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Abstract

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.

Item Type:	Article
Authors/Creators:	Lu, S and Zhao, X and Hu, Y and Liu, S and Nan, H and Li, Xiaoming and Fang, C and Cao, D and Shi, X and Kong, L and Su, T and Zhang, F and Li, S and Wang, Z and Yuan, X and Cober, ER and Weller, JL and Liu, B and Hou, X and Tian, Z and Kong, F
Keywords:	soybean, J locus, yield, tropics, genetic adaptation, variation, legume crops, ELF3
Journal or Publication Title:	Nature Genetics
Publisher:	Nature Publishing Group
ISSN:	1061-4036
DOI / ID Number:	10.1038/ng.3819
Copyright Information:	© 2017 Nature America
Related URLs:	Google Scholar: Weller, JL UTAS Profile: Weller, JL
Item Statistics:	View statistics for this item

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