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Agrobacterium-Mediated Immature Embryo Transformation of Recalcitrant Maize Inbred Lines Using Morphogenic Genes

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Mutator System Derivatives Isolated from Sugarcane Genome Sequence.

M E Manetti, M Rossi, G M Q Cruz

Tropical Plant Biology

|August 21, 2012

Summary

Sugarcane harbors four distinct Mutator-like transposon classes, diversifying early in Angiosperms. These transposons exhibit lineage-specific evolution and genomic distribution patterns, offering insights into the sugarcane genome.

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Area of Science:

Genomics
Molecular Biology
Evolutionary Biology

Background:

Mutator-like transposons are prevalent in the sugarcane transcriptome.
Previous studies identified four distinct transposon classes (I-IV) with early diversification in Angiosperms.

Purpose of the Study:

To characterize the structure and organization of the Mutator system in the sugarcane genome.
To investigate the evolutionary history and genomic distribution of Mutator transposons in sugarcane.

Main Methods:

Phylogenetic reconstruction of sequenced transcripts.
Sequencing of six BAC clones from a sugarcane genomic library.
Comparative genomic analysis with maize and rice.

Main Results:

Identified two true transposon lineages and two domesticated transposase lineages within the sugarcane Mutator system.
Each Mutator transposase class shows lineage-specific molecular structures and evolutionary patterns.
Discovered syntenic regions containing MUSTANG genes and retrotransposon insertions differentiating sugarcane haplotypes.

Conclusions:

The sugarcane Mutator system is complex, with domesticated transposase lineages and lineage-specific evolution.
Genomic distribution patterns and molecular structures provide insights into transposon evolution in grasses.
Comparative analysis enriches understanding of Mutator systems across different grass genomes.