Changes of Root Activity and Its Correlation with Plant Biomass of Soybean Cul-tivars Released in Different Years
In order to understand the changes of root activity (RA), and their correlation with organ biomass, root bleeding sap weight (BSW), during the genetic improvement of 27 soybean cultivars released in 1923 to 2009 were bred in Jilin province. The RA, BSW and organs biomass were studied at four-leaves stage (V4), lfowering stage (R2), pod setting (R4) and seed iflling stage (R6). With increasing growth period, plant organ biomass increased, while RA and BSW were observed unimodal curve changes and highest at R4 stage. Only in R4 stage, but no in V4, R2 and R6 period, RA, BSW, organ biomass and release year were exhibited signiifcant or extremely signiifcant positive correlation. In R4 stage, RA and BSW, stem, leaf and root biomass were dis-played signiifcant or extremely signiifcant positive correlation. There were no signiifcant differences in the ratio between aboveground organs biomass and RA. The RA, BSW and organs biomass were increased with genetic improvement of soybean. RA was closely related to organs biomass and BSW at R4 stage. Therefore, the RA was considered to be the important index in high-yield breeding at R4 stage.
soybeangenetic improvementroot activitybleeding sap weightbiomass of organs
NETL
NSTL
万方数据
维普
