Featured Research

from universities, journals, and other organizations

Simulating Kernel Production Influences Maize Model Accuracy

Date:
September 23, 2007
Source:
American Society of Agronomy
Summary:
By combining two approaches to model maize productivity, researchers have increased the accuracy of maize yield predictions. These findings may help to improve yield predictions throughout the world. Researchers are also predicting pollen movement from GM crops with this new model.

Recently, researchers at Iowa State University discovered a way to increase the accuracy of a popular crop model. By zeroing in on early stages leading up to kernel formation, scientists believe they can help improve yield predictions across a variety of environmental conditions.

Related Articles


The Crop Environment Resource Synthesis (CERES)- Maize model is used worldwide to predict maize yield each growing season. CERES-Maize predictions are based upon simulations of plant growth and the amount of carbon and nitrogen maize plants accumulate each day. While this approach provides growers with ballpark estimates of maize production, the accuracy decreases when growing conditions affect kernel formation more than plant growth.

Unlike most crop plants, maize has separate male and female flowers. Pollen from male flowers must travel to and fertilize female flowers located on ear. Each successful fertilization of a female flower leads to the production of a kernel.

"Pollination success depends on the amount of viable pollen produced, the presence of the pollen receptive part of the female flower, and close synchrony in male and female flower development," says Mark Westgate, Iowa State University professor of agronomy. "CERES-Maize does not consider these critical aspects of the pollination process."

To overcome the limitations of CERES-Maize, Westgate and his colleagues developed algorithms for a Flowering Model to simulate maize flowering dynamics. Once they were convinced the Flowering Model was properly imitating maize flowering patterns, they coupled it to CERES-Maize. The Modified version of CERES-Maize then was calibrated against two years of field data involving three hybrids, eight population densities, and seven nitrogen levels. The Modified version of CERES-Maize generated more accurate predictions of maize yield across a wide range of growing conditions.

"There are many situations in which kernel number is not limited by the ability of the plant to supply carbon and nitrogen to the ear," Westgate said. "By taking into account other factors influencing kernel number, CERES-maize is much more sensitive to biological factors that can affect yield."

What's up next for Westgate and his research team? A model they are developing to predict pollen movement from one field to another. They're using it along with the Flowering Model to predict the genetic purity of harvested seed. According to Westgate, genetic purity is a concern in hybrid seed production as well as for corn grown for non-genetically modified markets.

The team of scientists reported their findings in the September-October issue of Crop Science.


Story Source:

The above story is based on materials provided by American Society of Agronomy. Note: Materials may be edited for content and length.


Cite This Page:

American Society of Agronomy. "Simulating Kernel Production Influences Maize Model Accuracy." ScienceDaily. ScienceDaily, 23 September 2007. <www.sciencedaily.com/releases/2007/09/070921071649.htm>.
American Society of Agronomy. (2007, September 23). Simulating Kernel Production Influences Maize Model Accuracy. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2007/09/070921071649.htm
American Society of Agronomy. "Simulating Kernel Production Influences Maize Model Accuracy." ScienceDaily. www.sciencedaily.com/releases/2007/09/070921071649.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Dinosaur Species Found in Museum Collection

New Dinosaur Species Found in Museum Collection

Reuters - Innovations Video Online (Nov. 27, 2014) A British palaeontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum. Pentaceratops aquilonius was related to Triceratops and lived at the end of the Cretaceous Period, around 75 million years ago. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include 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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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