Figure 15.1–Gel zymograms stained for 6-phosphogluconate dehydrogenase in Arceuthobium. Genotypes are given below each lane number. A: Banding patterns from triploid seed endosperms from A. abietinum f. sp. magnificae (No. 1910, lane 1-10) and A. abietinum f. sp. concoloris (No. 1917, lanes 11-14). Note the 1:4:4 or 4:4:1 dosage for heterozygotes. B: Banding patterns for 21 individuals of A. campylopodum (No. 2206) using diploid shoot tissue. Note the 1:2:1 dosage for heterozygotes.