In the other RG replication, progeny were separated into early-setting andlate-setting groups. Twenty-seven early-setters were scored. All showed C.gigas patterns for EST, MDH, and MPI. Gpi likewise showed only C. gigas patterns in the 20 individuals scored, but five of these carried an allele not present in either C. gigasparent Thus early-setting putative hybrid progeny provedtobe C. gigas, presumably hatchery contaminants (Fig. a).