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Australian Herbicide Resistance Initiative (AHRI)

Rare but predictable – A new target-site mutation for glyphosate resistance discovered

Tag Archives | Resistance Mechanisms

Australian Herbicide Resistance Initiative (AHRI)

Rare but predictable – A new target-site mutation for glyphosate resistance discovered

AHRI’s principal research fellow, Dr Qin Yu, in collaboration with other international researchers, has demonstrated that in Tridax daisy, glyphosate resistance is associated with the Thr-102 site mutation alone. In contrast to earlier investigations with goosegrass, where both the Pro-106 and Thr-102 sites (TIPS) mutation endowed glyphosate resistance, this study has demonstrated that selection for a mutation at Thr-102 alone can lead to moderate level glyphosate resistance in the field.

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Heping Han

Australian Herbicide Resistance Initiative (AHRI)

Glyphosate resistance and plant fitness

Things that affect your fitness: Christmas – go on, have one more serving of trifle, it is only wafer thin! Television – for example, spending five full days watching the Boxing Day test match cricket. Each on their own are not too bad, but put them together and we have a problem. Things that affect plant fitness: The TIPS mutation that causes high-level glyphosate resistance. The TIPS mutation is a double mutation of the glyphosate target site, the 102 and the 106 mutation. The 106 mutation has been found in a number of species and has no fitness penalty associated…

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