驯化
光合作用
生物
农学
禾本科
产量(工程)
粮食产量
Spike(软件开发)
植物
生态学
经济
管理
冶金
材料科学
作者
Rut Sánchez-Bragado,Gemma Molero,José Luís Araus,Gustavo A. Slafer
标识
DOI:10.1016/j.tplants.2022.10.010
摘要
Awnless and awned wheat is found across the globe. Archeological and historical records show that the wheat spike was predominantly awned across the many millennia following domestication. Thus, ancient farmers did not select against awns at least until the last millennium. Here, we describe the evolution and domestication of wheat awns, quantifying their role in spike photosynthesis and yield under contrasting environments. Awns increase grain weight directly (increasing the size of all grains) or indirectly (increasing the failure of distal grains), but not as a consequence of additional spike photosynthesis. However, a trade-off is produced through decreasing grain number. Thus, favorable effects of awns on yield are not consistently found across environments.
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