Analysis of yield elements for super high-yielding wheat varieties with different spike type and selection strategy in Shandong Province

The analysis of super high-yielding(9t/hm 2)varieties of winter wheat in Shandong Province revealed that the super high-yield of winter wheat was mainly attributed to significant increase of spike number The spike number played a principal role in yield of grains among big spike varieties, but particle number per spike did the same among multiple spike varieties In terms of breeding, selection of multiple spike character in big spike materials and big spike character in multiple spike materials of winter wheat should be paid more attention