Monday, December 23, 2013

Research Highlights for 2013

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
*B98rly was the male parent.  B98rly is a narrow-based synthetic formed from B98, B97, LH82, and LH123.

#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 
*B98rly was the male parent.  B98rly is a narrow-based synthetic formed from B98, B97, LH82, and LH123.

#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.

In 2014, ESY and CT lines will be evaluated using commercial inbred lines as the male parent rather than B98.  Six companies will be participating in this collaborative effort with over a dozen male inbred lines being used as testers.

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. 

Jim Friedrich

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