Nuclear Arms Races: Experimental Evolution for Mating Success in the Mushroom-Forming Fungus Schizophyllum commune
- Author: mycolabadmin
- 2018-12-27
- View Source
Summary
This research explored how mushroom fungi evolve to become better at mating through a process similar to sexual selection in animals. The scientists conducted experiments with the mushroom species Schizophyllum commune over multiple generations to see how it would adapt to maximize its mating success. The findings show that fungi can evolve strategies to become more successful at mating, similar to how animals evolve traits to attract mates.
Impacts on everyday life:
– Helps understand how fungi reproduce and evolve, which is important for agriculture and food production
– Provides insights into controlling fungal growth in both beneficial and harmful contexts
– Demonstrates fundamental evolutionary principles that apply across different forms of life
– Could aid in breeding better mushroom strains for cultivation
– Improves our understanding of sexual selection as a universal biological process
Background
Sexual selection favors traits that increase competitive success during mating. While sperm and pollen competition have yielded many adaptations in animals and plants, similar processes have not been directly demonstrated in fungi. In mushroom fungi, mating occurs through nuclear donation to a mycelium, where fertilizing ‘male’ nuclei migrate through the receiving ‘female’ mycelium.
Objective
To test if sexual selection can increase competitive fitness during mating in the mushroom-forming fungus Schizophyllum commune through experimental evolution.
Results
Of the twelve tested evolved lines, four showed increased fitness and one showed decreased fitness relative to the unevolved competitor. Two remained significant after correcting for multiple comparisons. For five lines, there was correlation between female mycelium access efficiency and fitness. Two lines showed increased spore production. The line with reduced competitive fitness had increased spore production but reduced fertilization efficiency. No trade-offs were found between male reproductive success and other fitness components.
Conclusion
Increased mating success was achieved through a combination of increased spore formation and improved efficiency in establishing within the receiving mycelium. Most evolved lines showed no trade-offs with other fitness components. The study demonstrates that sexual selection theory developed for animals and plants can be applied to fungi.
- Published in:PLoS One,
- Study Type:Experimental Evolution Study,
- Source: 10.1371/journal.pone.0209671