Featured Research

from universities, journals, and other organizations

Improving Hardiness In Grapes: Research Probes Day Length Sensing

Date:
September 10, 2009
Source:
USDA/Agricultural Research Service
Summary:
Scientists are a step closer to improving the hardiness of grape varieties that can be damaged and destroyed by fall frosts and cold winters in North American vineyards.

Finding the genes that control day length sensitivity in riverbank grapes may help make commercial grapes more cold hardy.
Credit: Photo courtesy of the Natural Resources Conservation Service, USDA.

Agricultural Research Service (ARS) scientists are a step closer to improving the hardiness of grape varieties that can be damaged and destroyed by fall frosts and cold winters in North American vineyards.

Grapes, like many other woody plants, stop growing and drop their leaves in the fall, entering a dormant phase that allows them to prepare for and survive the winter. Understanding the timing of this seasonal growth cessation in grapes is a key objective for scientists. If they can find genes that control it, they can help breeders develop more marketable cold-tolerant grapes.

The wild grape species Vitis riparia is unusual among wild grapes because it stops growing when the day length drops below 13 hours, which occurs in late August in upstate New York, according to Amanda Garris, a geneticist at the ARS Grape Genetics Research Unit in Geneva, N.Y. Most other grape species are not sensitive to day length.

Garris, ARS molecular biologist Christopher Owens, James Luby of the University of Minnesota, and Anne Fennel of South Dakota State University want to identify genes for day length sensitivity in V. riparia.

The researchers crossed V. riparia with Seyval, a hybrid grape insensitive to day length. They raised some of the offspring in fields, with natural fluctuations of day length, rainfall and temperature. Others they raised in greenhouses where water and temperature levels remained constant, but artificial "day" lengths were gradually reduced to mimic conditions outside.

They evaluated growth cessation patterns and mapped differences found in 120 DNA markers and six genes. They discovered that in greenhouse-grown grapevines, a region of chromosome 13 is responsible for day-length-induced growth cessation. But in the field, the interaction of multiple cues such as day length, rainfall and temperature fluctuations is more likely to explain the timing of growth cessation.

The study, considered a preliminary step toward identification of genes for day length sensitivity and growth cessation, was recently published in the Journal of the American Society of Horticultural Science.


Story Source:

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


Cite This Page:

USDA/Agricultural Research Service. "Improving Hardiness In Grapes: Research Probes Day Length Sensing." ScienceDaily. ScienceDaily, 10 September 2009. <www.sciencedaily.com/releases/2009/08/090830100306.htm>.
USDA/Agricultural Research Service. (2009, September 10). Improving Hardiness In Grapes: Research Probes Day Length Sensing. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2009/08/090830100306.htm
USDA/Agricultural Research Service. "Improving Hardiness In Grapes: Research Probes Day Length Sensing." ScienceDaily. www.sciencedaily.com/releases/2009/08/090830100306.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