Integrative translational genomics of the GA oxidase superfamily identifies a domestication-selected GmGA2ox16 haplotype for salt tolerance breeding in soybean.
Zhao K, Guo D, Shan L, Dong Y, Liu X
Summary
PubMedResearchers identified a specific gene (GmGA2ox16) in soybean that activates under salt stress and improves plant survival in salty soils. They discovered superior versions of this gene across thousands of soybean varieties that could accelerate breeding programs for salt-tolerant crops.
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Key Findings
Comprehensive analysis of soybean GA oxidase gene family revealed 48 genes organized into 4 distinct subclades with specialized stress-response functions
GmGA2ox16 gene rapidly activates under salt stress and enhances antioxidant capacity, conferring measurable salt tolerance in soybean and yeast models
Mining 2,898 resequenced soybean accessions identified 2 superior GmGA2ox16 haplotypes defined by specific DNA mutations in catalytic domains suitable for breeding applications
Original Abstract
Soil salinity severely constrains global soybean productivity, yet conventional gene discovery remains bottlenecked by the slow pace of forward genetics and the limited breeding relevance of reverse genetics. Here, we establish a translational genomics paradigm that integrates systematic gene family characterization with large-scale population mining to rapidly identify breeding-ready alleles. We first comprehensively analyzed the soybean GA oxidase (GmGAox) superfamily, revealing 48 genes that expanded via whole-genome and tandem duplications into four subclades with distinct regulatory architectures enriched for stress and hormone-responsive cis-elements. Transcriptome profiling and functional validation identified six C19-GmGA2ox members, particularly GmGA2ox16, as rapidly salt-inducible genes that enhance antioxidant capacity and confer stress tolerance in yeast and soybean hairy roots. By re-mining 2898 resequenced accessions, we uncovered two GmGA2ox16 haplotypes defined by non-synonymous SNPs (N31D, A182P) in conserved catalytic domains. The superior GmGA2ox16
This connects to 10 other discoveries — 1 species, 4 topics, 5 related articles
Species Mentioned
The soybean, soy bean, or soya bean is a species of legume native to East Asia, widely grown for its edible bean. Soy is a staple crop, the world's most grown legume, and an important animal feed.
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