Recombination and biased segregation of mitochondrial genomes during crossing and meiosis of different Schizosaccharomyces pombe strains
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Stephan Kamrad María Rodríguez-López Shoumit Dey Mimoza Hoti Henry Wallace Markus Ralser Jürg BählerAbstract
During meiosis, tethering of parental mitochondria to opposite cell poles inhibits the mixing of mitochondria with different genomes and ensures uniparental inheritance in thestandard laboratory strain of fission yeast. We here investigate mitochondrial inheritance in crosses between natural isolates using tetrad dissection and next-generation sequencing. We find that colonies grown from single spores can sometimes carry a mix of mitochondrial genotypes, that mitochondrial genomes can recombine during meiosis, that in some cases tetrads do not follow the 2:2 segregation pattern, and that certain crosses may feature a weak bias towards one of the parents. Together, these findings paint a more nuanced picture of mitochondrial inheritance in the wild.
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Journal MicroPublication Biology
Volume 2021
Pages 000390
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Publisher website (DOI) 10.17912/micropub.biology.000390
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Europe PubMed Central 34017941
Pubmed 34017941
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