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Patterns of mitochondrial inheritance in the myxogastrid Didymium iridis

     Department of Biological Sciences, DePaul University, 2325 North Clifton Avenue, Chicago, Illinois 60614-3207

Jeffery L. Liles

     1000 Locust St., Reno, Nevada 89502

Jason A. Monroe

     Developmental Systems Biology Program, Children's Memorial Hospital, 2300 Children's Plaza M/C 225, Chicago, Illinois 60614

Seven strains of the Central American A1 mating series of Didymium iridis were crossed in all possible combinations. Individual plasmodia were isolated and grown to a stage where total DNA could be isolated for DNA-DNA hybridization with cloned mitochondrial DNA probes to determine the pattern of mitochondrial inheritance. Random, biased, and dominant patterns of uniparental mitochondrial inheritance were observed, as well as rare cases of biparental inheritance, depending on the particular parental strains mated. The diverse patterns suggest that the factors controlling mitochondrial inheritance in D. iridis are complex. Differences between trials of the same matings suggest that non-genetic factors may also influence mitochondrial inheritance.

Key words: biparental inheritance, isogamous mating, mitochondrial transmission genetics, myxomycetes, uniparental inheritance

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				M. A. Scheer and M. E. Silliker Mitochondrial inheritance patterns in Didymium iridis are not influenced by stage of mating competency. Mycologia, January 1, 2006; 98(1): 51 - 56. [Abstract] [Full Text] [PDF]