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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

Reshaping of the maize transcriptome by domestication.

Ruth Swanson-Wagner¹, Roman Briskine, Robert Schaefer

¹Microbial and Plant Genomics Institute, Department of Plant Biology, University of Minnesota, Saint Paul, MN 55108, USA.

Proceedings of the National Academy of Sciences of the United States of America

|July 4, 2012

Summary

This summary is machine-generated.

Maize domestication significantly altered gene expression and coexpression in seedlings compared to its ancestor, teosinte. These changes highlight key genes involved in maize evolution and adaptation.

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Area of Science:

Plant genetics
Evolutionary biology
Genomics

Background:

Maize (Zea mays) evolved from teosinte through human domestication, resulting in significant morphological changes.
Maize serves as a model for studying adaptation, genome evolution, and complex trait genetics.

Purpose of the Study:

To investigate how domestication has reshaped the transcriptome of maize seedlings.
To identify genes with altered expression and coexpression patterns between maize and teosinte.

Main Methods:

Expression profiling of 18,242 genes across 38 maize and 24 teosinte genotypes.
Comparative analysis of gene expression levels and coexpression networks.

Main Results:

Over 600 genes showed significantly different expression levels between maize and teosinte.
More than 1,100 genes exhibited altered coexpression profiles, indicating transcriptome rewiring.
Genes with altered expression were enriched for targets of selection during domestication.
45 genes showed altered expression in inbred versus outcrossed teosinte, linked to biotic stress responses.

Conclusions:

Domestication has led to substantial alterations in the maize seedling transcriptome.
Combined gene expression and population genetic analyses reveal genes critical for maize evolution.
Transcriptome changes provide insights into adaptation and the genetic basis of complex traits in maize.