Abstract: 01A3 is an excellent maize inbred line bred by Xinxiang Academy of Agricultural Sciences, Henan Province. It has the characteristics of high combining ability, good agronomic traits, good firmness, and mid-early maturity. A series of derivative lines were selected based on 01A3, and more excellent corn hybrids were selected using 01A3 and sister lines A01, Xin6 and their derivative lines. 01A3 also has defects and can be improved and reused.

Key words: maize, inbred line, 01A3, sister line, derivative line, selective breeding