Dear Research Cooperators and Others,
I want to thank you for your support during the past year. As 2013 draws to a close, I am posting a few research highlights. Except for Table 1, the data are from locations spread over Indiana, Illinois, Iowa, and Nebraska. Of course, this is just a small portion of what will become a much larger data base, most of which is confidential to collaborating companies. Nonetheless, I want to share three things that we have learned in 2013:
#1 B73ESY is at least equal to LH132 and probably superior to LH119. Results from a four-location experiment are presented in Table 1 below and confirm an earlier study presented elsewhere in this blog (Click here for the results of the earlier experiment).
Table 1. Agronomic Performance of B73ESY, LH119, and LH132 Hybrids Averaged over Four Locations in Illinois and Indiana in 2013.
Female Grain Yield Grain Moisture Stalk Lodging Root Lodging
Parent* Bu/Acre % % %
B73ESY 223 22.5 1 1
LH132 214 21.3 3 0
LH119 201 22.1 2 0
#2 B73ESY is about equal to LH132CT under normal growing conditions. Results averaged over nine locations are presented in Table 2 below and show little difference in hybrid performance, except when yields are low and then, not surprisingly, LH132CT is vastly superior.
Table 2. Hybrid* Performance (Bushels per Acre) of B73ESY Compared to LH132CT in 2013.
Number of Locations B73ESY LH132CT Difference
9 189 197 - 8
7 (High-Yield) 209 205 + 4
2 (Low-Yield) 117 169 - 57
#3 LH132CT is superior to B73ESYCT under most growing conditions. Results averaged over fifteen locations (see Table 3) clearly demonstrate that when yields are reasonably high, LH132CT (and by extension, B73ESY) will out-perform B73ESYCT. This trend was also evident in 2012 when it was observed that B73ESYCT was better than LH132CT under severe drought stress with the reverse being true under moderate drought stress (Click here to go 2012 data).
Table 3. Hybrid* Performance (Bushels per Acre) of LH132CT Compared to B73ESYCT in 2013.
Number of Locations LH132CT B73ESYCT Difference
15 181 173 8
7 (High-Yield) 217 205 12
8 (Low-Yield) 150 144 6
*B98rly was the male parent. B98rly is a narrow-based synthetic formed from B98, B97, LH82, and LH123.
As always, I would welcome your questions and comments. Please feel free to email me directly if you prefer to have your comments kept confidential.