Ten informational nuclear suppressors of the mitochondrial mutation of are recessive. They are linked to each other, but their allelism is uncertain. Some of them unfavourably affect functions of standard ( ) mitochondrial genomes. One suppressor severely impairs or entirely prevents mitochondrial functions of the spore clones carrying it. The spectrum of mutations on which these suppressors act is similar to that exhibited by In double heterozygotes /NAM3, NAM / the (and ) mutation is suppressed, yet one of our suppressors () and show independent segregation in tetrads. This indicates that there may be absence of complementation between non-allelic suppressors.


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