University of Tasmania
Browse

File(s) under permanent embargo

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

journal contribution
posted on 2023-05-21, 03:22 authored by Li, X, Fang, C, Yang, Y, Lv, T, Su, T, Chen, L, Nan, H, Li, S, Zhao, X, Lu, S, Dong, L, Cheng, Q, Tang, Y, Xu, M, Abe, J, Hou, X, James WellerJames Weller, Kong, F, Liu, B

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.

Funding

Grains Research & Development Corporation

History

Publication title

Current Biology

Volume

31

Issue

17

Pagination

3755-3767

ISSN

1879-0445

Department/School

School of Natural Sciences

Publisher

Cell Press

Place of publication

United Kingdom

Rights statement

Copyright 2021 Elsevier Inc.

Repository Status

  • Restricted

Socio-economic Objectives

Integration of farm and forestry

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC