Preliminary study on the relationship between yield and other agronomic traits in wheat.

[Objective]The study was aimed to determine the key indices for high-yield and super high-yield breeding of wheat. [Method]Ten wheat varieties (or lines), suitable for cultivation under Anhui ecological conditions, were chosen as the experimental materials to study the relationship between yield and yield components (i.e. the number of spikes, 1 000-grain weight, grain number, grain weight, grain number per unit area, pike length, number of fruit spikelet, number of abortive spikelet), biomass, plant height, and the harvest index.[Results] Coefficience between yield and other traits varied in direction and level. Among the studied agronomic traits, there were significant differences. For most of the varieties (or lines) studied, grain yield was significantly correlated to biomass and grain weight per spike. For some of the other varieties (or lines), grain yield was significantly correlated to other parameters.[Conclusion] Yield parameter per se can be adopted effectively in selecting potential high-yield and super high-yield wheat varieties.