顶小穗形成之后，激素直接调节小花的发育。
4·We previously reported that SUPERNUMERARY BRACT (SNB) regulates the transition of spikelet meristems into floral meristems in rice.
我们之前已经报道过SNB(多颖壳)基因，它调控着水稻小穗分生组织向花分生组织的转变。