Featured Research

from universities, journals, and other organizations

Tough new spuds take on double trouble

Date:
April 8, 2010
Source:
USDA/Agricultural Research Service
Summary:
Five new potato breeding lines being tested by agricultural scientists could open the door to new varieties of the crop that resist powdery scab and black dot diseases.

Five new potato breeding lines now being tested by ARS scientists and collaborators could provide the basis for varieties that can handle powdery scab and black dot diseases.
Credit: iStockphoto

Americans love potatoes, consuming about 130 pounds per person annually. But it's a wonder the spuds even make it to the dinner table, given the many fungal diseases that attack the tuber crop -- powdery scab and black dot among them.

Now, five new potato breeding lines being tested by Agricultural Research Service (ARS) scientists and collaborators could open the door to new varieties of the crop that resist powdery scab and black dot diseases, caused by the fungi Spongospora subterranea and Colletotrichum coccodes, respectively.

These fungi often occur together in the same soil, attacking the potato plant's roots, tubers or stems. Outbreaks can cause yield losses of up to 25 percent and prevent tubers from reaching the sizes needed by the french fry and fast-food industry. Of the two fungi, only black dot can be chemically controlled with fungicides; however, multiple applications are needed, ratcheting up production costs to prohibitive levels. A more sustainable alternative is genetic resistance, according to geneticist Chuck Brown, with the ARS Vegetable and Forage Crops Production Research Laboratory in Prosser, Wash.

In studies conducted there since 2004 with Washington State University professor Dennis Johnson, assistant Tom F. Cummings and postdoctoral associate Nadav Nitzan, Brown screened an existing collection of wild and cultivated potatoes for sources of natural resistance to powdery scab and black dot in a local grower's infested field.

The effort ultimately led to five advanced potato breeding lines that had been developed from a wild species from Mexico, Solanum hougasii, and a recent commercial release, Summit Russet. In three years of field trials in Washington State and Idaho, the potato breeding lines consistently showed fewer disease symptoms -- root galling for powdery scab and sclerotia-infected stems for black dot -- than other lines and varieties tested.

The potato breeding lines themselves aren't intended for production. Instead, they'll be made available as seed for use in breeding programs aimed at developing the first commercial varieties with dual resistance to the fungal diseases, according to Brown, who discussed the research at the 48th Annual Washington State Potato Conference in January.

The research findings have been published in the journal Plant Disease.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Jan Suszkiw. Note: Materials may be edited for content and length.


Journal Reference:

  1. Nadav Nitzan, Marc A. Evans, Tom F. Cummings, Dennis A. Johnson, Dallas L. Batchelor, Chris Olsen, Kathleen G. Haynes, and Charles R. Brown. Field Resistance to Potato Stem Colonization by the Black Dot Pathogen Colletotrichum coccodes. Plant Disease, 2009; 93 (11): 1116 DOI: 10.1094/PDIS-93-11-1116

Cite This Page:

USDA/Agricultural Research Service. "Tough new spuds take on double trouble." ScienceDaily. ScienceDaily, 8 April 2010. <www.sciencedaily.com/releases/2010/03/100303113954.htm>.
USDA/Agricultural Research Service. (2010, April 8). Tough new spuds take on double trouble. ScienceDaily. Retrieved September 16, 2014 from www.sciencedaily.com/releases/2010/03/100303113954.htm
USDA/Agricultural Research Service. "Tough new spuds take on double trouble." ScienceDaily. www.sciencedaily.com/releases/2010/03/100303113954.htm (accessed September 16, 2014).

Share This



More Plants & Animals News

Tuesday, September 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Tobacco Farmers Thrive Amid Challenges

Some Tobacco Farmers Thrive Amid Challenges

AP (Sep. 16, 2014) The South's tobacco country is surviving, and even thriving in some cases, as demand overseas keeps growers in the fields of one of America's oldest cash crops. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

AFP (Sep. 16, 2014) Scientists say a female colossal squid weighing an estimated 350 kilograms (770 lbs) and thought to be only the second intact specimen ever found was carrying eggs when discovered in the Antarctic. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

Ivorians Abandon Monkey Pets in Fear Over Ebola Virus

AFP (Sep. 16, 2014) Since the arrival of Ebola in Ivory Coast, Ivorians have been abandoning their pets, particularly monkeys, in the fear that they may transmit the virus. Duration: 00:47 Video provided by AFP
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