Breeding and Application of New Extra-early Maize Hybrid Tezao 2

The new maize hybrid Tezao 2 was bred by cooperation of institute of crop Science and modern agriculture research centre of Shanxi academy of agricultural sciences.It was combined with two inbred lines Taizao1001 and Rzong57-3.Tezao 2 was an extra-early maturing hybrid.It needed accumulative temperature 2 300 ℃(≥10 ℃).The hybrid showed high yield at various experiment plots in different areas in 2009—2010.The result showed that it had earliness,high yield,high quality,high disease resistance,lodging resistance,high starch and deep-seeding tolerance.The plant populations were 60 000-67 500/hm2 and the male and female were sowed in same period when seed was produced.