Analysis on main traits of corn cultivars certified recently 10 years in Sichuan province

Yield, 8 agronomic traits, 5 nutritional quality traits, and their variation tendency of 226 corn cultivars certified during 2005-2014 in Sichuan province were analyzed. The results showed that the average product of certified corn cultivars was 536.66 kg/667m2, but it had no comparative superiority. The average growth period, plant height, ear, kernels per row, rows per ear, 100-seed weight, seed-setting rate was 123.26 d, 262.96 cm, 19.54 cm, 36.45 grains, 16.32 rows, 104.92 cm, 30.78 g, 85.35%, respectively, and the inter-annual average variation was not obvious. average unit weight was 736.66 g/L, over national first grade. The average crude protein content, crude starch content, crude fat content and lysine content was 9.99%, 73.93%, 4.53%, 0.31% respectively, which revealed the nutrition level of these corn cultivars was not high. At last, the paper pointed out that corn breeding in Sichuan province should choose the variety optimum ecological condition in practice, and increase input on the breeding of corn with high yield and high quality.