Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Seed dormancy may hold the key to fighting weeds

02.07.2003


Researchers are studying rice genes as a model to understand germination

Weeds flourish in agricultural, urban, and natural settings because they have certain characteristics, such as seed dormancy, that provide for their persistence. Dormant weed seeds in the soil avoid exposure to control practices that target emerging weed seedlings.

Scientists from the USDA-Agricultural Research Service and North Dakota State University, Fargo, ND, are focusing their research on understanding seed dormancy in wild oat, a serious weed worldwide. Since the wild oat genome is too large to perform map-base cloning of the dormancy and germination genes, these researchers investigated rice, with its small genome and many genetic resources, as a model system to identify and clone seed dormancy genes from grasses.



These researchers investigated the inheritance of seed dormancy in weedy strains of rice. As a first step, researchers cross-pollinated dormant weedy strains of rice with non-dormant domesticated strains to develop populations segregating for dormancy. Then they determined some classical genetic attributes, such as heritability associated with several populations segregating for dormancy.

"Our initial research demonstrated that weedy rice provides ideal gene resources to elucidate mechanisms of dormancy and to improve resistance to preharvest sprouting," said Dr. Xing-You Gu, a rice geneticist from China who collaborated on the project. Dr. Zong-Xiang Chen at Yangzhou University in China co-authored the study.

The study of the inheritance of seed dormancy in weedy rice was presented at the 7th International Workshop on Seeds in Salamanca, Spain in May 2002 and is published in the May-June issue of Crop Science.

Based on these initial investigations, the team developed a USDA-National Research Initiative competitive grant to further develop one of the populations with the goal of map-based cloning genes to regulate hull-imposed dormancy. The proposal was funded for three years beginning in July 2003.

Ultimately, Foley says he would like to see many seed dormancy genes cloned from rice so they can be used as probes to find similar genes in wild oat and crops like wheat and barley that are susceptible to preharvest sprouting.



Crop Science Journal, http://crop.scijournals.org published by the Crop Science Society of America is a peer-reviewed, international journal publishing original research in crop breeding, genetics, and cytology; crop physiology and metabolism; crop ecology, production, and management; seed physiology, production, and technology; turfgrass science; crop ecology, management, and quality; genomics, molecular genetics, and biotechnology; plant genetics resources; and pest management.

The American Society of Agronomy (ASA) http://www.agronomy.org, the Crop Science Society of America (CSSA) www.crops.org and the Soil Science Society of America (SSSA) http://www.soils.org are educational organizations helping their 10,000+ members advance the disciplines and practices of agronomy, crop and soil sciences by supporting professional growth and science policy initiatives, and by providing quality, research-based publications and a variety of member services.

Sara Uttech | EurekAlert!
Further information:
http://www.asa-cssa-sssa.org/
http://crop.scijournals.org
http://www.agronomy.org,

More articles from Agricultural and Forestry Science:

nachricht Researchers discover natural product that could lead to new class of commercial herbicide
16.07.2018 | UCLA Samueli School of Engineering

nachricht Advance warning system via cell phone app: Avoiding extreme weather damage in agriculture
12.07.2018 | Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>