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Mitonuclear interactions may contribute to fitness of fungal hybrids.

ABSTRACT: Hybridization between species is being recognized as a major force in the rapid adaptive evolution of fungal plant pathogens. The first stages of interspecific hybridization necessarily involve nuclear-mitochondrial chimeras. In their 2001 publication, Olson and Stenlid reported that mitochondria control the virulence of first generation hybrids between the North American fungal pathogen Heterobasidion irregulare and its congeneric H. occidentale. By assessing saprobic ability and gene expression of H. irregulare × H. annosum sensu stricto hybrids and of their parental genotypes, we demonstrate that mitochondria also influence saprobic growth of hybrids. Moreover, gene expression data suggest that fungal fitness is modulated by an intimate interplay between nuclear genes and mitochondrial type, and is dependent on the specific mitonuclear combination.

SUBMITTER: Giordano L

PROVIDER: S-EPMC5786003 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Mitonuclear interactions may contribute to fitness of fungal hybrids.

Giordano Luana L Sillo Fabiano F Garbelotto Matteo M Gonthier Paolo P

Scientific reports 20180126 1

Hybridization between species is being recognized as a major force in the rapid adaptive evolution of fungal plant pathogens. The first stages of interspecific hybridization necessarily involve nuclear-mitochondrial chimeras. In their 2001 publication, Olson and Stenlid reported that mitochondria control the virulence of first generation hybrids between the North American fungal pathogen Heterobasidion irregulare and its congeneric H. occidentale. By assessing saprobic ability and gene expressio ...[more]

PMID: 29374209

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