New Slow-Rusting Leaf Rust and Stripe Rust Resistance Genes in Wheat are Closely Linked
October 29, 2010| |
It has been believed that the common wheat genotype ‘RL6077', which is similar to ‘Thatcher' carries the Lr34/Yr18 gene which gives slow resting adult plant resistance (APR) to leaf rust and stripe rust. However, after using diagnostic marker of the gene in the complete gene sequence of RL6077, it was discovered that the gene is absent.
Sybil A. Herrera-Foessel of the International Maize and Wheat Improvement Center (CIMMYT) together with other scientists crossed RL6077 with the susceptible wheat parent ‘Avocet' and developed populations from photoperiod-sensitive lines that are segregating for resistance to leaf rust and stripe rust. The lines were grown in different locations and were evaluated for resistance to leaf and stripe rust. Results showed that there is a correlation in the responses of the rusts, implying that the same gene or closely related genes could give resistance to the two diseases. Through molecular mapping, five markers were identified on chromosome 4DL .
In a parallel study in Canada which used Thatcher crossed with RL6077, the same gene (Lr67) that confers resistance was found in the same chromosomal region. The gene that gave resistance to the rusts in this study was designated as Yr46. The researchers conclude that Lr67/Yr46 can be used together with other slow-resting genes to come up with intense APR to leaf rust and stripe rust in wheat.
Subscribers of the Theoretical and Applied Genetics journal can access the research article at http://www.springerlink.com/content/146857287447624g/.
| |
Biotech Updates is a weekly newsletter of ISAAA, a not-for-profit organization. It is distributed for free to over 22,000 subscribers worldwide to inform them about the key developments in biosciences, especially in biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
-
See more articles:
-
News from Around the World
- FAO's 2nd State of the World's Plant Genetic Resources for Food and Agriculture Report
- We Can Feed the World and Maintain Biodiversity, Scientists Say
- First Three Recipients of Borlaug Medals
- Researchers Promote Biotechnology to Improve Food Security in Africa
- Ministers of Agriculture in Southern LA Countries Issue Statement on Biotech
- Scientists Report Tobacco Bio-oil as Effective Pesticide
- USDA Awards Grants for Specialty Crop Research
- U.S. National Science Foundation Awards New Projects for Plant Genome Research
- USDA Grants $3.8 Million for AgriLife's Turf Improvement Study
- Monsanto Corn Hybrids on Field Trial Exhibit Yield Advantage
- FAO Distributes Huge Quantities of Wheat Seeds in Pakistan
- Bangladesh Experts Identify Biotech to Contribute to Food Security
- Survey Shows What Australians Feel About Biotech
- Syngenta Receives South Korean Import Approval for Agrisure Viptera Trait
- Syngenta Builds Seeds Processing Plant in Java
- Study Reveals Possible Reasons for the Decline of Pollinators
- Global Farmers Share Agribiotech Experience with European Leaders
- EU-JRC Publishes Summary Notification of Field Evaluation of Sugar Beet Event H7-1
-
Research Highlights
- Scientists Report Accumulation of Selenium in Colorado Potato Beetle-resistant Potatoes
- Stress Affects Plant Growth and Development Patterns
- New Slow-Rusting Leaf Rust and Stripe Rust Resistance Genes in Wheat are Closely Linked
-
Announcements
- GM Crops: A New Peer-Reviewed Journal
-
Resources
- Integrated Pest Management for Tomatoes
- FAS-GAIN Report on Taiwan Biotechnology
- AFAA Features Opinion Pieces of GM Technology
-
Read the latest: - Biotech Updates (April 24, 2024)
- Gene Editing Supplement (April 24, 2024)
- Gene Drive Supplement (February 22, 2023)
-
Subscribe to BU: - Share
- Tweet