Self-incompatibility is a fundamental mechanism to prevent inbreeding. In this process, interaction between pollen and pistil is required for recognizing self or nonself [114]. In Brassica plants, S-locus cysteine-rich (SCR) protein was identified as a determinant for pollen side in self-incompatibility [115].

What is a benefit of self-incompatibility?

Self-incompatibility helps in preventing self-pollination. It favours cross-pollination. Self-pollination leads to inbreeding depression.

What is the basis of self-incompatibility?

Self-incompatibility (SI) refers to all genetic mechanisms in flowering plants that prevent self-fertilization through the recognition and rejection of self-pollen by the style of a flower (DeNettancourt, 1977). SI is generally classified into two types: heteromorphic and homomorphic SI.