It helps to promote cross-pollination and is often combined with self-incompatibility.这种现象在许多特化的虫媒花中较常见，尤其是通过蜜蜂传粉的花。
Laws of Change Entropy in the Population Pollinating by Means of both Self-Pollination and Cross-Pollination and the Evo基于自交率的基因型信息熵变规律与自花传粉机制的进化意义