Breeding and Research of Zheyou 10,A New Late-cropping Japonica Hybrid Rice Combination with High Yield and Good Grain Quality

Zheyou 10,a new Late-cropping Japonica Hybrid Rice Combination with High Yield and Good Grain Quality was developed by crossing 8204A (a late japonica BT CMS line) with the restorer line Zhehui9816.Zhehui9816 was developed by crossing Zhehui93-1 with Wanhui 9 through 5 years,It yielded an average of 8.085 t/hm2 in two years (2003 2004) of the regional yield trials for Latecropping Japonica Hybrid Rice of Zhejiang Province,5.4% higher than that of the check Xiushui63.Consequently,it was registered and released for commercial production in Zhejiang Province at January of 2008.Zheyou10 showed vigorous heterosis,high yielding potential,large panicle,lodging resistance,good grain quality and timely discoloring in late stage.