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Overcoming the genetic compensation response of soybean florigens to improve adaptation and yield at low latitudes

Citation

Li, X and Fang, C and Yang, Y and Lv, T and Su, T and Chen, L and Nan, H and Li, S and Zhao, X and Lu, S and Dong, L and Cheng, Q and Tang, Y and Xu, M and Abe, J and Hou, X and Weller, JL and Kong, F and Liu, B, Overcoming the genetic compensation response of soybean florigens to improve adaptation and yield at low latitudes, Current Biology, 31, (17) pp. 3755-3767. ISSN 1879-0445 (2021) [Refereed Article]

Copyright Statement

Copyright 2021 Elsevier Inc.

DOI: doi:10.1016/j.cub.2021.06.037

Abstract

The classical soybean (Glycine max) trait long juvenile (LJ) is essentially a reduction in sensitivity to short-day (SD) conditions for induction and completion of flowering, and has been introduced into soybean cultivars to improve yield in tropical environments. However, only one locus, J, is known to confer LJ in low-latitude varieties. Here, we defined two quantitative trait loci contributing to the LJ trait, LJ16.1 and LJ16.2, and identified them as the florigen (FT) homologs FT2a and FT5a, respectively. The two selected florigen variations both delay flowering time under SD conditions by repressing the floral meristem identity gene GmAPETALA1. Single mutants have a relatively subtle effect on flowering time and displayed a substantial genetic compensation response, but this was absent in ft2a ft5a double mutants, which showed an enhanced LJ phenotype that translated to higher yields under SD conditions. A survey of sequence diversity suggests that FT2a and FT5a variants have diverse origins and have played distinct roles as soybean spread to lower latitudes. Our results show that integration of variants in the florigen genes offers a strategy for customizing flowering time to adjust adaptation and improve crop productivity in tropical regions.

Item Details

Item Type:Refereed Article
Keywords:florigens, natural variation, long-juvenile trait, LJ, yield, low-latitude adaptation
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Integration of farm and forestry
UTAS Author:Weller, JL (Associate Professor Jim Weller)
ID Code:147249
Year Published:2021
Deposited By:Plant Science
Deposited On:2021-10-20
Last Modified:2021-11-19
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