UC Davis scientists deliver genetic blow to wheat disease

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article


A new gene that will equip wheat plants to resist the deadly stem rust disease has been discovered by an international team that includes plant scientists at the University of California, Davis.

The study findings on the Sr33 gene appear as the cover article of the Aug. 16 issue of the journal Science’s special issue devoted to “Smarter Pest Control.” This article is a companion piece to an article — also co-authored by UC Davis scientists — that reports the findings of another resistance gene, Sr35, which also confers immunity to wheat stem rust disease.

The research team, which included co-author Jan Dvorak, a professor and wheat geneticist at UC Davis, succeeded in cloning the Sr33 gene, known to exist in Aegilops tauschii, a wild relative of common bread wheat.

“We are hopeful that the Sr33 gene and the Sr35 gene, which our colleagues at UC Davis helped to isolate, can be ‘pyramided,’ or combined, to develop wheat varieties with robust and lasting resistance to wheat stem rust disease,” Dvorak said.

The discovery of genes that confer resistance to wheat stem rust disease is vitally important for global food security, as a new, highly aggressive race of the fungus that causes wheat stem rust appeared about a decade ago in Africa and has been spreading from there. That new UG99 race, which causes rust-colored bumps to form on the stems and leaves of the wheat plants, threatens global wheat grain production.

Identification and cloning of resistance genes is expected to enable plant breeders to use traditional breeding techniques to develop new wheat varieties that will be resistant to the new strain of wheat stem rust disease, before it grows into a global pandemic.

Lead author on this study was Evans Lagudah of the Commonwealth Scientific and Industrial Research Organization of Australia. Other researchers were: Karin Deal and Mingcheng Luo of UC Davis; Sambasiyam Periyannan, John Moore, Michael Ayliffe, Rohit Mago and Peter Dodds, all of CSIRO in Australia; Urmil Bansal, Harbans Bariana and Robert McIntosh, all of the University of Sydney, Australia; Xiaojing Wang and Li Huang of Montana State University; and Xiuying Kong of the Chinese Academy of Agricultural Sciences, Beijing, China.

Funding for the Sr33 study was provided by the National Science Foundation’s Plant Genome Research Program and Basic Research to Enable Agricultural Development Program, and the U.S. Department of Agriculture.

The articles about the Sr33 gene and the Sr35 gene also appeared together online in the June 27 edition of Science Express.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Field Profit Planner Dashboard

With GEOSYS Field Profit Planner, you can plan for the future using information from previous years. Agronomic decisions made during ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form