Navigation Links
ARS scientists identify genetic resistance to rice sheath blight
Date:5/4/2010

This release is available in Spanish.

Agricultural Research Service (ARS) scientists have identified sources of genetic resistance to sheath blight, a major disease affecting rice production worldwide.

Sheath blight, caused by the fungus Rhizoctonia solani, is a major disease of rice that affects yield and grain quality. Geneticist Anna McClung, director of the ARS Dale Bumpers National Rice Research Center in Stuttgart, Ark., and research leader of the Rice Research Unit in Beaumont, Texas, heads a group of ARS scientists examining the rice genome in search of genetic resistance to this serious disease.

Plant pathologist Yulin Jia and colleagues at Stuttgart had a breakthrough in their sheath blight mapping efforts when they identified and confirmed qShB9-2, the first genetic region they have found to have a major effect on controlling the disease.

In a related project, geneticist Georgia Eizenga at Stuttgart screened 73 wild rice species for signs of sheath blight resistance. Seven accessions showed promise, and Eizenga's team has crossed some of those accessions with domestic varieties to create new, resistant germplasm.

The Stuttgart scientists have also developed a standardized screening technique to help quickly and accurately detect sheath blight in seedlings. Called the "microchamber method," this technique uses 2-liter or 3-liter plastic bottles to create a humidity chamber to promote disease development. This allows the researchers to measure seedlings' disease reaction in just seven days, accelerating the process of identifying novel, resistant sources from cultivated and wild relatives of rice.

Meanwhile, in Beaumont, geneticist Shannon Pinson has been studying gene-mapping populations from recombinant inbred lines (RILs) of domestic rice cultivar "Lemont" and Chinese cultivar "TeQing." She found 18 chromosomal regions in these RILs with genes that can help rice plants resist damage from sheath blight, including the qShB9-2 genetic region confirmed by Jia. Two of the regions have shown a large, measurable effect on sheath blight resistance.

The scientists' studies can be found in Plant Disease, Molecular Genetics and Genomics, Frontiers of Agriculture in China, Theoretical Applied Genetics, Crop Science, Phytopathology and the Journal of Plant Registrations.


'/>"/>

Contact: Stephanie Yao
Stephanie.Yao@ars.usda.gov
301-504-1619
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/1/2016)... -- Wocket® smart wallet ( www.wocketwallet.com ) announces the launch of a new ... Las Vegas , where Joey appeared at the ... Las Vegas , where Joey appeared at the Wocket booth to ... was filmed at the Consumer Electronics Show (CES2016) in Las ... and greet fans. --> --> ...
(Date:1/25/2016)... 2016   Unisys Corporation (NYSE: UIS ) today ... (JFK) International Airport, New York City , to ... attempting to enter the United States using ... pilot testing of the system at Dulles last year. ... JFK during January 2016. --> pilot testing of ...
(Date:1/22/2016)... Jan. 22, 2016 ... of the "Global Biometrics Market in ... offering. --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ) ... "Global Biometrics Market in Retail Sector 2016-2020" ... --> Research and Markets ( http://www.researchandmarkets.com/research/p74whf/global_biometrics ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... (PRWEB) , ... February 04, ... ... conference presented by Bloomsburg University’s Digital Forensics Club, takes place February 5-6 ... two-day event features 20+ speakers and activities such as workshops and competitions ...
(Date:2/4/2016)... JUNCTION, N.J. , Feb. 4, 2016 /PRNewswire/ ... care immunotherapy leader commercializing its flagship CytoSorb® blood ... cardiac surgery patients around the world, announced that ... will present at the Source Capital Group,s 2016 ... and update on the company.  ...
(Date:2/4/2016)... 2016 --> --> ... is pleased to provide the following update on recent corporate ... the last 3 months we have significantly increased our cash ... $1,000,000. As a result, we have positioned ourselves to execute ... agreement and expect that development to continue on schedule. ...
(Date:2/4/2016)... 4, 2016  Spherix Incorporated (Nasdaq: SPEX ) -- an ... monetization of intellectual property, today provided an update on ... Northern District of Texas and ... Inter Partes Re-examination ("IPR") proceedings that VTech ... IPR was initiated on only certain claims of two ...
Breaking Biology Technology: