泛科花粉信号控制十字花科物种间柱头屏障

Yunyun Cao†, Xiaoshuang Cui†, Yinqing Yang† et al. INTRODUCTION: Flowering plants have evolved self-incompatibility to specifically prevent mating with close relatives, thereby enforcing outbreeding and avoiding inbred suppression of species vigor. Meanwhile, self-incompatible plants are often challenged by pollen from other species that are nearby and have similar flowering times. Their capacity to enact interspecific incompatibility to reject interspecific pollen, especially from species within the same family, is crucial for maintaining species integrity. However, agriculturally, reproductive barriers established by interspecific incompatibility restrain distant breeding, a key strategy for increasing genetic diversity, exploiting heterosis, and introducing new traits from wild relatives into crops. Despite its far-reaching evolutionary and agricultural importance, the mechanistic basis of interspecific incompatibility remains poorly understood. …