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 April 23, 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 April 23, 2014).

Share This



More Plants & Animals News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Leopard Bites Man in India

Raw: Leopard Bites Man in India

AP (Apr. 22, 2014) A leopard caused panic in the city of Chandrapur on Monday when it sprung from the roof of a house and charged at rescue workers. (April 22) Video provided by AP
Powered by NewsLook.com
Iowa College Finds Beauty in Bulldogs

Iowa College Finds Beauty in Bulldogs

AP (Apr. 22, 2014) Drake University hosts 35th annual Beautiful Bulldog Contest. (April 21) Video provided by AP
Powered by NewsLook.com
805-Pound Shark Caught Off The Coast Of Florida

805-Pound Shark Caught Off The Coast Of Florida

Newsy (Apr. 22, 2014) One Florida fisherman caught a 805-pound shark off the coast of Florida earlier this month. Video provided by Newsy
Powered by NewsLook.com
Breakfast Foods Are Getting Pricier

Breakfast Foods Are Getting Pricier

AP (Apr. 21, 2014) Breakfast is now being served with a side of sticker shock. The cost of morning staples like bacon, coffee and orange juice is on the rise because of global supply problems. (April 21) Video provided by AP
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