Featured Research

from universities, journals, and other organizations

Building Disease-beating Wheat

Date:
December 18, 2007
Source:
CSIRO Australia
Summary:
Disease resistance genes from three different grass species have been combined in the world's first "trigenomic" chromosome, which can now be used to breed disease resistant wheat varieties.

The project has the potential to considerably speed up the process of wheat breeding.
Credit: Photo by: Carl Davies, CSIRO

Pioneered by CSIRO researchers, in collaboration with the International Maize and Wheat Improvement Center (CIMMYT) and Sydney University, the research illustrates the major genetic improvements possible without genetic modification (GM) technology.

“Wheat breeders often use wild relatives of wheat as sources of novel genes in breeding new disease-resistant wheats,” research team leader Dr Phil Larkin says.

“The exciting part of the new research is that we have been able to retain the useful genes but leave behind the associated undesirable genes - most notably in this case those for yellow flour colour, an important quality characteristic in wheat,” Dr Larkin says.

“Unfortunately genes from wild relatives usually come in large blocks of hundreds of genes, and often include undesirable genes. Furthermore, these blocks of genes tend to stay together, even after many generations of breeding.

“The problem can be so difficult to overcome that plant breeders sometimes give up on very valuable genes because they cannot separate them from the problematic genes.”

A paper published this month in the journal Theoretical and Applied Genetics details how the team ‘recombined’ two wild blocks of genes from two different Thinopyrum grass species – a wild relative of wheat – bringing together resistance genes for leaf rust and Barley Yellow Dwarf Virus (BYDV), two of the world’s most damaging wheat diseases. The recombined gene ‘package’ may also carry a resistance gene against a new stem rust strain which is causing concern worldwide.

“The exciting part of the new research is that we have been able to retain the useful genes but leave behind the associated undesirable genes - most notably in this case those for yellow flour colour, an important quality characteristic in wheat,” Dr Larkin says.

By developing new ‘DNA markers’ and by careful testing the team has produced a number of the disease resistance ‘packages’ for wheat breeders, making it faster and easier to include these important disease resistance traits in future wheat varieties.

It is hoped other examples will follow and the genetic diversity available in wild species can be recruited more extensively for wheat improvement.


Story Source:

The above story is based on materials provided by CSIRO Australia. Note: Materials may be edited for content and length.


Cite This Page:

CSIRO Australia. "Building Disease-beating Wheat." ScienceDaily. ScienceDaily, 18 December 2007. <www.sciencedaily.com/releases/2007/12/071212201428.htm>.
CSIRO Australia. (2007, December 18). Building Disease-beating Wheat. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2007/12/071212201428.htm
CSIRO Australia. "Building Disease-beating Wheat." ScienceDaily. www.sciencedaily.com/releases/2007/12/071212201428.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins