Germplasm Enhancement of Maize
GEM Data Report
M. Shen
USDA-ARS NCRPIS GEM
- December 5, 2012 -
Germplasm Enhancement of Maize
Usage of GEM-Ames website
World Map of Live Streaming Traffic
Germplasm Enhancement of Maize
Usage of GEM-Ames website
World Map of Referrer Tracker
Germplasm Enhancement of Maize
GEM-Ames Data on Website
Corn images for GEM-Ames released lines (in PDF
format):
70 images as a total (from yr 05 to 12)
Observation data of breeding crosses: year 2009 to 2011
Characterization data: year 2006 to 2011
Disease data from year 2007 to 2011
Lab NIR data and DSC data
Germplasm Enhancement of Maize
GEM Disease Evaluation Data
The method of disease evaluation is upon the collector
1 ~ 5 scale
1 ~ 9 scale
1 ~ 7 scale
It was proposed to use one GEM rating scale to facilitate
comparisons and has been approved by the TSG in
September 2012.
GEM disease evaluation scale:
1 ~ 9 (1 = resistant and 9 = susceptible)
All the disease evaluation data contain both the original
scale and GEM scale
Germplasm Enhancement of Maize
GEM Disease Evaluation Data
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2012
Total Numbers of GEM Yield Trial Plots
18000
16000
14000
12000
10000
8000
6000
4000
2000
0
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Total plots
GEM
Coops
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2012
Experiments: 41
Replicated at 5 to 8 locations
Plots: 13,000
The number of complete experiments lost: 1 (2.4%)
The number of experiments that have 2 or more
reps lost: 4 (9.8%)
The number of total reps lost due to weather: 29
(12.3%)
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2012
There are 242 top crosses that out-performed the
mean yield of 5 checks (10.5% of 2311 entries of the
top crosses)
Of these 242 GEM top crosses, 189 were from the
first year tests and 53 from the second year tests
The range of CV’s for yield was from 11.1 to 23.1%
(9.0-21.1% last year ) and the mean of the CV’s is
15.2% (last year 13.5%)
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2012
The deviation of CV means since year 2005
2.50
2.00
1.50
1.00
0.50
0.00
2005
-0.50
-1.00
-1.50
-2.00
2006
2007
2008
2009
2010
2011
2012
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2012
Summary by
experiment for
“quick view”
on page 14 of
the yield trial
section
Germplasm Enhancement of Maize
Special Thanks to the Companies That
Conducted Yield Trial In-Kind Support (2012)
AgReliant Genetics, LLC
BASF Plant Science Breeding LLC
Beck’s Superior Hybrids, Inc.
Dow AgroSciences
Forage Genetics
Genetic Resources, Inc.
Illinois Foundation Seeds, Inc.
Ingredion
Monsanto Company
PANNAR Seed
SEEDirect
Syngenta Seeds, Inc.
Wyffels Hybrids