Mitochondrial Genetics in a Natural Population of the Plant Pathogen Armillaria

AUTOR(ES)

Smith, M. L.

RESUMO

Transmission and propagation of mitochondrial genotypes in fungi have not been previously investigated in the field. This study examined the distribution of nuclear and mitochondrial genotypes in a natural, local population of the fungal (Basidiomycetes) root-rot pathogen, Armillaria. Six vegetative clones, ranging in size up to 635 m, were identified on the basis of mating-type alleles. Mitochondrial DNA (mtDNA) restriction fragment patterns indicated that each vegetative clone has one, unique mtDNA type. However, as in other basidiomycetous fungi, biparental transmission of mitochondria following laboratory matings of sexually compatible haploid isolates of Armillaria resulted in a uniformly diploid mycelium that was a mosaic for both parental mitochondrial types. Therefore, either matings between monosporous, haploid isolates are uncommon in nature, or when mating does occur, cytoplasmic markers of one partner predominate during subsequent vegetative growth.

Documentos Relacionados

• The Population Genetics of Parthenogenetic Strains of DROSOPHILA MERCATORUM. II. the Capacity for Parthenogenesis in a Natural, Bisexual Population
• Group A Streptococcus: allelic variation, population genetics, and host-pathogen interactions
• Diversity and Evolution of Effector Loci in Natural Populations of the Plant Pathogen Melampsora lini
• The population genetics of Duchenne: natural and artificial selection in Duchenne muscular dystrophy.
• Genetics of Natural Populations. Xxxvii. the Coadapted System of Chromosomal Variants in a Population of DROSOPHILA PSEUDOOBSCURA