EMS- and radiation-induced mutation frequencies at individual loci in Arabidopsis thaliana (L.) Heynh.

Average mutation frequencies per locus per dose of mutagen - EMS, X-rays and fast neutrons - were estimated from 15 different loci of Arabidopsis thaliana. These loci relate to clearly distinguishable phenotypic mutant groups, each affected by a limited number of loci. There were significant differences in mutation rate between individual loci. The proposition of a linear relationship between DNA content and mutation frequency per locus is rejected.