The study on the characteristics of development and seed setting of different spikelet and floret positions was important for the realization of big-spike-cultural-goal with more spikelets and grains.With both the winter type(WV) and spring type(SV) varie
The study on the characteristics of development and seed setting of different spikelet and floret positions was important for the realization of big-spike-cultural-goal with more spikelets and grains.With both the winter type(WV) and spring type(SV) varie
确定小麦不同小穗位和小花位发育与结实特性是实现大穗多粒的重要前提.本文通过对冬、春性小麦品种分期播种试验得出,较高的小穗结实力是增加穗粒数的重要因素.不同播期、品种之间,小穗粒重和粒数呈现相同的变化趋势.中部以及基部小穗粒重与穗粒重之间呈高度正相关.体现环境差异的播期效应以对中部小穗发育的影响为主,而冬、春性品种的基因型差异可反映在各个小穗位上.第2小花位的子粒发育状况反映整个小穗的生产能力.结果表明,促进中部优势小穗(第5～15小穗)结实和第1～3小花位子粒发育是提高小花结实率和穗粒重的关键.