More than 305 types of weed in more than 50 countries have been reported to be resistant to at least one herbicide, and an increasing number of weeds owe their success to their genetic diversity.
Scientists say techniques are needed to detect mutations when they first occur, so farmers can test for herbicide resistance in the field and manage weeds accordingly.
NSW Department of Primary Industries (DPI) molecular biologist,Dr Mui-Keng Tan, together with a team of researchers from Japan, investigated a technique called ecotilling and found it offers a quick, cheap and reliable means of detecting early signs of herbicide resistance in weeds.
Unlike the traditional molecular approach, eco-tilling uses reverse genetics. Genes are not fully sequenced; instead, mutations in single molecules that make up genes are identified purely on the basis of their position in the genome.
Dr Tan said new mutations can be detected and known ones can be screened for a fraction of the cost of alternative genetic methods.
This makes it a powerful, low cost and high throughput alternative to full sequencing.
Dr Tan has been investigating the technique with Dr Guang-Xi Wang from Kyoto University, who was funded by the Grains Research and Development Corporation to collaborate with Dr Tan at DPI’s Elizabeth Macarthur Agricultural Institute at Camden.
She says the use of the eco-tilling technique to test for resistance could help farmers to manage herbicide use in crop rotations more economically and effectively.
Dr Tan’s research has focused on herbicide resistance in two oft he most significant weeds affecting Australian cropping systems -wild oats and rye grass - and to together with Dr Wang she also examined weeds in rice fields inJapan.
Dr Tan said the every weed-herbicide system is specific.
"The ecotilling technique can beapplied on any particular system, pending availability of molecular data on the target genes of theherbicides," she said.
An article on the research in Japan was published recently in the international journal Pesticide Biochemistry and Physiology.Contact Mui-Keng Tan, Camden, (02) 4640 6445 or firstname.lastname@example.org
Joanne Finlay | EurekAlert!
Cereals use chemical defenses in a multifunctional manner against different herbivores
06.12.2018 | Max-Planck-Institut für chemische Ökologie
Can rice filter water from ag fields?
05.12.2018 | American Society of Agronomy
Different eras of civilization are defined by the discovery of new materials, as new materials drive new capabilities. And yet, identifying the best material...
Researchers from the University of Basel have reported a new method that allows the physical state of just a few atoms or molecules within a network to be controlled. It is based on the spontaneous self-organization of molecules into extensive networks with pores about one nanometer in size. In the journal ‘small’, the physicists reported on their investigations, which could be of particular importance for the development of new storage devices.
Around the world, researchers are attempting to shrink data storage devices to achieve as large a storage capacity in as small a space as possible. In almost...
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
19.12.2018 | Materials Sciences
19.12.2018 | Materials Sciences
19.12.2018 | Life Sciences