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Related Experiment Video

Updated: Jul 14, 2026

Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
10:08

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Published on: March 5, 2017

Conserved noncoding genomic sequences associated with a flowering-time quantitative trait locus in maize.

Silvio Salvi1, Giorgio Sponza, Michele Morgante

  • 1Department of Agroenvironmental Science and Technology, University of Bologna, Viale Fanin, 44, 40127 Bologna, Italy. silvio.salvi@unibo.it

Proceedings of the National Academy of Sciences of the United States of America
|June 28, 2007
PubMed
Summary

Researchers identified the major flowering-time gene, Vegetative to generative transition 1 (Vgt1), in maize. This gene acts as a cis-acting regulatory element, influencing adaptation and evolution in crops.

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Lateral Root Inducible System in Arabidopsis and Maize
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Published on: January 14, 2016

Area of Science:

  • Plant genetics
  • Agricultural science
  • Evolutionary biology

Background:

  • Flowering time is crucial for crop adaptation to diverse environments.
  • While quantitative trait loci (QTLs) for flowering time are mapped, their molecular underpinnings remain largely unknown.
  • Understanding flowering time control is key to improving crop yields and adaptability.

Purpose of the Study:

  • To elucidate the molecular basis of the major flowering-time quantitative trait locus, Vegetative to generative transition 1 (Vgt1), in maize.
  • To investigate the regulatory role of Vgt1 in controlling flowering time.
  • To explore the evolutionary conservation of regulatory elements involved in flowering time.

Main Methods:

  • Positional cloning and association mapping were employed to pinpoint the Vgt1 locus.
  • Correlation analysis was used to link Vgt1 alleles with downstream gene expression levels.
  • Comparative genomics identified conserved noncoding sequences across related species.

Main Results:

  • The major flowering-time QTL, Vgt1, was resolved to a 2-kb noncoding region located 70 kb upstream of an Ap2-like transcription factor.
  • Vgt1 functions as a cis-acting regulatory element, with distinct alleles correlating with differential expression of the downstream gene.
  • Evolutionarily conserved noncoding sequences were identified within Vgt1 across maize, sorghum, and rice.

Conclusions:

  • Changes in distant cis-acting regulatory regions are significant drivers of plant genetic adaptation.
  • Vgt1 represents a key regulatory element influencing maize flowering time and adaptation.
  • The findings highlight the role of noncoding DNA evolution in crop breeding and plant evolution.