1. National Corn and Sorghum Research Center; Kasetsart Univ.; Klangdong Pakchong Nakhonratchasima 30320 Thailand
2. USDA-ARS Plant Genetics Research Unit and Dep. Agronomy; Univ. of Missouri; 110 Curtis Hall Columbia MO 65211
3. Dep. Statistics; Univ. of Missouri; 105 Math Science Building Columbia MO 65211
4. USDA-ARS Plant Genetics Research Unit retired and Dep. Entomology; Univ. of Missouri; 204 Curtis Hall Columbia MO 65211