Yield formation strategies of durum wheat landraces with distinct pattern of dispersal within the Mediterranean basin: II. Biomass production and allocation

摘要: The purpose of this study was to determine if the geographical pattern dispersal durum wheat within Mediterranean region associated with variation in biomass and leaf area accumulation distribution, as well relationships between these traits grain yield. Fifty-two landraces previously genetically characterized dispersed by north or south basin were grown three rainfed sites northeastern Spain. origin influenced production allocation. Landraces from side produced 19% more tillers than those south, resulting largerbiomass allocation on atanthesis. Southern showed a better adaptation drought environments. They had 6% larger plot stand at jointing, 9% anthesis distributed it mostly main stem. Besides, they efficient reproductive organs because their mean harvest index (HI) exceeded that northern 7%. Crop dry weight (CDW) (LAI) jointing positively related yield both groups landraces, whereas anthesis, no relationship found Pre-anthesis assimilates contributed 40 90% southern genotypes, respectively. These results highlight relevance early crop development remobilization stored adaptative # 2005 Elsevier B.V. All rights reserved.