By statistical analysis about the yield,quality and disease resistance the rice varieties,approved for release by the Crop Cultivar Appraisal Commission of Hunan province in Hunan province regional tests during 2010- 2015,The 197 rice varieties examined and approved in Hunan Province in the past 6 years,among them,up to 184 hybrid rice varieties,accounting for 93. 4%,while the inbred rice only 13,accounting for 6. 6%,8 high quality rice varieties( combinations),accounting for 4. 1%. The range of seeds yield...