PCR-RFLPs for detection of each of mutant H and Se alleles. Profiles of PCR-RFLPs for detection of h1 (A), h2 (B), h3 (C), h4 (D), and h5 (E and F) alleles in H gene, and profiles of PCR-RFLPs for genotyping of Se gene (G and H) are presented. Initials of each individual are at the top. M, marker.