is the second largest corn production country in the world followed by USA. However, the corn production technology in China is around 60% that of USA. A new seed company, "Gongjuliang Dr.Corn Seed Company" established in 2008 formed a new population for the ecological zone of North East China and Korea Peninsular using 250 popular hybrids market in China. The first random mating was made in North Shenyang, Lyaoliang Province in 2008. The second random mating was made Sanya, Hainan Province during the winter season. The third random mating was made in North Shenyang, Gongjuling in China and Gunwi in South Korea. The fourth random mating was made in Sanya during the winter season of 2009/2010. From this North East Population (NEP), we will breed new corn inbred lines for high combining ability, and tolerance to both biotic and abiotic stresses with non-GMO trait.

We studied on the diallel cross analysis of three different types of corn(Zea mays L.); supersweet(ss), sticky waxy and normal field corn in Korea and China. Four inbred lines each of three different types were crossed in a full diallel. Testing of 66 F1 crosses were made at two locations in Korea and China, respectively, in 2009. The objectives of the experiment was first to study different levels of heterosis among three types. In Korea, average ear length of 16 F1 crosses was the longest in N x wx (197mm), followed by wx x ss (193mm) and N x ss (191mm). Average of ss, wx and N were 135mm, 171 mm and 155mm. The relatively high level of N might be location specific breeding results, where the testing was done at the center of waxy corn breeding. Trends of three F1 crosses in China were similar with normal and supersweet corn. The result of this study has supported for breeding of high quality sticky-supersweet and high yield potential of normal -supersweet corn hybrids in the developing world to provide nutrition, sugar and other minerals such as Vitamin A and anthocyanin, simultaneously as a high quality food.