Grey CorRelation Analysis of Harvest Index and Agronomic TraitsIn Wheat

The experiments were conducted with nine cultivars.The gray correlation of plant height,grain number per spike,peduncle length,stem biomass,total biomass yield,l000-grain weight and harvest index were analyzed.The results showed that:the order of gray correlation with harvest index was peduncle length ear length grain number per spike main stem biomass yield plant height l000-grain weight yield per plant total biomass yield,while the order of gray correlation with yield per plant was total biomass yield main stem biomass yield grain number per spike l000-grain weight plant heightpeduncle length ear length harvest index.So in the goal of breeding for super high yield in wheat,super high yield can be obtained by increasing biomass yield,grain number per spike,and l000-grain weight based on harvest spike number and harvest index,and super high yield.