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Sexual Incompatibility Factors and Somatic Recombination in SCHIZOPHYLLUM COMMUNE
1Department of Botany, Michigan State University, East Lansing, Michigan 48824.
Genetics
|March 1, 1977
Summary
Recombination in S. commune primarily occurs through mitotic events, not meiotic ones. However, compatible mating-type factors can induce both dikaryosis and meiotic-like recombination.
Area of Science:
- Mycology
- Genetics
- Cell Biology
Background:
- Understanding genetic recombination mechanisms in fungi is crucial for evolutionary and developmental studies.
- Schizophyllum commune serves as a model organism for investigating fungal genetics and mating systems.
Purpose of the Study:
- To investigate the mechanisms of sectoring in diploid cultures of S. commune.
- To differentiate between mitotic and meiotic-like recombination events.
- To explore the role of mating-type factors in dikaryosis and recombination.
Main Methods:
- Observation of diploid cultures of S. commune for sectoring.
- Isolation and genetic analysis of sectors for aneuploidy and crossing over.
- Comparison of recombination patterns in compatible and common-AB isogenic diploids.
Main Results:
- Recombination in both common-AB and compatible diploids was predominantly mitotic.
- Compatible diploids with a high frequency of dikaryotic cells showed evidence of meiotic-like activity.
- Compatible mating-type factors are necessary but not sufficient for dikaryosis.
Conclusions:
- Dikaryosis and meiotic-like recombination are tandem phenomena induced by compatible mating-type factors.
- These processes are not causally linked but are co-induced.
- Mating-type factors regulate distinct genes controlling dikaryosis and meiotic-like recombination.
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