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 Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

nachricht New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien

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: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>