Featured Research

from universities, journals, and other organizations

Genomic atlas of gene switches in plants provides roadmap for crop research

Date:
June 30, 2013
Source:
McGill University
Summary:
What allows certain plants to survive freezing and thrive in the Canadian climate, while others are sensitive to the slightest drop in temperature? Those that flourish activate specific genes at just the right time -- but the way gene activation is controlled remains poorly understood.

A new map will help scientists localize regulatory regions in the genomes of crop species such as canola, a major crop in Canada.
Credit: emjay smith / Fotolia

What allows certain plants to survive freezing and thrive in the Canadian climate, while others are sensitive to the slightest drop in temperature? Those that flourish activate specific genes at just the right time -- but the way gene activation is controlled remains poorly understood.

A major step forward in understanding this process lies in a genomic map produced by an international consortium led by scientists from McGill University and the University of Toronto and published online today in the journal Nature Genetics.

The map, which is the first of its kind for plants, will help scientists to localize regulatory regions in the genomes of crop species such as canola, a major crop in Canada, according to researchers who worked on the project. The team has sequenced the genomes of several crucifers (a large plant family that includes a number of other food crops) and analyzed them along with previously published genomes to map more than 90,000 genomic regions that have been highly conserved but that do not appear to encode proteins.

"These regions are likely to play important roles in turning genes on or off, for example to regulate a plant's development or its response to environmental conditions," says McGill computer-science professor Mathieu Blanchette, one of the leaders of the study. Work is currently underway to identify which of those regions may be involved in controlling traits of particular importance to farmers.

The study also weighs in on a major debate among biologists, concerning how much of an organism's genome has important functions in a cell, and how much is "junk DNA," merely along for the ride. While stretches of the genome that code for proteins are relatively easy to identify, many other 'noncoding' regions may be important for regulating genes, activating them in the right tissue and under the right conditions.

While humans and plants have very similar numbers of protein-coding genes, the map published in Nature Genetics further suggests that the regulatory sequences controlling plant genes are far simpler, with a level of complexity between that of fungi and microscopic worms. "These findings suggest that the complexity of different organisms arises not so much from what genes they contain, but how they turn them on and off," says McGill biology professor Thomas Bureau, a co-author of the paper.


Story Source:

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


Journal Reference:

  1. Blanchette et al. An atlas of over 90,000 conserved noncoding sequences provides insight into crucifer regulatory regions. Nature Genetics, 2013 DOI: 10.1038/ng.2684

Cite This Page:

McGill University. "Genomic atlas of gene switches in plants provides roadmap for crop research." ScienceDaily. ScienceDaily, 30 June 2013. <www.sciencedaily.com/releases/2013/06/130630144921.htm>.
McGill University. (2013, June 30). Genomic atlas of gene switches in plants provides roadmap for crop research. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2013/06/130630144921.htm
McGill University. "Genomic atlas of gene switches in plants provides roadmap for crop research." ScienceDaily. www.sciencedaily.com/releases/2013/06/130630144921.htm (accessed July 30, 2014).

Share This




More Plants & Animals News

Wednesday, July 30, 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
Raw: Otters Enjoy Water Slides at Japan Zoo

Raw: Otters Enjoy Water Slides at Japan Zoo

AP (July 30, 2014) River otters were hitting the water slides to beat the summer heatwave on Wednesday at Ichikawa City's Zoological and Botanical Garden. (July 30) 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