1950s—2010s山东小麦品种产量形成与干物质转运特征分析OA

In order to deeply understand the characteristics of yield formation and dry matter transport of wheat varieties in Shandong Province during the 1950s–2010s,8 wheat varieties were selected for field tests,including Bima No.1,Jinan No.2,Taishan No.1,Lumai No.1,Yannong 19,Jimai 22,Tanmai 98,and Luyuan 502.The yield and its components,dry matter translocation characteristics,and changes in dry matter allocation among different organs of these varieties were comparatively analyzed.The results indicated that with variety improvement,wheat yield,grains per spike,and thousand-kernel weight showed an increasing trend,while the number of spikes remained relatively stable.The contribution rate of pre-anthesis dry matter storage and translocation to grain decreased,while the contribution rate of post-anthesis dry matter accumulation gradually increased.The proportion of dry matter allocated to leaves and spikes increased,while that allocated to stems decreased,indicating enhanced sink capacity and source strength in wheat.Coordinating yield components,promoting the re-translocation of pre-anthesis stored substances based on ensuring post-anthesis dry matter accumulation,and optimizing source-sink structure were identified as important objectives for future high yield wheat breeding.