Using phylogenies of pheromone receptor genes in the Microbotryum violaceum species complex to investigate possible speciation by hybridization

  title={Using phylogenies of pheromone receptor genes in the Microbotryum violaceum species complex to investigate possible speciation by hybridization},
  author={Benjamin Devier and Gabriela Aguileta and Michael E. Hood and Tatiana Giraud},
  pages={689 - 696}
Several cases of speciation by hybridization have been reported in fungi, mostly involving recent hybridization between closely related species. In the basidiomycete genus Microbotryum by contrast some species were suspected to have arisen by hybridization between moderately distant species. In particular two species, M. lagerheimii and M. silenes-acaulis, had different placements in phylogenetic trees depending on the genes considered. Microbotryum species exhibit bipolar heterothallism, and… 
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A new term, unipolarity, is introduced to describe the unisexual mode of fungal reproduction that is distinguished from the bipolar and tetrapolar configurations.
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Co‐occurrence and hybridization of anther‐smut pathogens specialized on Dianthus hosts
Investigation of the anther‐smut fungi reveals how variation in the degrees of host specificity can have major implications for ecological interactions and genetic integrity of differentiated pathogen lineages.
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The majority of both sexual and asexual species of red yeasts have functional pheromone receptors and homeodomain homologues, which makes the separation between sexual and the frequent existence of asexual strains within sexual species imprecise.
Gene exchange between two divergent species of the fungal human pathogen, Coccidioides
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Using mating-type gene sequences for improved phylogenetic resolution of Collectotrichum species complexes.
Morphological traits, including hyphopodia size, colony appearance, spore size, appresorial shape and size and host preference, frequently were unreliable as indicators of phylogenetic association and more often were useful for this purpose.
Molecular phylogeny of the plant pathogenic genus Botrytis and the evolution of host specificity.
A classification of the genus Botrytis was constructed based on DNA sequence data of three nuclear protein-coding genes and compared with the traditional classification, finding that loss of sexual reproduction has occurred at least three times and is supposed to be a consequence of negative selection.
Patterns of within population dispersal and mating of the fungus Microbotryum violaceum parasitising the plant Silene latifolia
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  • Biology, Environmental Science
  • 2004
There was a strong deficit in heterozygotes, confirming the high self-fertilisation rates suggested by previous studies, and this indicates that intratetrad matings are frequent, which helps to explain the puzzling maintenance of a sex-ratio distortion in M. violaceum.
The Origin of Multiple Mating Types in the Model Mushrooms Coprinopsis cinerea and Schizophyllum commune
The genome sequence of C. cinerea reveals several clusters of genes of related function, suggesting that gene amplification has contributed to many aspects of the biology of this fungus.
Expressed sequences tags of the anther smut fungus, Microbotryum violaceum, identify mating and pathogenicity genes
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Hybridization as an invasion of the genome.
  • J. Mallet
  • Biology
    Trends in ecology & evolution
  • 2005
Hybrid sterility and inviability in the parasitic fungal species complex Microbotryum
It is shown that F1 hybrid sterility, the inability of gametes to mate, increased gradually with the increasing genetic distance between the parents, and post‐mating barriers remain weak among the closest species pairs, suggesting that premating barriers are sufficient to initiate divergence in this system.