Figure 8.

No Gene Dosage Effect Is Observed for CesA1 and CesA6.

Hypocotyl lengths of dark-grown prc1-8 seedlings, mutant for CesA6, rsw1-10 seedlings, mutant for CesA1, and the progeny of a plant homozygous for rsw1-10 and heterozygous for prc1-8 were measured. In the segregating population (SP), a discrete 1:3 segregation of the additive phenotype was observed. No gene dosage effect was observed. Indeed, an intermediate hypocotyl length for half of the seedlings, those corresponding to prc1-8 heterozygotes, would be expected if the dosage of the CesA6 gene were critical for hypocotyl growth.