花柱异长即不同植株的雌蕊花柱差别明显,有长花柱花和短花柱花,是栽培养麦固有的特性。通常荞麦群体中长花柱植株和短花柱植株的出现频率相同。花柱异长,能促进异花授粉和在群体中保持一定水平的异质结合性。但是,在昆虫授粉很少或者完全没有的地方,以及在对授粉不利的年份,这种特性会降低产量。 Different length of the pistil different pistils of different plants, there are obvious differences, there are long style flower and short style flower, is the inherent characteristics of cultivated wheat. Usually buckwheat population in the long-style plants and short styles of plants appear the same frequency. Different length of the style, can promote cross-pollination and in the population to maintain a certain level of heterogeneous binding. However, where insects pollinate little or no, and in detrimental years of pollination, this trait can reduce yield.