Effect of genotype and sowing time on growth, development and yield of high quality wheat

Under global warming conditions, appropriate sowing time of wheat is critical for high yields of high-quality wheat. Using field experiment, the effect of genotype and sowing time on the growth, development and yield of three high quality wheat cultivars was investigated. Results show that sowing date has various effects on the duration of growth stages of different wheat cultivars. Variation of duration of heading stage among different sowing dates is two days at most, and that of maturing stage is one day at most. Reasonable sowing time has a number of advantages for high quality wheat, including plant tillering, young spike differentiation, dry-matter accumulation and wintering safety，and harmonize individual plant characters and community quality to get proper spike number per hectare, kernels per spike and 1000-kernel weight, furthermore, the high yield of high quality wheat.Under the same yield level,acting force of the two controllable factors on yield of high quality wheat is: sowing time ＞ genotype.