we have studied a number of petite [ rho- ] mutants of saccharomyces cerevisiae induced in a wild-type strain of mitochondrial genotype [ ome- chl ( r ) ery ( s ) oli ( s ) ( 1 , 2 , 3 ) par ( s ) ] by berenil and ethidium bromide , all of which have retained two mitochondrial genetic markers , [ chl ( r ) ] and [ ery ( s ) ] , but have lost all other known markers .
C0017393
genetic markers
C0005516
markers