不同粒重型小麦的源性状研究

以不同粒(重)型冬小麦品种为材料,对若干源性状与粒重关系的研究结果表明:不问基因型间单穗叶面积、叶干重、鞘茎干重、颖芒干重及穗轴干重差异显著,其差异与千粒重顺序一致,与穗粒重不尽一致。不同基因型间单粒重差异在籽粒发育前、中期即已明显,而穗粒重差异直到后期才表现出来,单粒重与穗粒数之间存在着较强的调节(或补偿)作用,并受到基因型的支配。不同粒重型间经济系数的高低,与单粒重大小相反,而与鞘茎干重下降率高低顺序相同。

The Studies on Source Performance among Different Grain Weight Varieties in Wheat

The studies on relationship between some source performance and grain weignt indicated that there was significative difference in leaves area and dry weignt of leaves,leavse sheath and stem,glume awn and ear axis among different grain weignt varietise.This difference consisted with weight per thousand grain but not with grain weignt per ear.The grain weignt difference among varieties was showed up already in early and middle stage of grain formation,but the wei- ght per ear only in the latter.A grain weight...