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对不同基因型冬小麦在长春分期播种其穗分化的观察结果表明，冬小麦越冬前穗分化时期与越冬存活率间的关系因基因型的不同而有别，耐寒性较弱的品种以生长锥未伸长期越冬较安全；耐寒性强的品种越冬前处于生长锥伸长期可安全越冬，适播期较宽。穗分化结束日期因品种而不同，但同一品种不同播期间无差异。穗分化总日数与小区产量相关显著。
The observation on the spike differentiation of different winter wheat cultivars with different genotypes in sowing in Changchun showed that the relationship between the pre-spike differentiation and winter survival rate of winter wheat differs according to genotypes. Long-term wintering is safer; cold-tolerant varieties in winter before the growth cone can be safely wintering, suitable sowing period. Spike differentiation end date varies by species, but there is no difference between the same varieties of sowing date. The total number of spike differentiation was significantly correlated with plot yield.