Given the significant impact of grain number (GN) on wheat grain yield, it is critical to gain a deeper understanding of the physiological bases of GN determination. The formation of both spike number (SN) and grains per spike (GS) coincides temporally and undergoes a parallel process characterized by the extensive generation of structures (such as tillers or floret primordia), succeeded by substantial degeneration, ultimately leading to a limited number of viable spike-bearing tillers and fertile florets at anthesis. Survival highly depends on resource availability and the existing genetic variability may result in varied SN and GS response to inputs or environmental conditions.

中文翻译：

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穗状肥力可塑性的小麦品种的分蘖和小花发育动态


鉴于粒数 （GN） 对小麦籽粒产量的重大影响，更深入地了解 GN 测定的生理基础至关重要。穗数 （SN） 和每穗粒数 （GS） 的形成在时间上是一致的，并经历一个平行的过程，其特征是结构的广泛产生（如分蘖或小花原基），随后是实质性退化，最终导致有限数量的活穗带分蘖和开花时可育的小花。存活率在很大程度上取决于资源可用性，现有的遗传变异可能导致 SN 和 GS 对输入或环境条件的反应不同。