Australian Herbicide Resistance Initiative (AHRI)

Featured paper

This section features the ‘paper of the moment’ we’d encourage you to pay a bit closer attention to!

Our latest published paper is Inheritance of 2,4-D resistance traits in multiple herbicide-resistant Raphanus raphanistrum populations

In this research, Roberto Busi studied the inheritance of 2,4-D resistance in two Raphanus (wild radish) populations in which previous AHRI research had well characterised 2,4-D resistance. In both populations, the 2,4-D resistance was found to be clearly inherited as a single, nuclear (pollen transmitted) dominant or near-dominant gene trait. It is noteworthy that the 2,4-D resistance gene trait is strongly dominant, whereas often single gene resistance is semi-dominant. This clear single gene dominant 2,4-D resistance will aid AHRI researcher Dr Danica Goggin in her work to identify the mechanism of 2,4-D resistance in Raphanus.

 Wild radish in flower

These Raphanus populations are also resistant to ALS herbicides. However, the single gene responsible for ALS resistance inherits completely independent of the single gene endowing 2,4-D resistance.

2,4-D and other auxinic herbicides have been used globally for many decades. So far they continue to be effective in most parts of the world.  However, here in Western Australia, our AHRI geographic resistance surveys conducted by Mechelle Own have revealed widespread 2,4-D resistance (Owen, M.J., Martinez, N.J., Powles, S.B. 2015, Multiple herbicide-resistant wild radish (Raphanus raphanistrum) populations dominate in the Western Australian grain belt.  Crop & Pasture Science, 66, 1079-1085.). 

Auxinic herbicides, specifically dicamba and 2,4-D, will increase in use with the 2017 row crop plantings of transgenic auxinic herbicide resistant crops in the US.

The details of this paper are:

R Busi, S Powles, Inheritance of 2,4-D resistance traits in multiple herbicide-resistant Raphanus raphanistrum populations, Plant Science, 2017, Vol 257 pp 1-8.

To see our catalogue of published papers, click here