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 email@example.com
Joanne Finlay | EurekAlert!
Alkaline soil, sensible sensor
03.08.2017 | American Society of Agronomy
New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
23.08.2017 | Life Sciences
23.08.2017 | Life Sciences
23.08.2017 | Physics and Astronomy