Abstract:
Puce seeds were subjected to two sets of combination treatments of
radiations and NMH. The effects of mutagenic treatments in the MI and M2
generations were recorded and discussed. Mutation frequencies estimated as
number of mutations per 100 M, ears were not higher than the values expected
on the basis of additive effects. When estimated as number of mutants per
]00 M plants, the frequencies revealed more than additive effects. The
synergistic effect on mutant frequencies was due to increase in the segregation
ratio of mutants. This effect was more pronounced at the higher dose combinations
of fast neutrons and NMH.
