Sporophytic self-incompatibility controlled by the multiallelic S-locus was one of several mechanisms that evolved to prevent inbreeding in plants.

• 摘要孢子体型自交不亲和性是植物特异性地识别并拒绝自花或亲缘关系很近的花粉的一种遗传机制，该特异性受S基因座控制。