Evolution of the Mating-Type Chromosome in Neurospora tetrasperma
Author Information
Author(s): Menkis Audrius, Jacobson David J., Gustafsson Tim, Johannesson Hanna
Primary Institution: Swedish University of Agricultural Sciences
Hypothesis
The evolution of the mating-type chromosome in Neurospora tetrasperma involved two successive events of recombination suppression.
Conclusion
The study reveals that the mating-type chromosome in Neurospora tetrasperma has a large non-recombining region that evolved through two distinct evolutionary events.
Supporting Evidence
- The non-recombining region covers almost 7 Mbp, over 75% of the chromosome.
- The first event of recombination suppression was contemporaneous with the split of N. tetrasperma from N. crassa.
- The study identified two evolutionary strata in the mating-type chromosome.
Takeaway
This study shows that the mating-type chromosome in a type of fungus has parts that don't mix genes like other chromosomes do, and this happened in two steps over time.
Methodology
The study combined gene divergence data, classical genetics, and phylogenetics to analyze the mating-type chromosome.
Statistical Information
P-Value
p<0.0015
Statistical Significance
p<0.0015
Digital Object Identifier (DOI)
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