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:2/17/2017)... ... February 17, 2017 , ... Smiles by Seese is ... in Davidson, NC. Dr. Brian Seese leads the practice as a skilled and highly ... one roof. Smiles by Seese serves patients of all ages with excellence in general, ...
(Date:2/17/2017)... ... February 17, 2017 , ... For ... assistance management solution to the exhibit floor for the 2017 HIMSS Conference ... , From Feb. 19–23, 2017, more than 40,000 healthcare industry professionals are expected ...
(Date:2/17/2017)... (PRWEB) , ... February 17, 2017 , ... ... organizations, has been named a finalist in the 8th Annual DecisionHealth Platinum Awards ... healthcare delivery system. Qualis Health’s work is recognized across multiple award categories, highlighting ...
(Date:2/17/2017)... ... February 17, 2017 , ... ... and focusing on all facets of clinical trial planning and management. Pharmica discussed ... engagement, and more. In addition, attendees stopping by Pharmica’s booth were able to ...
(Date:2/17/2017)... CREEK, CO (PRWEB) , ... February 17, 2017 , ... ... second annual International Healing NET Foundation Summit from February 21 - 23 in Beaver ... NET Foundation (HNF). This marks the Summit’s second year in Beaver Creek, hosting over ...
Breaking Medicine News(10 mins):
(Date:2/17/2017)... India , February 17, 2017 According ... (Airborne Particle Counters, Liquid Particle Counters), Application (Cleanroom Monitoring, Contamination Monitoring ... Forecast to 2021" published by MarketsandMarkets, the market is expected to ... 2016, at a CAGR of 3.7% from 2016 to 2021. ... ...
(Date:2/17/2017)... Research and Markets has announced the addition of ... their offering. ... separate comprehensive analytics for the US, Canada , ... , Latin America , and Rest of World. ... Also, a six-year historic analysis is provided for these markets. Market data ...
(Date:2/17/2017)...  BioDigital, Inc., creators of the BioDigital Human ... body mapping technology with eClinicalWorks, a privately held ... be used to capture and present dermatology exam ... body. BioDigital pilots show using a body to ... the precision of clinical annotations compared to standard ...
Breaking Medicine Technology: