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Yeast's lifestyle couples mating with meiosis
Date:1/5/2014

myces pombe. But S. pombe and C. lusitaniae are very distant relatives. Their evolution diverged at least 330 million years ago.

That two such distantly related haploid yeasts should each have evolved a fused program of mating and meiosis makes it seem more likely that there is some generally good reason for doing so, Bennett said. His hypothesis is that coupling of mating and meiosis offers the yeasts an advantage in maintaining their haploid lifestyle by efficiently splitting up the diploid products of mating.

In general, fungi have proven ready to adapt their sexual habits based on their environment, Bennett said. Furthermore, across biology there is an emerging picture that genes involved in sexual reproduction are evolving faster than non-sex genes. But the question of why fungi should prefer a life of haploidy, diploidy, or polyploidy rages as hotly as ever among biologists.


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Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert  

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Yeast's lifestyle couples mating with meiosis
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