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Asynchronous spore germination in isogenic natural isolates of Saccharomyces paradoxus

Stelkens, RB; Miller, EL; Greig, D; (2016) Asynchronous spore germination in isogenic natural isolates of Saccharomyces paradoxus. FEMS Yeast Research , 16 (3) , Article fow012. 10.1093/femsyr/fow012. Green open access

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Abstract

Spores from wild yeast isolates often show great variation in the size of colonies they produce, for largely unknown reasons. Here we measure the colonies produced from single spores from six different wild Saccharomyces paradoxus strains. We found remarkable variation in spore colony sizes, even among spores that were genetically identical. Different strains had different amounts of variation in spore colony sizes, and variation was not affected by the number of preceding meioses, or by spore maturation time. We used time-lapse photography to show that wild strains also have high variation in spore germination timing, providing a likely mechanism for the variation in spore colony sizes. When some spores from a laboratory strain make small colonies, or no colonies, it usually indicates a genetic or meiotic fault. Here, we demonstrate that in wild strains spore colony size variation is normal. We discuss and assess potential adaptive and non-adaptive explanations for this variation.

Type: Article
Title: Asynchronous spore germination in isogenic natural isolates of Saccharomyces paradoxus
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/femsyr/fow012
Publisher version: http://dx.doi.org/10.1093/femsyr/fow012
Language: English
Additional information: Copyright © FEMS 2016. All rights reserved. This is a pre-copyedited, author-produced PDF of an article accepted for publication in FEMS Yeast Research following peer review. The version of record [Stelkens, RB; Miller, EL; Greig, D; (2016) Asynchronous spore germination in isogenic natural isolates of Saccharomyces paradoxus. FEMS Yeast Research , 16 (3) 10.1093/femsyr/fow012] is available online at: http://dx.doi.org/10.1093/femsyr/fow012
Keywords: Saccharomyces paradoxus, bet hedging, colony size, germination asynchrony
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/1500870
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