Analysis of New Breeding Rice Variety Yield Components in 2006 Jilin Province

Twenty seven rice varieties developed in Jilin 2006 rice regional trial were used as materials,and the rice varieties′ yield components of early,middle,late heading of 4 mature stages were analyzed.The results showed that there should be different standards in choosing different maturity rice varieties in rice high yield breeding.Middling panicles,grain number per panicle and 1 000-grain weight,high seed setting rate rice varieties should be chosen in high yield breeding of early maturity.Middling plant height,big panicle and high seed setting rate rice varieties should be chosen in high yield breeding of middle and middle-late maturity.To late maturity rice varieties high yield breeding,all the yield components should be considered.The common point in all matutity of high yield breeding was to choose high seed setting rate rice variety.