ArticleBMC evolutionary biology2016
Molecular and geographic evolutionary support for the essential role of GIGANTEAa in soybean domestication of flowering time.
Article in BMC evolutionary biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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33 citing papers in PubMed, 69 citations in OpenAlex.
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- Progress in soybean functional genomics over the past decade.Plant biotechnology journal · 2022Review
- Genetic Diversity and Selection Footprints in the Genome of Brazilian Soybean Cultivars.Frontiers in plant science · 2022Article
- Molecular Genetic Understanding of Photoperiodic Regulation of Flowering Time inInternational journal of molecular sciences · 2021Review
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- Natural variation and artificial selection of photoperiodic flowering genes and their applications in crop adaptation.aBIOTECH · 2021Review
- A flowering time locus dependent onMolecular breeding : new strategies in plant improvement · 2021Article
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- Whole-genome sequence diversity and association analysis of 198 soybean accessions in mini-core collections.DNA research : an international journal for rapid publication of reports on genes and genomes · 2021Article
- The Synchronized Efforts to Decipher the Molecular Basis for Soybean Maturity LociFrontiers in plant science · 2021Review
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Authors and funding
7 authors at 6 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundFlowering time is a domestication trait of Glycine max and varies in soybeans, yet, a gene for flowering time variation has not been associated with soybean domestication. GIGANTEA (GI) is a major gene involved in the control of flowering time in Arabidopsis, although three GI homologs complicate this model in the soybean genome.
resultsIn the present work, we revealed that the geographic evolution of the GIGANTEAa (GIa) haplotypes in G. max (GmGIa) and Glycine soja (GsGIa). Three GIa haplotypes (H1, H2, and H3) were found among cultivated soybeans and their wild relatives, yet an additional 44 diverse haplotypes were observed in wild soybeans. H1 had a premature stop codon in the 10(th) exon, whereas the other haplotypes encoded full-length GIa protein isoforms. In both wild-type and cultivated soybeans, H2 was present in the Southern region of China, and H3 was restricted to areas near the Northeast region of China. H1 was genetically derived from H2, and it was dominant and widely distributed among cultivated soybeans, whereas in wild populations, the ortholog of this domesticated haplotype H1 was only found in Yellow River basin with a low frequency. Moreover, this mutated GIa haplotype significantly correlated with early flowering. We further determined that the differences in gene expression of the three GmGIa haplotypes were not correlated to flowering time variations in cultivated soybeans. However, only the truncated GmGIa H1 could partially rescue gi-2 Arabidopsis from delayed flowering in transgenic plants, whereas both GmGIa H2 and H3 haplotypes could significantly repress flowering in transgenic Arabidopsis with a wild-type background.
conclusionsThus, GmGIa haplotype diversification may have contributed to flowering time adaptation that facilitated the radiation of domesticated soybeans. In light of the evolution of the GIa gene, soybean domestication history for an early flowering phenotype is discussed.
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