Natural variation at the soybean J locus improves adaptation to the tropics and enhances yield
Natural variation at the soybean J locus improves adaptation to the tropics and enhances yield
复制标题
大豆 J 基因座的自然变异提高了对热带的适应能力并提高了产量
DOI：
10.1038/ng.3819
复制
发表时间：
2017-05-01
期刊：
影响因子：
30.8
通讯作者：
Kong, Fanjiang
中科院分区：
文献类型：
--
作者：
Lu, Sijia;Zhao, Xiaohui;Kong, Fanjiang
大豆是原产于温带地区的主要豆科作物，光周期反应是其纬向适应性的关键因素。来自温带地区的品种被引进到低纬度地区，成熟早，粮食产量极低。引入长幼体(LJ)性状延长了营养阶段，提高了短日照条件下的产量，从而使热带地区的种植得以扩大。本文报道了与LJ性状相关的主要经典基因J的克隆和鉴定，并将其鉴定为拟南芥早花3号(ELF3)的同源基因。J在遗传上依赖于豆科植物特有的开花抑制基因E1，J蛋白物理上与E1启动子结合，下调其转录，解除两个重要的开花基因T(FT)的抑制，促进短日照开花。我们的发现确定了大豆花期控制的一个重要新成分，并为大豆适应热带地区提供了新的见解。
Soybean is a major legume crop originating in temperate regions, and photoperiod responsiveness is a key factor in its latitudinal adaptation. Varieties from temperate regions introduced to lower latitudes mature early and have extremely low grain yields. Introduction of the long-juvenile (LJ) trait extends the vegetative phase and improves yield under short-day conditions, thereby enabling expansion of cultivation in tropical regions. Here we report the cloning and characterization of J, the major classical locus conferring the LJ trait, and identify J as the ortholog of Arabidopsis thaliana EARLY FLOWERING 3 (ELF3). J depends genetically on the legume-specific flowering repressor E1, and J protein physically associates with the E1 promoter to downregulate its transcription, relieving repression of two important FLOWERING LOCUS T (FT) genes and promoting flowering under short days. Our findings identify an important new component in flowering-time control in soybean and provide new insight into soybean adaptation to tropical regions.