The stage controlling seed number per ear during ear differentiation, safe booting date and safe heading date of wheat in Sichuan were discussed.
本文还讨论了四川小麦幼穗分化过程中引致穗粒数变异的时期，以及安全孕穗、抽穗期。
Temperature influenced preharvest sprouting to some extent. The inhibiting substance in seed coat and ear was also discussed.
本文还讨论了颖片、芒中的抑制物质及温度对穗发芽的影响。
The main mutant-types induced by EMS were ear visibles, seed visibles, stem visibles, leaf character mutation, fertility mutation and mature period mutation.
EMS诱变产生的主要突变类型有：穗部形态突变、籽粒形态突变、茎秆形态突变、叶片性状突变、育性突变及熟期突变等。
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