CMS line 803A was developed by the recent discovery of JW new nature source sterile through many continuous generation of backcross with the L301B/Di Gu B hybrid descendant.

• 摘要不育系803A是利用新发现的JW型新质源不育株做母本，L301B/地谷B的杂交后代做父本，经连续多代回交选择而成。