从源库角度将小麦品种划分为源限型、库限型和源库互作型三种类型 ,并以大粒小麦兰考 86( 79) (源限型 )、豫麦 2 1号 (库限型 )和大穗多粒小麦兰考 90 6(源库互作型 )为材料 ,进行了穗粒重的形成试验研究。结果表明 :源限型和源库互作型品种子粒容积大 ,粒重增长快 ,穗部性状优越 ,子粒灌浆速度前期增加快 ,后期下降平缓 ,粒重与灌浆速度呈显著的正相关 ,而库限型品种这种相关关系不明显。叶片对源限型品种、叶鞘对源库互作型品种、茎秆对库限型品种子粒增重贡献较大 The wheat cultivars were divided into three types (source limited type, limited type and source and sink type) from the perspective of the source database. The wheat varieties Lanyao 86 (79) (source type), Yumai 2 1 ) And large spike and Triticum aestivum 9090 (source-sink interaction type) were used as experimental materials to study the formation of spike weight. The results showed that: the grain size of the source-sink type and the source-sink type was large, the grain weight increased rapidly, the ear traits were superior, the grain filling speed increased rapidly in the early period, the later declined gently, the grain weight was significantly positively correlated with the filling speed Library limited varieties of this correlation is not obvious. Leaf pairs of source-limited varieties, leaf sheath pairs of source and sink interaction varieties, stems on the limited varieties of grain weight contribution to the larger