Germplasm Enhancement of Maize
GEM Data Report
M. Shen
USDA-ARS NCRPIS GEM
- December 11, 2013 -
Germplasm Enhancement of Maize
Usage of GEM-Ames website
World Map of Cumulative Visitors
Germplasm Enhancement of Maize
Usage of GEM-Ames website
Top 10 countries with the most visitors
Germplasm Enhancement of Maize
Usage of GEM-Ames website
Top 10 regions with the most visitors
Germplasm Enhancement of Maize
GEM-Ames Data on Website
70 Corn images for GEM-Ames released lines (in PDF
format):
Observation data of breeding crosses: year 2009 to 2012
Characterization data: year 2006 to 2012
Disease data from year 2007 to 2012
Lab NIR data and DSC data
GEM yield trial data: year 1999 to 2013
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 - 2013
Experiments: 40
Replicated at 4 to 8 locations
Plots: over 10,000
The number of total reps lost due to weather: 9
(4.0%)
The number of experiments that have 2 or more
reps lost: 3 (1.3%)
No experiment was lost because of weather
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2013
The Number of Plots Lost Each Year
45
40
35
30
25
20
15
10
5
0
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2013
There are 261 top crosses that out-performed the
mean yield of 5 checks (14.2% of 1839 entries of the
top crosses)
Of these 261 GEM top crosses, 186 were from the
first year tests and 75 from the second year tests
The range of CV’s for yield is from 8.3 to 18.2%
(11.1-23.1% last year ) and the mean of the CV’s is
12.4% (last year 15.2%)
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2013
The deviation of CV means of yield since year 2005
3.00
2.50
2.00
1.50
1.00
0.50
0.00
2004
-0.50
2005
2006
2007
2008
2009
2010
2011
2012
-1.00
-1.50
-2.00
(CV of each year – CV mean)
2013
2014
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2013
The Percentage of plots by GEM & COOPs
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
GEM
COOP
Germplasm Enhancement of Maize
GEM-Ames trial summary - 2013
Summary by
experiment for
“quick view”
on page 33 of
the yield trial
section
Germplasm Enhancement of Maize
Special Thanks to the Companies That
Conducted Yield Trial In-Kind Support (2013)
AgReliant Genetics, LLC
BASF Plant Science Breeding LLC
Beck’s Superior Hybrids, Inc.
Dow AgroSciences
Forage Genetics
Illinois Foundation Seeds, Inc.
Ingredion
Monsanto Company
PANNAR Seed
SEEDirect
Syngenta Seeds, Inc.
Wyffels Hybrids