In this study, 80 F7:8 recombinant inbred lines (RIL), derived from a cross between dent corn and waxy corn, were evaluated for 10 grain yield and eating-related traits over a two-year period. A total of 39 quantitative trait loci (QTLs) and 74 epistatic interactions were confirmed in 2011 and 2012. All QTLs detected in 2011 and 2012, qAC9 (amylose content), qEH4 (ear height), qSEL6 (setted ear length), and q100KW10 (fresh 100 kernel weight) had higher phenotypic variance and were observed in both years; therefore, they may be considered major QTLs. We reported that the QE interaction affects (QTLs and environmental changes) for qEH4, qSEL6, and q100KW10 in discussion. Some new QTLs identified in this study were located on different loci compared with other studies. The genetic region (bin 4.08) strongly controls plant height and ear height, and results from pleiotropy and/or tight linkage. qST3 (including stem thickness) and qEH3 were co-located within two common adjacent simple sequence repeat (SSR) markers (umc2275 and umc1273), whereas qEL6 (ear length) and qSEL6 were co-located within two common adjacent SSR markers (umc2309 and bnlg238). Thus, these SSR markers are a useful selection tool for screening grain yield and yield component traits.

• Kyu Jin Sa(Department of Applied Plant Sciences, College of Agriculture and Life Sciences, Kangwon National University)
• Jong Yeol Park(Maize Experiment Station, Gangweon Agricultural Research and Extension Services)
• Ki Jin Park(Maize Experiment Station, Gangweon Agricultural Research and Extension Services)
• Ju Kyong Lee(Department of Applied Plant Sciences, College of Agriculture and Life Sciences, Kangwon National University) Corresponding Author