Role and Effect of Self-bred Lines TieC8605-2 in Maize Breeding in China

TieC8605-2 has been one of important maize selfbred lines,which has been used extensively in the maize breeding in China,contributing very much to high yield,good quality and resistance maize hybrid breed.The line was used extensively because it had high combining ability,strong resistance to adversity,wide adaptability and the superior comprehensive agronomic property.The maize hybrids that were bred with TieC8605-2 as a parent were high and stable yield.The adaptability was wide,the lodging resistance and disease resistance ability were strong,the popularized area was large,and the variety lifecycle was long.Until end of 2005,14 hybrids,which were cultivated with TieC8605-2 as one of parent,were authorized by nation or province and planted up to 8.7 million hectares;and 16 derived lines,which were selected with TieC8605-2 as middle material,were cultivated for 16 hybrids breeding.The hybrids were popularized and the planting area was enlarging year-by-year for noble economic benefit and social benefit.