小麦茎质系数的基因型差异及与产量性状关系的初步研究

The Genotype Difference of Weight∶Length Per Stem(W/L) and Its Relation to Yield Characters in Wheat

利用 11个不同的小麦基因型 ,对茎质系数的基因型差异及其与产量性状的关系进行了初步研究。结果表明 :茎质系数在小麦基因型间存在极显著差异 ,与单茎草重、穗粒数、千粒重、穗粒重呈极显著的正相关 ,与穗数、经济系数呈极显著的负相关 ,重穗型品种的茎质系数极显著地高于多穗型品种 ,但其经济系数、子粒产量 /草产量 (库源比 )极显著地低于多穗型品种 ,选育中间型品种可以实现高产与抗倒的有机结合。

The 11 wheat cultivars under plot cultivated condition were used in this experiment.The results showed that there were highly significant differences between various cultivars.W∶L was highly significantly positive related to grass weight per stem,grains per spike,thousand grain weight,spike weight per stem and was highly significant negative related to spikes,harvest index.W∶L of macro spike cultivars was much higher than that of multi spike cultivars,but harvest index and grain yield∶grass yield(sink∶source)were much lower.The breeding of mid typed cultivars can harmonize relations between high yield and lodging resistance.