Hosted by Sandra Tsing Loh, The Loh Down on Science is a fun way to get your daily dose of science plus a dash of humor in less than two minutes.
Hosted by Sandra Tsing Loh
Airs Weekdays 2:43 and 3:43 a.m.

Original Yeast

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Bread, beer, infections—what’s the common thread?

This is Sandra Tsing Loh with the Loh Down on Science saying, in many cases, it’s yeast.

But where did the FIRST yeast start?

Meet scientists Gianni Liti from the Université Côte d’Azur and Joseph Schacherer from the Université de Strasbourg.

They studied the yeast genome.  A genome is all your personal D-N-A.  It makes you, you.

They collected thousands of yeast samples and examined their D-N-A. They put a special focus on samples from China, due to its wide variety of yeast strains.  They mapped the similarities, differences, and number of TIMES genes were copied between species.

With this information, they built a family tree for yeast.  As of now, all signs point to a single origin – somewhere in China.

This will change methods of how we study microscopic evolution. Studies now only find differences in genes, not the number of copies. New studies will lead to more accurate mapping of evolution!

In fact, the yeast origin story might affect OUR origin story! Perhaps somewhere a hero. . . will rise!