Abstract: | Several selective indexes of wheat plant type, canopy, plant height, spikes/per unit area were discussed in order ,to improve breeding predictability and selection efficiency, Middle-type wheat cultivars could achieve high and stable yield and their agronomy characters include 80-90cm plant height, flag leaf a little wide, short and smaller area, length of flag leaf, second leaf and third leaf lengthened and leaf-baseangle and leaf-inclination-angle increased in order. Plant type exits in dynamic change from compact type in earlier growing stage to loose type in later growing stage. Modem wheat cultivar breeding should attach importance to bio-yield, grains per unit area, grain number per spike/flag leaf area, grain weight per spike/flag leaf area based on higher harvest index. |