Traits associated with winter wheat grain yield in Central and West Asia

作     者：Marta Silva Lopes Didem Saglam Mutlu Ozdogan Matthew Reynolds 

作者机构：CIMMYT University of Ahi Evran Faculty of Agriculture Department of Plant Protection Center for Sustainability and the Global Environment University of Wisconsin‐Madison 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2014年第56卷第7期

页      面：673-683页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 

基　　金：The Mexican Ministry of Agriculture Livestock Rural Development Fisheries and Food(SAGARPA) via MasAgro Seeds of Discovery is acknowledged for financial support 

主　　题：Biomass GxE earliness phenology plant height NDVI rain-fed yield 

摘      要：Improved adaptation of winter wheat （Triticum aestivum L.） to drought and heat may be influenced by days to heading, plant height, biomass, canopy temperature （CT） at grain fil ing, and rate of senescence. This study shows that, under supplemental irrigation or rainfed conditions, days to heading and plant height together explain up to 68%of grain yield （GY） variation, and these associations were further confirmed in several locations across West and Central Asia. Days to heading can be slightly reduced below that of check line Karahan to further improve GY while avoiding the effect of late frosts. Plant height has been decreased in recent germplasm, but further reductions below that of check line Karahan could stil improve GY in a wide range of environ-ments. However, in Iranian sites, tal er genotypes showed better adaptation with higher biomass and increased reserves＆amp;nbsp;for grain fil ing. Canopy temperature and rate senescence were not associated with GY. A normalized difference vegetation index, used to estimate biomass （Feekes stages 4-5）, had intermediate heritability across environments and correlated positively with GY under low plant density and should be explored further as a tool for early selection.