Selfing of self-incompatible cocoa

Abstract

THE Upper Amazon cocoa varieties, of great importance to the breeder, are all self-incompatible so that it is difficult to obtain valuable alleles in the homozygous condition1. The incompatibility mechanism operates through failure of fusion of male and female gametes carrying the same dominant allele, followed by the loss of the whole ovary even though normal fusion has occurred in other ovules. © 1960 Nature Publishing Group.