grains per spike的用法和样例：
例句
- In conclusion, more spikelets and kernels per spike were the most valuable traits in turgidum landraces, and could be utilized in wheat breeding.
本研究认为，多小穗数和多穗粒数是圆锥小麦地方品种最突出的优良性状，可做为小麦育种的重要基因资源。 - There is a significantly linear relation between secondary branch grain number and grain number per panicle, and they have the same changing tendency.
穗粒数与二次枝梗粒数随品种的变化是一致的，二者有极显著的线性相关。
