Resistance to Recombinant Stem Rust Race TPPKC in WheatJune 3, 2011
Wheat stem rust has re-emerged as a serious threat to production since the discovery of Ug99 in 1950s. Thus, the gene (SrWld1) in wheat that confers resistance to all North American stem rust races is very important, especially in hard red spring (HRS) wheat cultivars. A sexually recombined race of stem rust with virulence to SrWld1 was discovered in 1980s. This led D. L. Klindworth, a scientist from USDA-ARS, and colleagues, to determine the genetics of resistance to the race.
The recombinant race was tested with the set of stem rust differentials and a set of wheat cultivars composed of 36 HRS and 6 durum. Through the use of aneuploid analysis, molecular markers, and allelism tests, the location of the chromosomes were identified. Differential tests labeled the race as TPPKC, which indicates that it is different from TPMKC by having virulence to genes Sr30 and SrWld1. Seven genes in wheat were found to be effective against TPPKC. Further tests indicated that five HRS and one durum cultivar were susceptible to TPPKC, all of which had SrWld1 as their major stem rust resistance gene.
The researchers concluded that TPPKC will not pose a great threat similar to TTKSK but may cause loss of some cultivars if TPPKC infests the fields.
Read the original paper at http://www.springerlink.com/content/h7364l1672313k61/.
The Crop Biotech Update is a weekly newsletter of ISAAA, a non-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural 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
- Renewed Investments and Enabling Policies for Poverty Reduction
- Impacts of GE Crops on Biodiversity
- Oxfam: Avert Global Food Crisis
- Nigeria Passes Biosafety Bill
- African Researchers and Farmers Begin Effort to Reduce Crop Loss from Striga
- SACAU Adopts GMO Policy Framework
- Plant Breeders to Use Genomic Selection to Improve Crops in Developing Countries
- Researchers Discover Key for Identifying Gender in Date Palm Trees
- Climate Change Allows Invasive Weed to Outcompete Local Species
- Bioengineers Design Faster and Less Expensive Chip Producing DNA
- Bill to Accelerate Biotech Approvals in U.S.
- Hard White Winter Wheat Registered for Planting in Ontario, Canada
- Australian Farmers Part of the Global Food Security Solution
- FSANZ Response to Study Linking Cry1Ab Protein in Blood to GM Foods
- FSANZ Calls for Comment on Horticulture Paper
- Managing Biotechnologies for Resource Poor Farmers
- Species Extinction in Plants
- Roadblock to Nutrient Selection and Harmful Microorganisms in Plant Roots
- Europe Should Change Agricultural Policies, Says IIED
- Scientists Track the Fate of Cry1Ab protein in Agricultural Chain
- Insect Resistance Transgenes Reduce Herbivory and Enhance Fecundity in Rice
- Resistance to Recombinant Stem Rust Race TPPKC in Wheat
Beyond Crop Biotech
- How Can Research on Plants Contribute to Promoting Human Health
- Blueberry Effects on Cholesterol Examined in Lab Animal Study
- Bioengineered Blood Vessels Are State-of-the-Artery
- CIALCA International Conference in Rwanda
- Biotech World Congress in Dubai
- ISAAA Now on Facebook and Twitter
- Updated Pocket Ks on Insect Resistance and Herbicide Tolerance Technologies
- Growing Better Rice for a Hungry World
- Economics of GM Crop Cultivation
Subscribe to CBU: