Abstract:

In order to improve breeding foreseeability and selection efficiency, the conception, genetic characters, and the relationship with yield components and yield of grain-leaf ratio were discussed. We thought that grain-leaf ratio was not only an index to measure the coordination ability of sink, resource and stream of wheat population and the photosynthetic productivity per unit leaf area, but showed significantly positive correlation with wheat grain yield. The high grain-leaf ratio could realize the yield factors coordinated growth in high level. The grain-leaf ratio had high heritability and easy to measure, so it could be a practical index applied to wheat breeding.