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Divergent Selection for Rind Penetrometer Resistance and Its Effects on European Corn Borer Damage and Stalk Traits in Corn

Sheri A. Martina, Larry L. Darrah*,b and Bruce E. Hibbardc

a Dep. of Entomology
b USDA-ARS Plant Genetics Research Unit and Dep. of Agronomy
c USDA-ARS Plant Genetics Research Unit and Dep. of Entomology, Univ. of Missouri, Columbia, MO 65211



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  		Fig. 1. Measuring rind penetrometer resistance with the modified electronic rind penetrometer in the middle of the internode below the primary ear attachment node.

 


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  		Fig. 2. Modified electronic leaf penetrometer measuring the force necessary to puncture the leaf between ribs.

 


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  		Fig. 3. Predicted responses to bidirectional rind penetrometer resistance selection for (A) grain yield (four environments), (B) stalk lodging (four environments), (C) rind penetrometer resistance (six environments), (D) second-generation European corn borer damage (six environments), (E) percentage crude fiber in the stalk (six environments), (F) percentage cellulose in the stalk (six environments), (G) percentage lignin in the stalk (six environments), and (H) percentage silica in the stalk (six environments).

 




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