Self-Incompatibility-Related RNases in Styles of Japanese Pear (<italic>Pyrus serotina</italic> Rehd.)

Abstract

Isoelectric focusing revealed that S-genotypes of Japanese pear varieties with gametophytic self-incompatibility were correlated with the isoforms of their stylar RNases. In a self-compatible mutant, the S-allele-related band was much less intense than in the original variety. These observations suggest that the RNase isoforms may be the stylar products of S-genes.