A collaborative study we have identified the molecular basis of SO₂ production in yeast in wine to reduce SO₂ production through the innovative QTL process.
The QTL process involves identifying genes for the desired trait (non-production of SO₂, acetaldehyde and H₂S) and naturally transferring it to another yeast chosen for its fermentation performance and other oenological qualities. Transferring the genes involved repeated crosses (backcrossing) between the low-SO₂ yeast and the target yeast.
This is a non-GMO technique that can occur naturally in yeast. With this method, we obtained a yeast that produces very low to no concentrations of SO₂, H₂S and acetaldehyde.