Progress of Japonica rice breeding varieties in '10th Five-year Plan' in Yunnan plateau.

Results from Yunnan provincial rice regional trials of 2002-2004 indicated obvious progress were achieved both in quality and high yield breeding during '10~(th) Five-year Plan' in Yunnan.In quality breeding,amour rice and soft rice varieties were bred and applied for 35 4700 hm~2 in production.In high yield breeding,the average yield of newly bred varieties increased by 10% compared with that in '9th Five-year Plan' and in the same time the grain quality was also significantly improved,with application of 711 826.67 hm~2.However,no obvious advance was attained in resistance to main diseases compared with that in last Five-year Plan.In quality breeding,on the base of keeping suitable number of effective panicles and grain weight,raising grains per panicle or seed setting rate was key to improve both the yield and grain quality.