Navigation Links
Simulating kernel production influences maize model accuracy
Date:9/20/2007

MADISON, WI, Sept. 18, 2007 -- 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. The team of scientists reported their findings in the September-October issue of Crop Science.

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.

Whats 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.


'/>"/>

Contact: Sara Uttech
suttech@crops.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Related medicine news :

1. Bioengineering production strains - Microbia develops new methods
2. Therapeutic Monoclonal Antibody Production Is More Profitable Than Small Molecule Drugs
3. Digestive acid production dependent on newly found hormone
4. Tea Found To Boost Insulin Production And Prevent Cataract
5. Roche confirms Tamiflu production talks in US
6. Conroy’s May Not Be Permitted To Resume Production Soo
7. Massive Production Of Bird Flu Vaccine To Be Initiated In China
8. Chugai Pharmaceutical To Initiate Domestic Production Of Bird Flu Vaccine
9. Pigs have another utility: production of healthy oils!
10. Coca Cola To Enhance Production Of Diet Coke
11. Natco Pharma Commences Production At Dehradun Unit
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2017)... Calif. (PRWEB) , ... May 26, 2017 , ... ... the integration of the CareFusion NOX-T3 portable sleep monitor with its Somnoware Sleep ... a consistent, browser-based interface for diagnostic device operations. With this platform, initializing devices ...
(Date:5/26/2017)... ... ... After raising nearly $30,000 on Kickstarter , about three-times its original ... discounted crowdfunding price on Indiegogo . , “Along with creating an anti-stress gadget ... a fidget toy to the market that was made of superior quality and wouldn’t ...
(Date:5/26/2017)... ... May 26, 2017 , ... “When the Stars Lead Home”: a poignant story ... published author Laura Weigel Douglas, an avid reader who lives in the Pacific Northwest ... feels like Green Hills Adventure Camp. She couldn’t be more grateful. , Twelve-year old ...
(Date:5/26/2017)... ... ... Water damage to the flooring of several classrooms at The Fort Lee Elementary ... number of critical issues to address before students could return to classes. , First, ... no disruption to class schedules. Second, the project had to comply with New Jersey ...
(Date:5/24/2017)... ... May 24, 2017 , ... NucleusHealth ™, advancing ... received U.S. Food and Drug Administration (FDA) 510(k) clearance for its ... cloud platform for medical image management. At the core is patented streaming technology ...
Breaking Medicine News(10 mins):
(Date:5/22/2017)... May 22, 2017  As the specialty pharmacy ... continue to make the revolutionary shift from volume-based ... for ensuring positive patient outcomes and shaping the ... shifting focus away from clinical trials and toward ... long-term specialty drug therapy utilization in precise patient ...
(Date:5/15/2017)... Enterin Inc., a privately-held CNS pharmaceutical company based ... to treat Parkinson,s disease (PD), has enrolled the first patient ... randomized, controlled, multicenter study involving patients with PD and taking ... over a 9-to-12-month period. The first stage is open label ... Participating sites include Denver , ...
(Date:5/10/2017)... , May 10, 2017 Global Health ... Latin America , published its 2017 ranking ... ranking is based on extensive data analysis from GHI,s ... largest hospitals database for the region. The GHI database covers ... , offering more than 130 data points for each institution ...
Breaking Medicine Technology: